公差表
钢管类常用配合尺寸公差表
| 容许公差等级 直径 mm Φ | H | |||
|---|---|---|---|---|
| H7 | H8 | H9 | H10 | |
| 3mm | +0.010 0 |
+0.014 0 |
+0.025 0 |
+0.040 0 |
| 3mm-6mm | +0.012 0 |
+0.018 0 |
+0.030 0 |
+0.048 0 |
| 6mm-10mm | +0.015 0 |
+0.022 0 |
+0.036 0 |
+0.058 0 |
| 10mm-18mm | +0.018 0 |
+0.027 0 |
+0.043 0 |
+0.070 0 |
| 18mm-30mm | +0.021 0 |
+0.033 0 |
+0.052 0 |
+0.084 0 |
| 30mm-50mm | +0.025 0 |
+0.039 0 |
+0.062 0 |
+0.100 0 |
| 50mm-80mm | +0.030 0 |
+0.046 0 |
+0.074 0 |
+0.120 0 |
| 80mm-120mm | +0.035 0 |
+0.054 0 |
+0.087 0 |
+0.140 0 |
| 120mm-180mm | +0.040 0 |
+0.063 0 |
+0.100 0 |
+0.160 0 |
| 180mm-250mm | +0.046 0 |
+0.072 0 |
+0.115 0 |
+0.185 0 |
| 250mm-315mm | +0.052 0 |
+0.081 0 |
+0.130 0 |
+0.210 0 |
| 315mm-400mm | +0.057 0 |
+0.089 0 |
+0.140 0 |
+0.230 0 |
| 400mm-500mm | +0.063 0 |
+0.097 0 |
+0.155 0 |
+0.250 0 |
(单位)µ=0.001mm
产品描述
镗光无缝钢管乃内外冷抽后,经回火处理,可使其抗张强度达52kg/cm²以上,再经由精密机械加工,使其内径公差为H8-H9,表面粗糙度Ra0.2µm-0.8µm,并使油压缸寿命增长,油封不易磨损°本厂油压缸管内径最大可达1000mm,最长一次研磨可达13000mm
产品规格
(无缝钢管)机械构造用钢管化学成分与机械性能
| 规格明称 | 种类 | 记号 | 制造法 | 化学成分% | 热处理 | 引张试验 | 曲张试验 平试验 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C | Si | Mn | P | S | 引张强度(N/mm²) | 降伏点耐力(N/mm²) | 伸v(%) | Bend Angle | 内侧半径 | 平板间距离 | ||||||
| 11号试验片 12号试验片 纵方向 L | 5号试验片衡方向 V | |||||||||||||||
| 13A | STKM13A | S E |
0.25> | 0.35> | 0.30 | 0.90 |
0.040 Under |
0.040 Under |
380 | 220 | 30 | 25 | 90 | 6D | 2/3D | ||
| 13B | STKM13B | 450 | 310 | 20 | 15 | 90 | 6D | 3/4D | ||||||||
| 13C | STKM13C | 520 | 390 | 15 | 10 | - | - | - | ||||||||
管壁肉厚耐压计等公式
t = P. D. / 200 S
t = 肉厚(mm)
P = 最高压力(Kg/cm²)
D = 钢管内径(mm)
S = σ / 5 Kg / mm²
σ = 引张强度最低值(Kg/mm²)