阀门用堆焊焊条有半铁素体高铬钢和铬镍硅钼两大类,主要用于工作温度低于600℃的高压阀门的密封面堆焊。
牌号\化学成分 | C | Cr | Ni | Mo | Nb | Mn | Si | W | 其它 | 硬度 |
D502 | ≤0.15 | 10-16 | ≤2.50 | ≥40 | ||||||
D507 | ≤0.15 | 10-16 | ≤2.50 | ≥40 | ||||||
D507Mo | ≤0.20 | 10-16 | ≤6.0 | ≤2.50 | ≤2.0 | ≤2.50 | ≥37 | |||
D507MoNb | ≤0.15 | 10-16 | ≤2.50 | ≤0.50 | ≤2.50 | ≥37 | ||||
D512 | ≤0.25 | 10-16 | ≤5.0 | ≥45 | ||||||
D516 | ≤0.25 | 12-14 | 6.0-8.0 | ≤1.0 | ≥38 | |||||
D517 | ≤0.25 | 10-16 | ≤5.0 | ≥45 | ||||||
D547 | ≤0.18 | 15-18 | 7.0-9.0 | 0.6-2.0 | 4.8-6.4 | 270-320 HB | ||||
D547Mo | ≤0.18 | 14-21 | 6.5-12 | 3.5-7.0 | 0.5-1.2 | 0.6-5.0 | 3.8-6.5 | ≤2.50 | ≥37 | |
D557 | ≤0.20 | 18-20 | 7.0-1.0 | 2.0-3.0 | 5.0-7.0 | ≥37 | ||||
D577 | ≤1.10 | 12-18 | ≤6.0 | ≤4.0 | 12-18 | ≤2.0 | ≤3.0 | ≥28 | ||
D582 | ≤0.10 | ≥18.0 | ≥18.0 |