Hot rolled steel products are divided into two groups: hot rolled coils produced through hot rolling and hot rolled steel plates, which are made by cutting material from hot rolled coils. Slabs produced from a continuous casting system are rolled, cooled and coiled into the sizes required by the customers.
POSCO has six hot rolling plants in Pohang and Gwanyang works, garnering a global reach. Hot rolled products are used extensively for various applications including machines, architectural structures, car structures, general/API steel pipes and cold rolling.
Steel for Cold Rolled Steel
This product is typically used for cold rolling and among the hot rolled products has the lowest strength. It has wide applications ranging from regular machining to drawing and ironing. It is also used in a variety of cold rolled products including CR, GI, EG and color plates.
Key Specifications
?Mild Steel
Mild Steel has a low carbon content and is relatively soft, having a tensile strength of no greater than 340 MPa. Its good elongation and great formability make the steel popular for many applications ranging from regular to sophisticated machining. Its most common application is automotive parts
Key Specifications
?Hot rolled CQ (commercial quality) mild steel contains a low level of carbon (0.13-0.2%), with a tensile strength of over 270 MPa. It is extensively used for auto chassis parts having a thickness of over 1.2 mm. Products include HR, PO, HGI and HGA.
ApplicationsCommercial quality automotive members and chassis parts
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
TS | PO | 111~ | 270~550 | 29~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- |
Hot rolled DQ (drawing quality) mild steel contains a low level of carbon (0.13-0.2%), with a tensile strength of over 270 MPa and elongation of over 33%. It is extensively used for auto chassis parts having a thickness of over 1.2 mm. Products include HR, PO, HGI and HGA.
ApplicationsAutomotive members and chassis parts that require high workability
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
TS | PO | 111~ | 270~ | 33~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- |
Hot rolled DDQ (deep drawing quality) mild steel contains a very low level of carbon (0.03-0.12%), thus is ideal for applications that require higher workability than grade D hot rolled steel. Its tensile strength is over 270 MPa, and its elongation is over 35%. It is used extensively for auto parts having a thickness of over 1.2 mm that require drawing. Products include HR, PO, HGI and HGA.
ApplicationsAutomotive members and chassis parts that require higher workability than grade D hot rolled steel
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
TS | PO | 111~ | 270~ | 36~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- | - | - |
High Strength Steel is made by adding silicon, manganese, nickel, chromium, copper and other elements to carbon steel containing 0.2 percent of carbon for higher performance. With a tensile strength of about 50 kg/mm2, this steel features a reasonable level of strength and toughness. High Strength Steel can be classified into bake-hardening steel, solid-solution strengthening and precipitation hardening steel. It also has many variants: BH (Bake-Hardenable) steel, HSLA (high strength low alloy), R (rephosphorized) steel, IF (Interstitial Free) HSS and ATOS (AuTOmobile Structural) steel.
Key Specifications
?High strength low alloy (HSLA) is made by adding precipitation enhancing elements (i.e., Ti, Nb) to low carbon steel to disperse carbonized precipitation into fine grains. Common elements contained in the precipitation that are created during this process include NbC, TiC, VC and AIN. These elements interrupt dislocation motion, improving strength and impact toughness. The smaller the precipitation, the higher the strength becomes. Affordability coupled with high strength makes the steel popular as reinforcement for impact toughness in motor vehicles.
Hot rolled A715-40 is compliant with ASTM (American Society for Testing and Materials) standards, providing a yield strength of over 280 MPa. It has a tensile strength of over 350 MPa. Thanks to its high yield strength and low elongation, it is widely used for parts that require less forming.
ApplicationsAuto chassis parts that require high strength and fatigue resistance, such as suspension
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
YS | PO | 280~350 | 350~ | 30~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- | - | - |
Hot rolled A715-50 is compliant with ASTM (American Society for Testing and Materials) standards, providing a yield strength of over 346 MPa. It has a tensile strength of over 414 MPa. Thanks to its high yield strength and low elongation, it is widely used for parts that require less forming.
ApplicationsAuto chassis parts that require high strength and fatigue resistance, such as wheels and suspension
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
YS | PO | 346~ | 414~ | 23~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- | - | - |
Hot rolled A715-55 is compliant with ASTM (American Society for Testing and Materials) standards, providing a yield strength of over 380 MPa. It has a tensile strength of over 480 MPa. Thanks to its high yield strength and low elongation, it is widely used for parts that require less forming.
ApplicationsAuto chassis parts that require high strength and fatigue resistance, such as wheels and suspension
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
YS | PO | 380~ | 480~ | 18~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- | - | - |
Hot rolled A715-60 is compliant with ASTM (American Society for Testing and Materials) standards, providing a yield strength of over 410 MPa. It has a tensile strength of over 480 MPa. Thanks to its high yield strength and low elongation, it is widely used for parts that require less forming.
ApplicationsAuto chassis parts that require high strength and fatigue resistance, such as wheels and suspension
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
YS | PO | 410~ | 480~ | 20~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- | - | - |
Hot rolled A715-65 is compliant with ASTM (American Society for Testing and Materials) standards, providing a yield strength of over 450 MPa. It has a tensile strength of over 520 MPa. Thanks to its high yield strength and low elongation, it is widely used for parts that require less forming.
ApplicationsAuto chassis parts that require high strength and fatigue resistance, such as wheels and suspension
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
YS | PO | 450~ | 520~ | 14~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- | - | - |
Hot rolled A715-70 is compliant with ASTM (American Society for Testing and Materials) standards, providing a yield strength of over 500 MPa. It has a tensile strength of over 570 MPa. Thanks to its high yield strength and low elongation, it is widely used for parts that require less forming.
ApplicationsAuto chassis parts that require high strength and fatigue resistance, such as wheels and suspension
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
YS | PO | 500~600 | 570~ | 18~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- | - | - |
Hot rolled A715-80 is compliant with ASTM (American Society for Testing and Materials) standards, providing a yield strength of over 550 MPa, the highest of all hot rolled HSLA steels. It has a tensile strength of over 620 MPa. Thanks to its high yield strength and low elongation, it is widely used for parts that require less forming.
ApplicationsAuto chassis parts that require high strength and fatigue resistance, such as wheels and suspension
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
YS | PO | 550~650 | 620~ | 16~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- | - | - |
Hot rolled 440C provides a tensile strength of over 440 MPa. In general, customers in America and Europe use yield strength to classify steel while those in Asia including Korea and Japan use tensile strength for the same purpose. Hot rolled 440C is used for auto chassis parts that require high strength such as hot rolled A715-xx steels have.
ApplicationsAuto chassis parts that require high strength and fatigue resistance, such as wheels and suspension
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
TS | PO | 305~440 | 440~ | 27~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- | - | - |
Hot rolled 540C provides a tensile strength of over 540 MPa. In general, customers in America and Europe use yield strength to classify steel while those in Asia including Korea and Japan use tensile strength for the same purpose. Hot rolled 540C is used for auto chassis parts that require a higher strength than 440C.
ApplicationsAuto chassis parts that require high strength and fatigue resistance, such as wheels and suspension
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
TS | PO | 355~ | 540~ | 22~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- | - | - |
Hot rolled 590C provides a tensile strength of over 590 MPa. In general, customers in America and Europe use yield strength to classify steel while those in Asia including Korea and Japan use tensile strength for the same purpose. Hot rolled 590C is used for auto chassis parts that require a higher strength than 540C.
ApplicationsAuto chassis parts that require high strength and fatigue resistance, such as wheels and suspension
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
TS | PO | 420~ | 590~ | 20~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- | - | - |
Hot rolled 780C provides a tensile strength of over 780 MPa. In general, customers in America and Europe use yield strength to classify steel while those in Asia including Korea and Japan use tensile strength for the same purpose. Hot rolled 780C has the highest tensile strength of all hot rolled HSLA steels and is extensively used for auto chassis parts that require high strength.
ApplicationsAuto chassis parts that require high strength and fatigue resistance, such as wheels and suspension
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
TS | PO | 685~835 | 780~ | 14~29 |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- | - | - |
Made by adding substitutional alloy elements such as P and Mn to low carbon steel. Such substitutional elements can cause grid deformation and increase internal stress, which disrupts dislocation motion and thus improves strength. In general, substitutional elements have less strength enhancing effect than interstitial atoms.
Hot rolled 310R provides a tensile strength of over 310 MPa, ideal for customers that require a higher strength than hot rolled commercial steel.
ApplicationsAutomotive chassis parts that require a higher strength than hot rolled commercial steel, including members and suspension
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
TS | PO | 186~ | 310~ | 34~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- | - | - |
Hot rolled 370R provides a tensile strength of over 370 MPa, thus ideal for auto chassis parts that require higher strength than hot rolled 310R.
ApplicationsAutomotive chassis parts that require a higher strength than hot rolled 310R, including members and suspension
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
TS | PO | 225~ | 370~ | 33~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- |
Hot rolled 400R provides a tensile strength of over 400 MPa, thus ideal for auto chassis parts that require high strength including members and chassis parts.
ApplicationsAutomotive chassis parts that require a higher strength than hot rolled 370R, including members and suspension
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
TS | PO | 255~ | 401~ | 32~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- | - | - |
Hot rolled 440R provides a tensile strength of over 440 MPa and a yield strength of over 305 MPa. It has the highest tensile strength of all hot rolled R-Class (Rephosphorized) steels.
ApplicationsAutomotive chassis parts that require high strength and fatigue resistance, including members and suspension
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
TS | PO | 305~ | 440~ | 30~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- |
It is a high-strength hot rolling product consisting of nano-sized precipitates and fine grains with a diameter of 1to 3 ¥ìm. It has high tensile strength due to the precitpitation strengthening by nano-sized precipitates, and excellent impact resistance and stable fatigue resistance with fine ferrite grains made by recrystallization controlled rolling. We controls the formation of impurities and emulsions in the steel to improve internal quality.
ATOS540 provides a yield strength of over 344 MPa and a tensile strength of over 540 MPa. With good impact toughness and fatigue resistance, it is widely used for structural members in motor vehicles, frames of commercial vehicles and boom arms of heavy-duty equipment.
ApplicationsFrames of commercial vehicles and crane booms of heavy-duty equipment that require high strength and fatigue resistance
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
TS | HR | 344 | 540~ | 20~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- | - | - |
Frames of commercial vehicles and crane booms of heavy-duty equipment that require high strength and fatigue resistance
ApplicationsStructural members in motor vehicles, frames of commercial vehicles and boom arms of heavy-duty equipment that require good impact toughness and fatigue resistance
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
TS | HR | 419~ | 616~ | 19~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- | - | - |
ATOS780 provides a yield strength of over 675 MPa and a tensile strength of over 780 MPa. The steel is widely used for structural members in motor vehicles, frames of commercial vehicles and boom arms of heavy-duty equipment.
ApplicationsStructural members in motor vehicles, frames of commercial vehicles and boom arms of heavy-duty equipment that require good impact toughness and fatigue resistance
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
TS | HR | 675~ | 785~ | 14~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- | - | - |
ATOS980 has a yield strength of over 880 MPa and a tensile strength of over 980 MPa, the highest of all hot rolled ATOS products. The steel is widely used for structural members in motor vehicles, frames of commercial vehicles and boom arms of heavy-duty equipment that require ultra-high strength
ApplicationsStructural members in motor vehicles, frames of commercial vehicles and boom arms of heavy-duty equipment that require ultra-high strength
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
TS | HR | 880~ | 980~ | 8~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- | - | - |
Advanced high strength steel is metallurgically classified as transformation toughened steel using low-temperature transformation structure. Its variants include DP (Dual Phase) steel, TRIP (TRansformation Induced Plasticity) steel, XF (eXtra Formable) steel, TWIP (TWinning Induced Plasticity) steel, CP (Complex Phase) steel, Mart (Martensitic) Steel, FB (Ferrite and Bainite) steel and HB (Hyper Burring) steel. Among them, those having a tensile strength of over 1 GPa are called giga steel.
Key Products
Dual phase (DP) steel is intended for those requiring ultra-high strength steel sheets to reduce body weight in their cars. It consists of a ferrite matrix and martensite having phase 2 structure. Featuring a low yield ratio of 0.5 to 0.6, DP steel is easy to work on and has the second highest elongation after TRIP steel. It also has good bake hardening since it is cooled quickly after being heated in an annealing furnace and goes through an overaging section at a temperature lower than Ms (to avoid hardening).
Hot rolled 590DP provides a yield strength of over 305 MPa and a tensile strength of over 590 MPa, thus ideal for auto chassis parts that require higher strength such as chassis parts.
ApplicationsAuto chassis parts that require impact toughness, such as suspension, arms and wheel discs
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
TS | CR/EG | ~450 | 590~ | 24~ |
GI/GA | ~450 | 590~ | 24~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
Hot rolled 780DP has a yield strength of over 440 MPa and a tensile strength of over 780 MPa, the highest of all hot rolled DP products
ApplicationsAuto chassis parts that require high strength and impact toughness, such as suspension, arms and wheel discs
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
TS | CR/EG | ~625 | 780~ | 14~ |
GI/GA | 400~625 | 780~ | 16~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- |
This steel is ferrite-bainite dual phase steel intended to provide a better hole expansion ratio. Ferrite has good elongation while bainite has good flangeability. Combination of the two means excellent hole expansion. To achieve quality FB steel, it is imperative to keep hot rolled steel sheet in the ferrite area properly to create highly pure ferrite and then concentrate solute atoms on untransformed austenite before cooling it quickly to ensure that austenite can transform into bainite.
Hot rolled 440FB provides a tensile strength of over 440 MPa, thus ideal for auto chassis parts that require HER of over 50. Hot rolled 440FB is dual phase steel consisting of ferrite and bainite. The minimal difference in harness between the two elements means that the steel has a good HER.
ApplicationsAuto chassis parts that require a high HER, such as arms and wheel discs
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
TS | PO | 305~445 | 440~ | 32~ |
Hot rolled 540FB is commonly used for chassis components that require a tensile strength of over 540 MPa, a yield strength of over 355 MPa and HER of over 50. 540FB is made by controlling the size and fraction between ferrite and bainite relative to 440FB to give it higher strength.
ApplicationsAuto chassis parts that require a high HER, such as arms and wheel discs
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
TS | PO | 410~550 | 540~ | 24~ |
Hot rolled 590FB is commonly used for chassis components that require a tensile strength of over 590 MPa, a yield strength of over 420 MPa and HER of over 50. It also has the highest HER of all hot rolled steels having a tensile strength of 590 MPa. This makes the steel ideal for automotive parts that require high strength and high HER.
ApplicationsAuto chassis parts that require high HER, such as suspension, arms and wheel discs
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
TS | PO | 420~ | 590~ | 22~ |
Hot rolled 780FB is commonly used for chassis components that require a tensile strength of over 780 MPa, a yield strength of over 540 MPa and HER of over 50. It also has the highest tensile strength of all hot rolled FB steels and is commonly used for automotive parts that require high strength hot rolled pates for lightweight purposes.
ApplicationsAuto chassis components that require high strength and high HER, such as suspension, arms and wheel discs
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
TS | PO | 600~800 | 780~ | 13~ |
Hot rolled 780HB (hyper burring) steel is single-phase ferritic steel having nanosize precipitation. The steel has very high strength and HER. This is because it has ferritic single phase featuring fine precipitation without coarse and large carbide. It experiences no red scale as it does not use Si as an alloy element and features superb surface quality. Designed to have a low carbon equivalent, it has good weldability.
ApplicationsAuto chassis parts that require a higher HER than 780HB, such as suspension, arms and wheel discs
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
HER(%) Spec. |
---|---|---|---|---|---|
TS | PO | 675~825 | 780~ | 15~ | 65~55~ |
As a single-phase austenitic steel featuring high carbon and high manganese, this steel experiences deformation twin upon machining, showing improved strain hardening ratio, strength and elongation. Photos of its microstructure taken during tensile testing provide proof of deformation twin. The greater the degree of deformation, the more twins occur.
Hot rolled 880TWIP provides a tensile strength of over 880 MPa. With higher strength and elongation than hot rolled commercial steel, it can be used for wheel or chassis parts that require high formability.
ApplicationsAuto chassis parts that can help reduce stamping such as lower arms and those with a sophisticated shape, such as styled wheels
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
TS | GI | 480 | 880~ | 45~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- | - | - |
This steel consists of martensite matrix and a small amount of bainite or ferrite. It has the highest tensile strength of all carbon steels, but very low ductility. Quick cooling and then appropriate tempering can improve the steel¡¯s yield strength.
Hot rolled 1180MART provides a tensile strength of over 1,180 MPa and a yield strength of 900 MPa. Products include HR and PO.
ApplicationsStructural members of commercial vehicles that are subjected to a high load, such as those that require roll forming including bumper beams and door impact beams, and truck frames
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
TS | PO | 900~1150 | 1180~ | 8~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- | - | - |
Hot rolled 1470M provides a tensile strength of over 1,470 MPa and contains more alloy elements than 1300MART to increase tensile and yield strength. Products include HR and PO.
ApplicationsStructural members of commercial vehicles that are subjected to a high load, such as those that require roll forming including bumper beams and door impact beams, and truck frames
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
TS | PO | 1175~ | 1400~ | 5~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- | - | - |
Post Heat Treatment Steel allows you to define heating/cooling conditions before or after the processing of steel. Its types include HPF (Hot Press Forming) steel, Autobeam and Stab (Stabilizer).
* Autobeam and Stab are registered product names.
Key Products
PHT
Unlike HPF that goes through tempering after forming within a cast, PHT steel is hot rolled before going through tempering. This way, the steel can have a very high strength. It also features high formability and weldability thanks to hardening elements such as B.
Hot rolled Autobeam gets tensile strength of around 1,300 MPa after forming and heat treatment. Autobeam is a registered product name of POSCO and mainly used for automotive parts.
ApplicationsAutomotive parts that require impact toughness and safety upon impact, such as door impact beams
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
Composition | HR | ~980 | 490~784 | 5~ |
Hot rolled Stab steel is intended for use in chassis components that require high impact toughness and fatigue resistance and is subjected to post heat treatment (quenching and tempering) to ensure sufficient strength. Post heat treatment after forming allows the steel to have a tensile strength of around 1,200 MPa. Stab is a registered product name of POSCO and mainly used for automotive parts.
ApplicationsAuto chassis parts that require impact toughness and fatigue resistance, such as stabilizers
Mechanical PropertiesGuaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
Composition | HR | ~1470 | ~1470 | 10~ |
Hot rolled 1470PHT has higher strength than Autobeam and Stab steels. Its tensile strength after heat treatment is around 1,500 MPa.
ApplicationsAuto chassis parts that require impact toughness and fatigue resistance, such as coupled torsion beam axles (CTBAs), stabilizers and door impact beams
Mechanical PropertiesBefore heat treatment
Guaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
Composition | HR | 350~550 | 500~750 | 16~ |
After heat treatment
Guaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
Composition | HR | 350~1250 | 1,000~1,700 | 6~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- | - | - |
Hot rolled 1800PHT is ideal for applications that require a higher strength than 1470PHT. With 1,800 MPa after heat treatment, it has the highest tensile strength of all hot rolled steels.
ApplicationsAuto chassis parts that require impact toughness and fatigue resistance, such as coupled torsion beam axles (CTBAs), stabilizers and door impact beams
Mechanical PropertiesBefore heat treatment
Guaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
Composition | HR | 350~600 | 600~800 | 16~ |
After heat treatment
Guaranteed Value |
Class | 0.2%YS, MPa Spec. |
TS, MPa Spec. |
El., % Spec. |
---|---|---|---|---|
Composition | HR | 1,300~1,500 | 1,700~1,900 | 8~ |
Uncoated | Electrogalvanized | Galvanized | Galvannealed |
---|---|---|---|
- | - | - |
A carbon steel product is called high carbon steel when it contains carbon of no less than 0.30 wt.% or contains carbon of no less than 0.15 wt.% and has an alloy element to allow for heat treatment. After final heat treatment, it has high strength and hardness. Its common uses include auto parts and industrial machines.
Key Specifications
?Our products for this application include those for general structures, welding structures and architectural structures. Their common uses include iron structures, bridges, ships and motor vehicles.
Key Specifications
?This product contains special elements such as P, Cu or Cr for improved resistance to corrosion in different environments. It is classified into those resistant to weathering, those resistant to corrosion caused by sulfuric acid from the combustion of fossil fuel and those resistant to salt contained seawater.
Key Specifications
?This product can be categorized into steel for structures, steel for pipes and steel for drawing. With superb weldability and formability, it is extensively used for architectural structures, pipe piles, gas pipes and car structures.
Key Specifications
?This steel is used for drilling in severely cold areas and for deep sea oil wells. It is characterized by high strength, good abrasion toughness and good resistance to corrosion.
Key Specifications
?This steel is used to make line pipes that transport crude oil or petrochemical products. Its characteristics include high tensile strength, extremely low-temperature toughness, hydrogen-induced crack resistance and good weldability. This steel is classified into tensile steel that can withstand low temperatures and sour resistant steel that can defy corrosion.
Key Specifications
?This product is used to make high-pressure containers holding LPG, acetylene and other gasses. Featuring good machinability and resistance to pressure, it is used for containers having an inner volume of no greater than 500 liters.
Key Specifications
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POSCO-made K-Steel Series Part 3. POSCO¡¯s non-heat treatable steel for automobile CHQ
2024-04-11
NOIMG:false µ¿¿µ»ó:N Àû¿ë»ç·Ê:N ¸ÞÀγëÃâ:Y
Steel-N
[3-minute Recap YouTube] Everything about the traction motor core that will give wings to electric vehicles!
2024-04-03
NOIMG:false µ¿¿µ»ó:Y Àû¿ë»ç·Ê:N ¸ÞÀγëÃâ:Y
Video Clips
POSCO-made K-STEEL Part 1, POSCO¡¯s antiviral color steel sheets for buildings and home appliances
2023-09-04
NOIMG:false µ¿¿µ»ó:N Àû¿ë»ç·Ê:N ¸ÞÀγëÃâ:N
Steel-N
¡®Steel ContiNew¡¯ A project to revitalize vacant houses using POSCO steel
2023-06-28
NOIMG:false µ¿¿µ»ó:N Àû¿ë»ç·Ê:N ¸ÞÀγëÃâ:N
Steel-N
POSCO Steeleon biomass color steel sheet has been certified as an eco-friendly product by Underwrite
2023-03-20
NOIMG:false µ¿¿µ»ó:N Àû¿ë»ç·Ê:N ¸ÞÀγëÃâ:N
Steel-N
The power of teamwork that led to the success of the¡®Steel E-Motive (SEM)¡¯ Project
2022-11-16
NOIMG:false µ¿¿µ»ó:N Àû¿ë»ç·Ê:N ¸ÞÀγëÃâ:N
ETC