汽车钢QSTE420TM 
冷成型热轧汽车结构钢板，本系列为细晶粒钢，具有良好冷成型性。用于要求良好的冷成型性能并有较高或高强度要求的汽车结构件。如牌号：QSTE420TM 　　执行标准：Q/BQB 310 （参考标准：SEW 092 ；DIN 17102 ；EN10025） 　　化学成分（熔炼分析）% 　　C : ≤0.12 　　Si : ≤0.35 　　Mn : ≤1.50 　　P : ≤0.03 　　S : ≤0.025 　　Ti : ≤0.22 　　Nb : ≤0.09 　　Ait: ≥0.01 　　试样测试（ 拉伸、弯曲、试样为横向 ；Mpa ）。 　　屈服：≥420 　　抗拉：480-620 　　延伸：≥21 
Cold forming automobile structure steel plate QSTE420TM QSTE380TM QSTE500TM 
Cold forming steel hot-rolled automobile structure steel plate, this series of fine grain steel and good cold formability. Used in good cold forming performance and has a high demand or high strength requirements of the automobile part. Such as brand: QSTE420TM executive standard: Q/BQB 310 (reference standards: the SEW 092, DIN 17102, EN10025) chemical composition (% of smelting) C: Si: 0.12 or less or less 0.35 Mn: 1.50 or less P: S: 0.03 or less 0.025 or less Ti: 0.22 or less Nb: 0.09 or less Ait: acuity 0.01 sample test (tensile, bending, samples for transverse; Mpa). Yield: 420 or higher tensile: 480-620 extension: p. 21