您好!欢迎您访问无锡福临泰钢铁有限公司的官方网站!
钢管种类 |
钢管尺寸
mm |
允许偏差 | |||
普通级 |
高级 | ||||
热轧(挤)管 |
外径
D |
≤159 |
+1.0%(最小值为+0.5mm) |
+0.75%(最小值为+0.3mm) | |
>159 |
+1.0% |
+0.90% | |||
壁厚
S |
<3.5 |
+15%(最小值为+0.48mm)
-10% (最小值为-0.32mm) |
+1.0%(最小值为+0.2mm) | ||
3.5~20 |
+15%
-10% |
+10% | |||
>20 |
D<219 |
+10% |
+7.5% | ||
D≥219 |
+12.5%
-10.0% |
+10% | |||
冷拔(轧)管 |
外径
D |
≤30 |
+0.20mm |
+0.15mm | |
>30~50 |
+0.30mm |
+0.25mm | |||
>50 |
+0.8% |
+0.6% | |||
壁厚
S |
2~3 |
+12%
-10% |
+10% | ||
>3 |
+10% |
+7.5% |
标准 |
牌号/抗拉强度(Mpa) |
屈服强度(Mpa) |
伸长率(%) | |
5310-95 |
20G |
410~550 |
≥ 245 |
≥ 24 |
25MnG |
≥ 415 |
≥ 240 |
≥ 22 | |
15MoG |
450~600 |
≥ 270 |
≥ 22 | |
15CrMoG |
440~640 |
≥ 235 |
≥ 21 | |
12Cr2MoG |
450~600 |
≥ 280 |
≥ 20 | |
12Cr1MoVG |
470~640 |
≥ 255 |
≥ 21 |