产品详情
无磁钻铤采用自主研发的低碳不锈钢，执行AP规范及SYIT5144标准，可对螺纹进行冷滚压处理，可加工双台肩螺纹及其它规格的特殊螺纹。
无磁钻铤的尺寸规格
| 钻铤编号 | 外径 | 内径 | 长度 mm | 合肩倒角直径 mm | 弯曲强度比 | ||
| mm | in | mm | in | ||||
| NC23-31 | 79.4 | 31/8 | 31.8 | 11/4 | 9150 | 76.2 | 2.57:1 |
| NC26-35 | 88.9 | 31/2 | 38.1 | 11/2 | 9150 | 82.9 | 2.42:1 |
| NC31-41 | 104.8 | 41/8 | 50.8 | 2 | 9150或9450 | 100.4 | 2.43:1 |
| NC35-47 | 120.7 | 43/4 | 50.8 | 2 | 9150或9450 | 114.7 | 2.58:1 |
| NC38-50 | 127.0 | 5 | 57.2 | 21/4 | 9150或9450 | 121.0 | 2.38:1 |
| NC44-60 | 152.4 | 6 | 57.2 | 21/4 | 9150或9450 | 144.5 | 2.49:1 |
| NC44-60 | 152.4 | 6 | 71.4 | 213/16 | 9150或9450 | 144.5 | 2.84:1 |
| NC44-62 | 158.8 | 61/4 | 57.2 | 21/4 | 9150或9450 | 149.2 | 2.91:1 |
| NC46-62 | 158.8 | 61/4 | 71.4 | 213/16 | 9150或9450 | 150.0 | 2.63:1 |
| NC46-65 | 165.1 | 61/2 | 57.2 | 21/4 | 9150或9450 | 154.8 | 2.76:1 |
| NC46-65 | 165.1 | 61/2 | 71.4 | 213/16 | 9150或9450 | 154.8 | 3.05:1 |
| NC46-67 | 171.4 | 63/4 | 57.2 | 21/4 | 9150或9450 | 159.5 | 3.18:1 |
| NC50-67 | 171.4 | 63/4 | 71.4 | 213/16 | 9150或9450 | 159.5 | 2.37:1 |
| NC50-70 | 177.8 | 7 | 57.2 | 21/4 | 9150或9450 | 164.7 | 2.54:1 |
| NC50-70 | 177.8 | 7 | 71.4 | 213/16 | 9150或9450 | 164.7 | 2.73:1 |
| NC50-72 | 184.2 | 71/4 | 71.4 | 213/16 | 9150或9450 | 169.5 | 3.12:1 |
| NC56-77 | 196.8 | 73/4 | 71.4 | 213/16 | 9150或9450 | 185.3 | 2.70:1 |
| NC56-80 | 203.2 | 8 | 71.4 | 213/16 | 9150或9450 | 190.1 | 3.02:1 |
| 65/8REG | 209.6 | 81/4 | 71.4 | 213/16 | 9150或9450 | 195.7 | 2.93:1 |
| NC61-90 | 228.6 | 9 | 71.4 | 213/16 | 9150或9450 | 212.7 | 3.17:1 |
| 75/8REG | 241.3 | 91/2 | 76.2 | 3 | 9150或9450 | 223.8 | 2.81:1 |
| NC70-97 | 247.6 | 93/4 | 76.2 | 3 | 9150或9450 | 232.6 | 2.57:1 |
| NC70-100 | 254.0 | 10 | 76.2 | 3 | 9150或9450 | 237.3 | 2.81:1 |
| 85/8REG | 279.4 | 11 | 76.2 | 3 | 9150或9450 | 266.7 | 2.84:1 |
无磁钻铤的主要公差尺寸
| 外径范围 | 外径 | 内径 | 长度 mm | 台肩倒角直径 mm | |
| mm | in | ||||
| ≤889 | ≤31/2 | 1.2 | +1.60 | +152.4 | ±0.4 |
| >88.9-114.3 | >31/2-4112 | 1.6 | |||
| >114.3-1397 | >41/2-51/2 | 2 | |||
| >139.7-165.1 | >51/2-61/2 | 320 | |||
| >165.1-2159 | >61/2-81/2 | 4 | |||
| >215.9-241.3 | >81/2-91/2 | 4.8 | |||
| >2413 | >91/2 | 640 | |||
无磁钻铤的力学性能
| 外径范围OD | 屈服强度 Rp0.2 MPa |
抗拉强度T Rm Mpa |
伸长率 A % |
||||||||
| mm | n | ||||||||||
| 88.9~174.6 | 31/8~63/4 | ≥758 | ≥827 | ≥18 | |||||||
| 177.8~279.4 | 7~11 | ≥689 | ≥758 | ≥20 | |||||||
磁性能
磁场=(1×105/4π)A/mMPS=(1×105/4π)A/m
相对磁导率μr<1.010Average:μr<1.010
磁场梯度：△B≤0.05μTMagnetic Field Gradient:△B≤0.05μT
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