30CrMnSiA Grade Drilling Pipe – The Robust, Corrosion-Ready
Workhorse for Challenging Wells
Tough enough for hostile environments yet weldable when it
matters most, 30CrMnSiA-grade drilling pipe combines
high-strength microseconds with built-in corrosion resistance and
field-ready weldability – making it the go-to choice for wells
where reliability meets real-world demands.
Why Drillers Trust 30CrMnSiA
1. High-Strength Core - (850+ MPa Tensile) Delivers
rock-solid performance in medium-high pressure wells (35–50
MPa) and critical structural zones (e.g., deep casing),
outperforming standard carbon steels without the premium cost of
super-alloys.
2. Built-In Corrosion Shield - 0.8–1.1% Chromium forms a
passive oxide layer, resisting brine, CO₂, and mildly acidic
fluids – ideal for water injection wells, coastal platforms,
and shallow gas fields where standard carbon steels fail early.
3. Weld First, Drill Later - Low carbon equivalent (Ceq)
enables low-preheat, no-PWHT field welding – perfect for
on-site casing connections, emergency repairs, or custom
configurations without sacrificing joint integrity.
4. Balanced for Real-World Use - 14%+ elongation absorbs
drill bit vibrations, pressure pulses, and dynamic loads ,
preventing cracks in cyclic-stress scenarios (e.g., long-term
production wells). Lighter than 4140 yet stronger than 1541,
optimizing tripping efficiency in deep wells without
overengineering.
5. The Smart Middle Ground - More corrosion-resistant than
4130/4140 (no extra coating needed for mild environments) .
Easier to weld than 4140 (lower Ceq = fewer preheat headaches) .
Tougher than 1541 (850+ MPa tensile vs. 800–950 MPa baseline)
Perfect For:
1. Water injection wells, coastal oilfields, and gas storage sites
2. Wells with moderate corrosion risks and structural welding
needs
3. Projects balancing strength, cost, and field adaptability
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.
