SAE J2340_201703定义并确立了七种材料的机械性能范围 可成型、焊接、组装的连续铸造高强度汽车钢板等级， 并在汽车制造过程中涂漆。指定用于识别零件的钢材等级应 基于零件要求（配置和强度）以及可成形性。材料选择应 还要考虑成形引起的应变量和冲击应变对强度的影响 在完成的部分中实现。这些钢可指定为热轧板、冷轧板、， 未涂层，或通过热浸、电镀或蒸汽沉积锌、铝和有机物进行涂层 通常通过线圈涂层涂覆的化合物。等级和强度等级是通过化学方法实现的 成分和特殊处理。并非所有强度和涂层类型的组合都可以用于商业用途 可获得的有关详细信息，请咨询您的钢材供应商。

SAE J2340_201703 defines and establishes mechanical property ranges for seven grades of continuously cast high strength automotive sheet steels that can be formed, welded, assembled, and painted in automotive manufacturing processes. The grade of steel specified for an identified part should be based on part requirements (configuration and strength) as well as formability. Material selection should also take into consideration the amount of strain induced by forming and the impact strain has on the strength achieved in the finished part. These steels can be specified as hot-rolled sheet, cold-reduced sheet, uncoated, or coated by hot dipping, electroplating, or vapor deposition of zinc, aluminum, and organic compounds normally applied by coil coating. The grades and strength levels are achieved through chemical composition and special processing. Not all combinations of strength and coating types may be commercially available. Consult your steel supplier for details.