| 液压和气动缸筒用精密无缝钢管 |
液压和气动缸筒用
精密无缝钢管
规格：缸径φ30-50mm
壁厚2-50mm
材料：20#45#16Mn 27SiMn
标准：GB8713-88 |
|
|
| 品种 |
| |
| 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 |
0.3-0.1 |
H8-H10 |
0.4-1.6 |
| 冷拔 |
30-250 |
≤12M |
H8-H10 |
0.8-1.6 |
| 珩磨 |
40-500 |
≤12M |
1000 |
H8-H9 |
0.4-0.8 |
| 滚压 |
40-400 |
≤7M |
H8 |
0.4 |
|
| |
| 力学性能 |
| |
| 钢种 |
项目 |
冷拔（轧）管 |
金切管 |
| 20 |
抗拉强度бbN/mm2
伸长率δ5%
| ≥510
≥5 |
≥390
≥20 |
| 45 |
抗拉强度бbN/mm2
伸长率δ5% |
≥647
≥4 |
≥590
≥4 |
| 16Mn |
抗拉强度бbN/mm2
伸长率δ5% |
≥640
≥10 |
|
| 27iMn |
抗拉强度бbN/mm2
伸长率δ5% |
≥840
≥7.5 |
|
|
| |
| 尺寸公差 |
| |
|
内径尺寸 |
内径偏差 |
壁厚偏差 |
|
H8 |
H9 |
H10 |
| 30 |
+0.33
0 |
+0.052
0 |
+0.084
0 |
±5% |
| ＞30-50 |
0.039
0 |
+0.062
0 |
+0.100
0 |
| ＞50-80 |
+0.046
0 |
+0.074
0 |
+0.120
0 |
| ＞80-120 |
+0.054
0 |
+0.087
0 |
+0.140
0 |
| ＞120-180 |
+0.063
0 |
+0.100
0 |
+0.160
0 |
| ＞180-250 |
+0.072
0 |
+0.115
0 |
+0.185
0 |
| ＞250-315 |
+0.081
0 |
+0.130
0 |
+0.210
0 |
| ＞315-400 |
+0.089
0 |
+0.140
0 |
+0.230
0 |
|
| |
| |
