EN10305-1 Seamless Steel Casing Tube Oil Well Pipe 30CrMnSiA Steel Drill Rod with Low Residual Hoop Stresses

​​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:​​

•  

  Water injection wells, coastal oilfields, and gas storage sites

•  

  Wells with ​​moderate corrosion risks​​ and ​​structural welding needs​​

•  

  Projects balancing ​​strength, cost, and field adaptability​​

​​Upgrade Path:​​

•  

  ​​Need extreme pressure?​​ Step up to 4140.

•  

  ​​Budget-first shallow well?​​ 1541 gets the job done.

Chemical Composition

Mechanical Properties

Delivery Condition​​

1.+SR (BKS) — Stress Relief Annealing after Cold Working​

2.+N (NBK) — Normalizing​

3.QT — Quenching & Tempering

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.