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|
牌号 |
化学成份（%） | ||||||||
|
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Mo |
Cu | |
|
20R |
≤0.22 |
0.15-0.30 |
0.35-0.80 |
≤0.035 |
≤0.035 |
≤0.030 |
≤0.030 |
|
≤0.030 |
|
16MnR |
≤0.20 |
0.20-0.60 |
1.20-1.60 |
≤0.035 |
≤0.035 |
≤0.030 |
≤0.030 |
|
≤0.030 |
|
15MnVR |
≤0.18 |
0.20-0.60 |
1.20-1.60 |
≤0.035 |
≤0.035 |
≤0.030 |
≤0.030 |
V 0.04-0.12 |
≤0.030 |
|
18MnMoNbR |
≤0.23 |
0.17-0.37 |
1.35-1.65 |
≤0.035 |
≤0.035 |
≤0.030 |
≤0.030 |
Mo 0.45-0.65 Nb 0.025-0.050 |
≤0.030 |
外径216mm壁厚8mm精密无缝钢管每米重量是多少？