大量批发swrm6冷拉钢圆钢 冷拉六角钢 A3冷拉圆钢 A3冷拉圆钢 

SWRM代表低碳钢盘条，根据化学成分不同分为 SWRM6、SWRM8、SWRM10、SWRM12、SWRM15、SWRM17、SWRM20几种牌号，属于日本JIS-G3505标准

牌号                 化学成分    ％ 
           C      Si        Mn        P          S 
SWRM6  ≤0.08  ≤0.03  ≤0.60  ≤0.035  ≤0.035 
SWRM8  ≤0.10  ≤0.03  ≤0.60  ≤0.035  ≤0.035 
SWRM10  0.08～0.13  ≤0.03  0.30～0.60  ≤0.035  ≤0.035 
SWRM12  0.10～0.15  ≤0.03  0.30～0.60  ≤0.035  ≤0.035 
SWRM15  0.13～0.18  ≤0.03  0.30～0.60  ≤0.035  ≤0.035 
SWRM17  0.15～0.20  ≤0.03  0.30～0.60  ≤0.035  ≤0.035 
SWRM20  0.18～0.23  ≤0.03  0.30～0.60  ≤0.035  ≤0.035 
    注：SWRM6～SWRM20为JIS G3505中的牌号。脱氧方式为压盖钢。