Metallic material
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Metallic material
Innovation | Professionalism
Integrity | Efficiency
Hot rolled pickled steel strip for automobile structure refers to a type of steel strip that is produced through a specific manufacturing process known as hot rolling and pickling, and is used in the construction of automotive components and structures.
Hot rolling is a process in which steel is heated to high temperatures and then passed through rollers to shape it into a desired thickness and width. The steel strip is typically produced from a steel slab, and the hot rolling process helps to improve its mechanical properties, such as strength and ductility.
After hot rolling, the steel strip is pickled to remove any surface impurities, such as scale, rust, or oxides, that may have formed during the hot rolling process. Pickling involves immersing the steel strip in an acid solution, usually hydrochloric acid, which chemically reacts with the impurities and removes them from the surface of the steel. Pickling also results in a smooth, clean surface on the steel strip, which is important for subsequent processing and application in automobile manufacturing.
| Grade | Chemical composition% | |||||
| C | Si | Mn | P | S | Alt | |
SAPH310 | ≤0.10 | ≤0.30 | ≤0.50 | ≤0.035 | ≤0.035 | ≥0.010 |
SAPH370 | ≤0.21 | ≤0.30 | ≤0.75 | ≤0.035 | ≤0.035 | ≥0.010 |
SAPH400 | ≤0.21 | ≤0.30 | ≤1.40 | ≤0.030 | ≤0.025 | ≥0.010 |
SAPH440 | ≤0.21 | ≤0.30 | ≤1.50 | ≤0.030 | ≤0.025 | ≥0.010 |
SPFH540 | ≤0.15 | ≤0.50 | ≤1.80 | ≤0.025 | ≤0.025 | ≥0.010 |
SPFH590 | ≤0.18 | ≤0.60 | ≤2.00 | ≤0.025 | ≤0.025 | ≥0.010 |
| Grade | Mechanical properties | ||
| YS(MPa) | TS(MPa) | EL% | |
SAPH310 | – | ≥310 | ≥33 |
SAPH370 | – | ≥370 | ≥32 |
SAPH400 | – | ≥400 | ≥31 |
SAPH440 | – | ≥440 | ≥34 |
SPFH540 | ≥355 | ≥540 | ≥24 |
SPFH590 | ≥420 | ≥590 | ≥22 |
Purpose: used for automotive components, wheels and other automotive structural parts requiring formability
| Grade | Chemical composition% | |||||
| C | Si | Mn | P | S | Alt | |
B330CL | ≤0.10 | ≤0.30 | ≤0.50 | ≤0.030 | ≤0.025 | ≥0.010 |
B380CL | ≤0.12 | ≤0.30 | ≤1.20 | ≤0.030 | ≤0.025 | ≥0.010 |
B420CL | ≤0.12 | ≤0.30 | ≤1.50 | ≤0.030 | ≤0.025 | ≥0.010 |
B450CL | ≤0.10 | ≤0.30 | ≤1.50 | ≤0.030 | ≤0.025 | ≥0.010 |
B500CL | ≤0.12 | ≤0.30 | ≤1.50 | ≤0.030 | ≤0.025 | ≥0.010 |
B550CL | ≤0.12 | ≤0.30 | ≤2.0 | ≤0.030 | ≤0.025 | ≥0.010 |
B600CL | ≤0.15 | ≤0.30 | ≤2.0 | ≤0.030 | ≤0.025 | ≥0.010 |
B650CL | ≤0.15 | ≤0.30 | ≤2.0 | ≤0.030 | ≤0.025 | ≥0.010 |
| Grade | Mechanical properties | ||
| YS(MPa) | TS(MPa) | EL% | |
B330CL | ≥225 | 330-430 | ≥33 |
B380CL | ≥260 | 380-480 | ≥32 |
B420CL | ≥290 | 420-520 | ≥28 |
B450CL | 320-450 | 450-570 | ≥28 |
B500CL | 380-500 | 500-620 | ≥26 |
B550CL | 450-570 | 550-680 | ≥24 |
B600CL | 500-620 | 600-750 | ≥22 |
B650CL | 550-680 | 650-800 | ≥20 |
Purpose: good cold forming performance, used for automobile rims and spokes
| Grade | Chemical composition% | |||||
| C | Si | Mn | P | S | Alt | |
B320L | ≤0.10 | ≤0.30 | ≤0.60 | ≤0.030 | ≤0.035 | ≥0.010 |
B420L | ≤0.12 | ≤0.50 | ≤1.50 | ≤0.030 | ≤0.025 | ≥0.010 |
B510L | ≤0.16 | ≤0.50 | ≤1.60 | ≤0.030 | ≤0.025 | ≥0.010 |
B510DL | ≤0.18 | ≤0.30 | ≤1.60 | ≤0.025 | ≤0.020 | ≥0.010 |
B550L | ≤0.16 | ≤0.50 | ≤1.60 | ≤0.030 | ≤0.025 | ≥0.010 |
B600L | ≤0.12 | ≤0.50 | ≤1.80 | ≤0.025 | ≤0.015 | ≥0.010 |
B650L | ≤0.12 | ≤0.50 | ≤1.90 | ≤0.025 | ≤0.015 | ≥0.015 |
B700L | ≤0.12 | ≤0.60 | ≤2.00 | ≤0.025 | ≤0.015 | ≥0.015 |
B750L | ≤0.12 | ≤0.60 | ≤2.10 | ≤0.025 | ≤0.015 | ≥0.015 |
| Grade | Mechanical properties | ||
| YS(MPa) | TS(MPa) | EL% | |
B320L | ≥215 | 320-420 | ≥27 |
B420L | ≥305 | 420-520 | ≥25 |
B510L | ≥355 | 510-630 | ≥24 |
B510DL | ≥355 | 510-630 | ≥24 |
B550L | ≥400 | 550-670 | ≥23 |
B600L | ≥550 | 600-760 | ≥16 |
B650L | ≥600 | 650-820 | ≥15 |
B700L | ≥650 | 700-880 | ≥14 |
B750L | ≥700 | 750-950 | ≥13 |
Purpose: For automobile girder and cross beam
| Grade | Chemical composition% | |||||
| C | Si | Mn | P | S | Alt | |
QStE340TM | ≤0.12 | ≤0.50 | ≤1.30 | ≤0.030 | ≤0.025 | ≥0.015 |
QStE380TM | ≤0.12 | ≤0.50 | ≤1.40 | ≤0.030 | ≤0.025 | ≥0.015 |
QStE420TM | ≤0.12 | ≤0.50 | ≤1.50 | ≤0.030 | ≤0.025 | ≥0.015 |
QStE460TM | ≤0.12 | ≤0.50 | ≤1.60 | ≤0.030 | ≤0.025 | ≥0.015 |
QStE500TM | ≤0.12 | ≤0.50 | ≤1.70 | ≤0.030 | ≤0.025 | ≥0.015 |
QStE550TM | ≤0.12 | ≤0.50 | ≤1.80 | ≤0.025 | ≤0.015 | ≥0.015 |
QStE600TM | ≤0.12 | ≤0.50 | ≤1.90 | ≤0.025 | ≤0.015 | ≥0.015 |
QStE650TM | ≤0.12 | ≤0.50 | ≤2.00 | ≤0.025 | ≤0.015 | ≥0.015 |
QStE700TM | ≤0.12 | ≤0.50 | ≤2.10 | ≤0.025 | ≤0.015 | ≥0.015 |
| Grade | Mechanical properties | ||
| YS(MPa) | TS(MPa) | EL% | |
QStE340TM | ≥340 | 420-540 | ≥25 |
QStE380TM | ≥380 | 450-590 | ≥23 |
QStE420TM | ≥420 | 480-620 | ≥21 |
QStE460TM | ≥460 | 520-670 | ≥19 |
QStE500TM | ≥500 | 550-700 | ≥17 |
QStE550TM | ≥550 | 600-760 | ≥16 |
QStE600TM | ≥600 | 650-820 | ≥15 |
QStE650TM | ≥650 | 700-880 | ≥14 |
QStE700TM | ≥700 | 750-950 | ≥13 |
Purpose: Hot rolled grain steel for cold deformation, used for structural parts such as automobile girders requiring good cold forming performance and high or high strength requirements.
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