牌号 | 化学成分a(质量分数) % | |||||||||
C | Si | Mn | P | S | Alt | Nba | Va | Tia | Moa | |
BS600MC、BS600MCK2 BS600MCJ4、BS600MCK4 | ≤0.12 | ≤0.50 | ≤1.90 | ≤0.020 | ≤0.010 | ≥0.015 | ≤0.09 | ≤0.20 | ≤0.22 | ≤0.50 |
BS650MC、BS650MCK2 BS650MCJ4、BS650MCK4 | ≤0.12 | ≤0.50 | ≤2.00 | ≤0.020 | ≤0.010 | ≥0.015 | ≤0.09 | ≤0.20 | ≤0.22 | ≤0.50 |
BS700MC、BS700MCK2 BS700MCJ4、BS700MCK4 | ≤0.12 | ≤0.60 | ≤2.10 | ≤0.025 | ≤0.010 | ≥0.015 | ≤0.09 | ≤0.20 | ≤0.22 | ≤0.50 |
a由供方选择,可添加 Nb、V、Ti、Mo 等其他合金元素,但应满足:Nb+V+Ti≤0.22%。 |
牌号 | 拉伸试验a L0 = 5.65 S 0 | 180°弯曲试验a,cD-弯曲压头直径a-试样厚度 | V 型冲击试验a | ||||
上屈服强度b ReH / MPa | 抗拉强度Rm / MPa | 断后伸长率A / % | 质量等级 | 温度 | 冲击吸收能量 KV2 | ||
BS600MC BS600MCK2 BS600MCJ4 BS600MCK4 | ≥600 | ≥650 | ≥15 | D=2a | - | - | - |
K2 | -20℃ | ≥40J | |||||
J4 | -40℃ | ≥27J | |||||
K4 | -40℃ | ≥40J | |||||
BS650MCdBS650MCK2dBS650MCJ4dBS650MCK4d | ≥650 | ≥700 | ≥15 | D=2a | - | - | - |
K2 | -20℃ | ≥40J | |||||
J4 | -40℃ | ≥27J | |||||
K4 | -40℃ | ≥40J | |||||
BS700MCdBS700MCK2dBS700MCJ4dBS700MCK4d | ≥700 | 750~950 | ≥15 | D=2a | - | - | - |
K2 | -20℃ | ≥40J | |||||
J4 | -40℃ | ≥27J | |||||
K4 | -40℃ | ≥40J | |||||
a拉伸试验和弯曲试验规定值适用于横向试样;冲击试验规定值适用于纵向试样。 b屈服现象不明显时屈服强度用R 。 p0.2 c弯曲试样宽度b≥20mm,仲裁试验时试样宽度为 20mm。 d当厚度t>8.0mm 时,允许规定的屈服强度下限降低 20MPa。 |
钢板及钢带的牌号、公称厚度、表面处理方式、交货状态、产品类别及用途如表
牌号 | 公称厚度mm | 表面处理方式 | 交货状态 | 产品类别 | 用途 |
BS600MC、BS600MCK2 BS600MCJ4、BS600MCK4 BS650MC、BS650MCK2 BS650MCJ4、BS650MCK4 BS700MC、BS700MCK2 BS700MCJ4、BS700MCK4 | 1.5~14.0 | 轧制表面 | 控轧 | 热轧钢带热轧钢板 热轧平整钢带 | 起重机、混凝土泵车等工程机械用 |
控轧+回火 | 热轧热处理钢板 |