0635-8780999 
13616351811 王少青
聊城市开发区武夷山路与辽河路向北188米路东大德管业
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20#45#精密无缝钢管力学性能 |
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钢种 |
力学性能 |
冷拔（轧）管 |
金切管 |
|
20# |
抗拉强度σbN/mm2 伸长率δ5% |
≥510 |
≥390 |
|
≥5 |
≥20 |
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45# |
≥647 |
≥590 |
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|
≥4 |
≥4 |
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加工形式 |
缸径 |
长度 |
直线度 |
尺寸精度 |
内孔粗糙度 |
|
冷轧 |
30-100 |
≤12M |
0.3-1.0 |
H8-H10 |
0.4-1.6 |
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冷拔 |
30-250 |
≤12M |
H8-H10 |
0.8-1.6 |
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|
珩磨 |
40-500 |
≤12M |
1000 |
H8-H9 |
0.4-0.8 |
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滚压 |
40-400 |
≤7M |
H8 |
0.4 |
尺寸公差
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尺寸公差（壁厚偏差±5%） |
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内径尺寸 |
H8 |
H9 |
H10 |
|
30 |
+0.033 0 |
+0.052 0 |
+0.084 0 |
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＞30-50 |
+0.039 0 |
+0.062 0 |
+0.100 0 |
|
＞50-80 |
+0.046 0 |
+0.074 0 |
+0.120 0 |
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＞80-120 |
+0.054 0 |
+0.087 0 |
+0.140 0 |
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＞120-180 |
+0.063 0 |
+0.100 0 |
+0.160 0 |
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＞180-250 |
+0.072 0 |
+0.115 0 |
+0.185 0 |
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＞250-315 |
+0.081 0 |
+0.130 0 |
+0.210 0 |
|
＞315-400 |
+0.089 0 |
+0.140 0 |
+0.230 0 |