EN10305-1 Standard 45MnMoB Grade Seamless Steel Oil Well Drill Pipe with 30-139.7mm OD Range
The 45MnMoB-grade drilling pipe is a high-performance alloy steel solution engineered for oilfield operations that demand exceptional strength, superior wear resistance, and enhanced impact toughness. With its unique chemical composition (notably high manganese and molybdenum content) and tailored mechanical properties, this grade stands out as an optimal choice for extreme drilling environments where standard grades fall short.
- Built for Extremes - Delivers unmatched strength and wear resistance for high-load, high-wear drilling scenarios where standard grades fail.
- Alloy-Optimized - Manganese and molybdenum enhance hardenability, high-temperature stability, and fatigue life - critical for modern deep drilling.
- Tailored Hardness - Optional QT treatment pushes surface hardness to 32 HRC, combating abrasion and extending service intervals.
- Reliable in Harsh Fluids - Low sulfur/phosphorus and fine microstructure resist corrosion and erosion in aggressive well environments.
Applications include fore poling (advance support), mine blasting, water well drilling, geothermal well drilling, and coal/nonferrous metal mining.
| Steel Grade | C | Si | Mn | P | S | Cr | Mo | B |
|---|---|---|---|---|---|---|---|---|
| 4130 | 0.28-0.33 | 0.15-0.35 | 0.40-0.60 | ≤0.040 | ≤0.040 | 0.80-1.10 | 0.15-0.25 | |
| 4140 | 0.38-0.43 | 0.15-0.35 | 0.75-1.00 | ≤0.040 | ≤0.040 | 0.80-1.10 | 0.15-0.25 | |
| 45MnMoB | 0.43-0.48 | 0.17-0.37 | 1.05-1.35 | ≤0.020 | ≤0.015 | 0.20-0.25 | 0.001-0.005 | |
| 1541 | 0.36-0.44 | - | 1.35-1.65 | ≤0.040 | ≤0.050 | |||
| 30CrMnSiA | 0.28-0.34 | 0.90-1.20 | 0.80-1.10 | ≤0.020 | ≤0.015 | 0.80-1.10 |
| Steel Grade | Deliver Condition | Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation (%) | Hardness (HRC) |
|---|---|---|---|---|---|
| 4130 | + SR | ≥813 | ≥690 | ≥15% | ≥24 |
| 4140 | QT | ≥950 | ≥850 | ≥14% | 28 - 33 |
| 45MnMoB | + N | ≥790 | ≥600 | ≥14% | - |
| 1541 | + SR | ≥813 | ≥690 | ≥15% | ≥24 |
| 30CrMnSiA | QT | ≥850 | ≥750 | ≥14% | 26 - 31 |
- Stress Relief Annealing after Cold Working (+SR) (BKS)
- Normalizing (+N) (NBK)
- Quenching & Tempering (QT)
We can provide free sample with same or similar sizes for you to check tube quality. You need to in charge of Express costs.
3000 tons/Month.
30%TT in advance, Balance to be paid before shipment.
Zhangjiagang city, 1.5 hours away from Shanghai.
Please send us an inquiry with full details as following, quotation will sent to you A.S.A.P:
1). Tube Standard
2). Steel Grade
3). Tube Size and Size Tolerance
4). Tube length
5). Quantity
6). If any special requirements
Normally for one size above 1 ton.
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