45#精密鋼管是一種經過冷拔或熱軋的高精密鋼管材料。45#精密鋼管內外壁無氧化層，光潔度高，高壓無泄漏，精度高，冷彎、擴口、壓扁無變形，無裂紋，主要用于生產氣缸、油缸等氣動或液壓元件產品。
45#精密鋼管規格表| 規格 | 規格 | 規格 |
| 12×1.5 | 73×4-4.5-5-6-7-8-9-10-12-15 | 219×30-40 |
| 14×1.5-2.5-3 | 76×4-4.5-5-6-7-8-9-10-12-14 | 245×8-10-14-17-20-22 |
| 16×1.5-2.5-4 | 83×4.5-5-10-12-14-16-18-20 | 245×25-28-30-34-40 |
| 18×2.3-4-5 | 89×4.5-8-10-12-14-16-18-20 | 273×7-9-12-15-18-20-25 |
| 20×2.5-3-5 | 95×4.5-6-8-10-12-14-16-20 | 273×30-35-38-40 |
| 24×2.5-3-4-5-6 | 102×4.5-5-6-7-8-10-12-14-16-20 | 299×8-12-16-20-24-28 |
| 25×2.5-3-4-5-6 | 108×4.5-5-6-7-8-10-12-14-18-20-22 | 299×30-32-36-38-40 |
| 28×3-3.5-4-5-6 | 114×4.5-5-6-7-8-10-12-14-18-20 | 325×8-12-14-18-38 |
| 32×3.5-4-5-6-8 | 121×4.5-5-6-7-8-10-12-14-16-20 | 325×28-32-34-38 |
| 34×4-5-6-8 | 127×4.5-5-6-7-8-10-12-14-16-20 | 351×10-16-20-25-40 |
| 36×3.5-5-6-8 | 133×4.5-6-8-12-14-16-18-20-25-30 | 355×6-18-20-25-30-40 |
| 38×4-5-6-7-8-9-10 | 140×5-6-7-8-9-10-12-14-16-20-22 | 377×8-12-15-20-24-28 |
| 39×3.5-5-8-10 | 146×4.5-6-8-12-14-16-18-20-25-30 | 377×30-37-40 |
| 42×3.5-4-5-6-7-8-9-10 | 152×4.5-6-8-12-14-16-18-20-25-30 | 402×10-15-20-25-30-35 |
| 45×3.5-4-5-6-7-8-9 | 159×4.5-6-10-12-14 | 406×10-20-25-28-35-40 |
| 48×3.5-4-5-6-7-8-9-10 | 159×16-18-20-22-25-30 | 426×10-12-14-16-20-25-30-35-40 |
| 51×3.5-4-5-6-7-8-9-10 | 168×8-10-12-14-20-25-30-35 | 450×10-12-14-16-20-25-34-40 |
| 56×3.5-4-5-6-7-8-9-10 | 180×8-12-16-25-30 | 480×10-12-14-16-18-20-25-30-40 |
| 57×3.5-5-6-7-8-9-10-12 | 180×32-34-38-40 | 500×10-12-14-16-20-25-34-40 |
| 60×3.5-4.5-5-6-7-8-9-12-14 | 194×6-8-12-16-20-25-30-40 | 510×10-12-14-16-20-25-34-40 |
| 63×3.5-4.5-5-6-7-8-9-10-12-14 | 203×6-7-10-15-20-25-30 | 530×10-12-14-16-18-20-30-40 |
| 68×4-4.5-5-6-7-8-9-10-12-14-16 | 203×32-36-40 |
|
| 70×4-4.5-5-6-7-8-9-10-12-15-16 | 219×6-8-12-16-18-20-25 |
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