Mining tubes with Alloy steel grade
Straightness, Concentricity, Mechanical Properties can meet the requirement of DCDMA (USA), BS4019 (UK), METRIC (SWEDEN)
Size range: O.D.:6-95mm W.T.:1-10mm L:max12000mm
| Standard | Producton Method | Tube Size | Tolerance | ||||
| GB/T 9808-2008 | Hot rolled | OD | (+1.0%D) +0.65 (-0.5%D) -0.35 |
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| WT | ≤10 | (+15%S) +0.45 (-10%S) -0.35 |
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| 10 | (+12.5%S, -10%S) | ||||||
| Cold drawn | OD | ±0.50%D or ±0.20 | |||||
| WT | ±8%S or ±0.15 | ||||||
| Q(N)/ XJY118-2010 | Cold drawn | OD | OD | ±0.40%D or ±0.20 | |||
| WT | WT | ±7%S or ±0.15 | |||||
| Normal Sizes: | |||||||||
| Designation | Outside Diameter (mm) | Inside Diameter (mm) | |||||||
| Min | Max | Min | Max | ||||||
| A Wireline | 44.45 | 44.70 | 34.82 | 35.07 | |||||
| B Wireline | 55.55 | 55.90 | 45.95 | 46.30 | |||||
| N Wireline | 69.95 | 70.30 | 60.05 | 60.30 | |||||
| H Wireline | 88.90 | 89.38 | 77.62 | 78.10 | |||||
| P Wireline | 114.30 | 114.78 | 102.79 | 103.27 | |||||
| Mechanical Properties: | |||||||||
| Stee Grade | Tensile Strength Mpa min |
Yield Strength Mpa min |
Elongation % min |
HRC | Heat Treatment | ||||
| T600 | 790 | 600 | 14 | ~ | N | ||||
| T750 | 850 | 750 | 14 | 26-31 | QT | ||||
| T850 | 950 | 850 | 14 | 28-33 | QT | ||||
| Chemical composition | |||||||||
| Stee Grade | C | Si | Mn | P max | S max | Cu max | Cr | Mo | B |
| T600 (45MnMoB) |
0.43-0.48 | 0.17-0.37 | 1.05-1.35 | 0.02 | 0.015 | 0.20 | ~ | 0.20-0.25 | 0.001-0.005 |
| T750 (30CrMnSiA) |
0.28-0.34 | 0.90-1.20 | 0.80-1.10 | 0.02 | 0.015 | 0.20 | 0.8-1.1 | ~ | ~ |
| T850 4140 |
0.38-0.43 | 0.17-0.35 | 0.70-0.90 | 0.02 | 0.015 | 0.20 | 0.9-1.1 | 0.15-0.25 | ~ |
| Mechanical Properties: | |||||||||
| Steel Grade | Tensile Strength Mpa | Yield Point Mpa | Elongation % | Heat treatment | |||||
| Min | |||||||||
| ZT380 | 640 | 380 | 14 | Normlized | |||||
| ZT490 | 690 | 490 | 12 | Normlized | |||||
| ZT540 | 740 | 590 | 12 | Normlized | |||||
| ZT590 | 770 | 590 | 12 | Normlized | |||||
| ZT640 | 790 | 640 | 12 | QT | |||||
| ZT740 | 840 | 740 | 10 | QT | |||||
| T850 | 950 | 850 | 15 | QT | |||||
Applications:For Geological Drill underground for Oil and mineral, for mining
