汽车用冷镦钢 Cold heading quality steel for automobile | QSWRCH6A-22A Q10B21-10B38 QSWRCH20K-45K QML20Cr-40Cr QSCM415-440 | Φ5.5~26 | JIS 3507 ASTM A510 GB 6478 JIS 4053 Q/320582 JYG19-2019 | 制作汽车内外饰、车身、底盘、动力总成等部位的紧固件。 Make fasteners for automotive interior and exterior, bodywork, chassis and power assembly parts. |