合金管尺寸公差:
鋼管種類 |
外徑(D) |
壁厚(S) |
|
|
冷拔管 |
鋼管外徑(mm) |
允許偏差(mm) |
鋼管壁厚(mm) |
允許偏差(mm) |
>30~50 |
±0.3 |
>3~20 |
±10% |
合金管力學性能:
標準 |
牌號 |
抗拉強度(MPa) |
屈服強度(MPa) |
伸長率(%) |
硬度 |
GB3087 |
10 |
335~475 |
≥195 |
≥24 |
/ |
20 |
410~550 |
≥245 |
≥20 |
/ |
|
GB5310 |
20G |
410~550 |
≥245 |
≥24 |
/ |
20MnG |
≥415 |
≥240 |
≥22 |
/ |
|
25MnG |
≥485 |
≥275 |
≥20 |
/ |
|
15CrMoG |
440~640 |
≥235 |
≥21 |
/ |
|
12Cr2MoG |
450~600 |
≥280 |
≥20 |
/ |
|
12Cr1MoVG |
470~640 |
≥255 |
≥21 |
/ |
|
12Cr2MoWVTiB |
540~735 |
≥345 |
≥18 |
/ |
|
10Cr9Mo1VNb |
≥585 |
≥415 |
≥20 |
/ |
|
ASME SA210 |
SA210A-1 |
≥415 |
≥255 |
≥30 |
≤143HB |
SA210C |
≥485 |
≥275 |
≥30 |
≤179HB |
|
ASME SA213 |
SA213 T11 |
≥415 |
≥205 |
≥30 |
≤163HB |
SA213 T12 |
≥415 |
≥220 |
≥30 |
≤163HB |
|
SA213 T22 |
≥415 |
≥205 |
≥30 |
≤163HB |
|
SA213 T23 |
≥510 |
≥400 |
≥20 |
≤220HB |