Hengqiao (Shanghai) International Trading Co., Ltd.
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Bake hardening automobile steel sheet has low yield strength during stamping, which is favorable for forming; In the baking process after the subsequent painting, the strength is further improved to achieve the relatively high strength in use, especially the anti sag performance.
Typical Composition (wt. %) of Cold Rolled, Bake Hardenable Variants：
Chemical composition | C | Si | Mn | P | S | Al | Cu | ||
WSS-M1A367-A21 CR180B2 | ≤ 0.06 | ≤ 0.50 | ≤ 0.70 | ≤ 0.060 | ≤ 0.025 | ≥ 0.015 | ≤ 0.20 | ||
WSS-M1A367-A22 CR210B2 | ≤ 0.08 | ≤ 0.50 | ≤ 0.70 | ≤ 0.085 | ≤ 0.025 | ≥ 0.015 | ≤ 0.20 | ||
WSS-M1A367-A23 CR240B2 | ≤ 0.10 | ≤ 0.50 | ≤ 1.00 | ≤ 0.100 | ≤ 0.030 | ≥ 0.015 | ≤ 0.20 | ||
WSS-M1A367-A24 CR270B2 | ≤ 0.11 | ≤ 0.50 | ≤ 1.00 | ≤ 0.110 | ≤ 0.030 | ≥ 0.015 | ≤ 0.20 | ||
WSS-M1A367-A25 CR300B2 | ≤ 0.11 | ≤ 0.50 | ≤ 1.00 | ≤ 0.110 | ≤ 0.030 | ≥ 0.015 | ≤ 0.20 | ||
Mechanical Properties for Cold Rolled, Bake Hardenable Variants：
The material | YS,MPA(min) | YS,MPA(max) | TS, MPa (min) | TS, MPa (max) | ASTM Total Elongation, % (min) | ||||||||
WSS-M1A367-A21 CR180B2 | 180 | 240 | 300 | 370 | 35 | ||||||||
WSS-M1A367-A22 CR210B2 | 210 | 270 | 320 | 400 | 33 | ||||||||
WSS-M1A367-A23 CR240B2 | 240 | 300 | 340 | 440 | 30 | ||||||||
WSS-M1A367-A24 CR270B2 | 270 | 330 | 360 | 460 | 28 | ||||||||
WSS-M1A367-A25 CR300B2 | 300 | 360 | 390 | 490 | 26 | ||||||||
The material | EN Total Elongation, % (min) | JIS Total Elongation, % (min) | ravg (min) | r0 (min) | n value (min) | BHI,Mpa(min) | ||||||||
WSS-M1A367-A21 CR180B2 | 33 | 39 | 1.3 | 1.1 | 0.19 | 30 | ||||||||
WSS-M1A367-A22 CR210B2 | 31 | 37 | 1.1 | 1.1 | 0.17 | 30 | ||||||||
WSS-M1A367-A23 CR240B2 | 28 | 34 | 1.1 | 1 | 0.17 | 30 | ||||||||
WSS-M1A367-A24 CR270B2 | 26 | 32 | 0.9 | 0.9 | 0.15 | 30 | ||||||||
WSS-M1A367-A25 CR300B2 | 24 | 30 | 0.9 | 0.9 | 0.14 | 30 | ||||||||