酸洗則是一種后續(xù)工序,用來提高表面質量的
化學成分及力學性能
牌號 化學成分% 屈服點Mpa 抗拉強度Mpa 伸長率% 硬度HPB 彎曲試驗
C Si Mn P S
SPCC ≤0.12 ≤0.05 ≤0.05 ≤0.035 ≤0.035 - ≥270 ≥20 -
SPCD ≤0.10 ≤0.03 ≤0.45 ≤0.030 ≤0.035 - ≥270 ≥28 -
SPCE ≤0.08 ≤0.03 ≤0.40 ≤0.025 ≤0.030 - ≥270 ≥35 -
SPCC1B ≤0.12 ≤0.05 ≤0.05 ≤0.035 ≤0.035 - - - 85
SPCC4B 0.08-0.13 ≤0.05 0.35-0.65 ≤0.035 ≤0.035 - - - 65-80