国外阀门材料常用技术标准 需切口韧性试验的管道部件用碳钢和低合金钢锻件、化学成分要求
元素 |
成分,(重量)% |
LF1 |
LF2 |
LF3 |
LF5 |
LF6 |
LF9 |
LF787 |
碳 C≤ |
0.30 |
0.30 |
0.20 |
0.30 |
0.22 |
0.20 |
0.07 |
锰 Mn |
0.60-1.35 |
0.60-1.35 |
≤0.90 |
0.60-1.35 |
1.15-1.50 |
0.40-1.06 |
0.40-0.70 |
磷 P≤ |
0.035 |
0.035 |
0.035 |
0.035 |
0.025 |
0.035 |
0.025 |
硫 S≤ |
0.040 |
0.040 |
0.040 |
0.040 |
0.025 |
0.040 |
0.025 |
硅 SiA |
0.15-0.30 |
0.15-0.30 |
0.20-0.35 |
0.20-0.35 |
0.15-0.30 |
… |
≤0.40 |
镍 Ni |
≤0.40B |
≤0.40B |
3.3-3.7 |
1.0-2.0 |
≤0.40B |
1.60-2.24 |
0.70-1.00 |
铬 Cr |
≤0.30B,C |
≤0.30B,C |
≤0.30C |
≤0.30C |
≤0.30B,C |
≤0.30C |
0.60-0.90 |
钼 Mo |
≤0.12B,C |
≤0.12B,C |
≤0.12C |
≤0.12C |
≤0.12B,C |
≤0.12C |
0.15-0.25 |
铜 Cu |
≤0.40B |
≤0.40B |
≤0.40 |
≤0.40C |
≤0.40B |
0.75-1.25 |
1.00-1.30 |
铌 Nb |
≤0.02D |
≤0.02D |
≤0.02 |
≤0.02 |
≤0.02 |
≤0.02 |
≥0.02 |
钒 V |
≤0.08 |
≤0.08 |
≤0.03 |
≤0.03 |
0.04-0.11 |
≤0.03 |
≤0.03 |
氮 N |
… |
… |
… |
… |
0.01-0.030 |
… |
… |
|