国内阀门材料常用技术标准 可锻铸铁件、黑心可锻铸铁和珠光体可锻铸铁的机械性能
牌 号 |
试样直径 d mm |
抗拉强度σb屈服强度σ |
伸长率 δ% (Lo=3d) |
硬度 HB |
||
A | B | N/mm2(kgf/mm2) | ||||
不小于 | ||||||
KTH300-06 | — | 12或15 | 300(30.6) | — | 6 |
不大于 150 |
KTH330-08 | 330(33.7) | — | 8 | |||
KTH350-10 | — | 350(35.7) | 200(20.4) | 10 | ||
KTH370-12 | 370(37.7) | — | 12 | |||
KTZ450-06 | — | 450(45.9) | 270(27.5) | 6 | 150~200 | |
KTZ550-04 | — | 550(56.1) | 340(34.7) | 4 | 180~230 | |
KTZ650-02 | — | 650(66.3) | 430(43.9) | 2 | 210~260 | |
KTZ2700-02 | — | 700(71.4) | 530(54.1) | 2 | 240~290 |
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