阀门用低温钢铸件技术条件 铸件的力学性能
钢种 | 材料牌号 | 抗拉强度RmN/mm2 | 下屈服强度ReLN/mm2≥ | 断后伸长率A(%)≥ | 断面收缩率Z(%)≥ | 夏氏V形缺口冲击试验 | 供货状态 | ||||
试验温度℃ | 单个试样的最小值J | 两个试样的确最小值和三个试样最小平均值J | 正火℃ | 淬火℃ | 回火℃ | ||||||
碳钢 | LCA | 415~585 | 205 | 24 | 35 | -32 | 14 | 18 | 940~960 | — | 590~630 |
LCB | 450~620 | 240 | 24 | 35 | -46 | 14 | 18 | ||||
碳锰钢 | LCC | 485~655 | 275 | 22 | 35 | -46 | 16 | 20 | |||
碳钼钢 | LC1 | 450~620 | 240 | 24 | 35 | -59 | 14 | 18 | 840±10 | ||
2.5%镍钢 | LC2 | 485~655 | 275 | 24 | 35 | -73 | 16 | 20 | 840±10 | — | 590~630 |
镍铬钼钢 | LC2-1 | 725~895 | 550 | 18 | 30 | -73 | 34 | 41 | |||
3.5%镍钢 | LC3 | 485~655 | 275 | 24 | 35 | -101 | 16 | 20 | 860~900 | 600~640 | |
4.5%镍钢 | LC4 | 485~655 | 275 | 24 | 35 | -115 | 16 | 20 | 855~880 | ≥565 | |
9%镍钢 | LC9 | ≥585 | 515 | 20 | 30 | -196 | 20 | 27 | (790±10)~(840±10) | — | 565~635 |
12.5%铬镍钼钢 | CA6NM | 760~930 | 550 | 15 | 35 | -73 | 20 | 27 | — | ≥1010空冷 | — |
奥氏体不锈钢 | ZG03Cr18Ni10 | ≥392 | 177 | 25 | 32 | — | — | — | — | 1050~1100 | |
ZG08Cr18Ni9 | ≥441 | 196 | — | — | — | — | 1080~1130 | ||||
ZG12Cr18Ni9 | — | — | — | — | 1050~1100 | ||||||
ZG08Cr18Ni9Ti | — | — | — | — | 950~1050 | ||||||
ZG12Cr18Ni9Ti | — | — | — | — | |||||||
ZG08Cr18Ni12 Mo2Ti |
≥490 | 216 | 30 | 30 | — | — | — | — | 1100~1150 | ||
ZG12Cr18Ni12 Mo2Ti |
— | — | — | — | |||||||
CF3 | ≥485 | 206 | 35 | — | — | — | — | — | ≥1040 | ||
CF8 | — | — | — | — | — | ||||||
CF3M | 30 | — | — | — | — | — | |||||
CF8M | — | — | — | — | — | ||||||
CF3C | — | — | — | — | — | ≥1065 | |||||
注1:伸长率可根据0.2%变形法或载荷下0.5%伸长法确定。 注2:断面收缩率标距与断面收缩直径之比应为4:1. 注3:当ReL不能准确测出时,允许用规定非比例延伸强度Rp代替,但须注明“规定非比例延伸强度”。 |
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