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Product Details
Geological Drilling Pipe (YB/T5052-1993)
| Model NO.: | YB/T5052-1993 |
|---|
Product Description
The geological drilling pipes are used for geological drilling.
| OD | allowed tolerance | WT | allowed tolerance |
| <50mm | ±0.40mm | ≤5mm | +12%S -10%S |
| 50~100mm | ±1%D | >5mm | ±10%S |
| >100mm | ±1.00mm |
| ID allowed tolerance | WT allowed tolerance |
| +1.2%D -0.8%D | ±10%S |
Mechanical Properties:
| Steel grade | Yield strength σ0.2 Mpa | Tensile strength σb Mpa | Elongation 5 % |
| min | |||
| DZ40 | 400 | 650 | 15 |
| DZ50 | 500 | 700 | 13 |
| DZ55 | 550 | 750 | 13 |
| DZ60 | 600 | 780 | 13 |
| STM-R780 | 520(*) | 780 | 15(**) |
| Note(*|)yield strength is Rt0.5 (**)The sample width for tensile test is 19mm ,gauge length is 50mm | |||
Chemical composition:
| Grade | Designation | %Chemical Composition | |||||||||||
| C | Si | Mn | P | S | Cu | Ni | Cr | Mo | V | B | |||
| Max | |||||||||||||
| DZ40 | 37Mn5 | 0.33~ 0.39 | 0.15~0.35 | 1.20~1.45 | 0.025 | 0.020 | 0.20 | 0.20 | ≤0.15 | ≤0.10 | | | |
| 50Mn | 0.48~ 0.56 | 0.17~0.37 | 0.70~1.00 | 0.035 | 0.035 | 0.25 | 0.30 | ≤0.25 | | | | ||
| DZ50 DZ55 | 45Mn2 | 0.42~ 0.49 | 0.17~0.37 | 1.40~1.80 | 0.035 | 0.035 | 0.25 | 0.30 | ≤0.30 | ≤0.15 | | | |
| 36Mn2V | 0.35~ 0.40 | 0.20~0.40 | 1.40~1.65 | 0.025 | 0.015 | 0.20 | 0.20 | ≤0.15 | ≤0.10 | 0.10~0.16 | | ||
| 42MnMo7 | 0.40~ 0.46 | 0.15~0.35 | 1.60~1.85 | 0.025 | 0.015 | 0.20 | 0.20 | ≤0.15 | 0.15~0.25 | | | ||
| STM— 7 80 | 36Mn2V | 0.35~ 0.40 | 0.20~0.40 | 1.40~1.65 | 0.025 | 0.015 | 0.20 | 0.20 | ≤0.15 | ≤0.10 | 0.10~0.16 | | |
| 42MnMo7 | 0.40~ 0.46 | 0.15~0.35 | 1.60~1.85 | 0.025 | 0.015 | 0.20 | 0.20 | ≤0.15 | 0.15~0.25 | | | ||
| DZ60 | 45MnMoB | 0.41~ 0.49 | 0.17~0.37 | 0.90~1.20 | 0.030 | 0.030 | 0.25 | 0.25 | ≤0.25 | 0.20~0.30 | ≤0.08 | 0.001~ 0.005 | |
| 25CrMnMo | 0.23~ 0.28 | 0.17~0.37 | 0.90~1.10 | 0.020 | 0.010 | 0.20 | 0.20 | 0.60~ 0.80 | 0.15~0.25 | | | ||
