30CrMnSiA Grade Drilling Pipe: High Strength, Corrosion Resistance
& Weldability for Demanding Oilfield Applications
The 30CrMnSiA-grade drilling pipe is a premium low-alloy
high-strength steel engineered for oilfield operations that
demand exceptional strength-to-weight ratio, superior corrosion
resistance, and reliable weldability. With its optimized chromium
(Cr) and manganese (Mn) content, precise heat treatment, and
balanced mechanical properties, this grade is ideal for
high-pressure environments, corrosive formations, and
applications requiring structural integrity under dynamic loads.
Why Choose 30CrMnSiA-Grade Drilling Pipes?
1. Corrosion-Resistant Strength – Outperforms standard carbon
steels in mildly aggressive fluids (brine, CO₂), ideal for
water injection, coastal, or gas wells with corrosion risks.
2. Weld-Friendly Design – Simplifies field welding and on-site
modifications without sacrificing structural integrity, reducing
operational costs.
3. High-Strength & Lightweight – Delivers 850+ MPa tensile
strength with lower weight than 4140, optimizing hoisting
efficiency in deep wells.
4. Balanced Cost & Performance – More affordable than 4140/4130
while providing superior corrosion resistance and weldability
for mid-range drilling challenges.
30CrMnSiA-Grade Drilling Pipes – Engineered for wells where
strength, corrosion resistance, and weldability matter.
Applications include fore poling (advance support), mine blasting, water well
drilling, geothermal well drilling, and coal/nonferrous metal
mining.
Chemical Composition
| 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 | | |
Mechanical Properties
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 |
Delivery Condition:
1. Stress Relief Annealing after Cold Working (+SR) (BKS)
2. Normalizing (+N) (NBK)
3. Quenching & Tempering (QT)
FAQ:
1. Can you provide a sample to check the quality?
We can provide free sample with same or similar sizes for you to
check tube quality.
You need to in charge of Express costs.
2. How about your production capacity?
3000 tons/Month.
3. What are your terms of payment?
30%TT in advance, Balance to be paid before shipment.
4. Where is your factory?
Zhangjiagang city, 1.5 hours away from Shanghai.
5. How can I get the quotation A.S.A.P?
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
6. How about the minimum order quantity?
Normally for one size above 1 ton.
Welcome to contact us! Thanks.
