合金管化學(xué)成分、機(jī)械性能?無錫高壓無縫鋼管廠豪鑫天供
合金管化學(xué)成分、機(jī)械性能 :編輯
標(biāo)準(zhǔn) |
鋼級 |
化學(xué)成分(%) |
||||||
C |
Mn |
Si |
V |
Cr |
Mo |
P.S |
||
GB5310 |
20G |
0.17~0.24 |
0.35~0.65 |
0.17~0.37 |
/ |
/ |
/ |
≤ 0.030 |
25MnG |
0.22~0.30 |
0.70~1.00 |
0.17~0.37 |
/ |
/ |
/ |
≤ 0.030 |
|
15MoG |
0.12~0.20 |
0.40~0.80 |
0.17~0.37 |
/ |
/ |
0.25~0.35 |
≤ 0.030 |
|
15CrMoG |
0.12~0.18 |
0.40~0.70 |
0.17~0.37 |
/ |
0.80~1.10 |
0.40~0.55 |
≤ 0.030 |
|
12Cr2MoG |
0.08~0.15 |
0.40~0.70 |
≤ 0.50 |
/ |
2.00~2.50 |
0.90~1.20 |
≤ 0.030 |
|
12Cr1MoVG |
0.08~0.15 |
0.40~0.70 |
0.17~0.37 |
0.15~0.30 |
0.90~1.20 |
0.25~0.35 |
≤ 0.030 |
|
機(jī)械性能 |
抗拉強(qiáng)度 (MPa) |
屈服強(qiáng)度 (MPa) |
伸長率(%) |
|||||
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 |
鋼管種類 |
鋼管尺寸
mm |
允許偏差 |
||
普通級 |
高級 |
|||
熱軋(擠)管 |
外徑
D |
≤159 |
+1.0%(最小值為+0.5mm) |
+0.75%(最小值為+0.3mm) |
>159 |
+1.0% |
+0.90% |
||
壁厚
S |
<3.5 |
+15%(最小值為+0.48mm)
-10% (最小值為-0.32mm) |
+1.0%(最小值為+0.2mm) |
|
3.5~20 |
+15%
-10% |
+10% |
||
>20 |
D<219 |
+10% |
+7.5% |
|
D≥219 |
+12.5%
-10.0% |
+10% |
||
冷拔(軋)管 |
外徑
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% |
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