Engineered for conventional to mid-depth oilfield wells, 4130 grade drilling pipe delivers optimal strength, weldability, and cost efficiency - making it the reliable choice for diverse drilling operations.

• Balanced High Strength - Tensile strength ≥813 MPa, Yield strength ≥690 MPa - Provides reliable load-bearing capacity for medium-depth wells (≤3,000m) and standard pressure conditions (≤35 MPa), ensuring structural integrity during drilling.
• Superior Weldability - Low carbon content with chromium-molybdenum (Cr-Mo) alloying - Enables easy field welding (minimal preheat/post-weld heat treatment required) while maintaining toughness, ideal for on-site casing connections or repairs.
• Controlled Toughness & Ductility - Elongation ≥15% - Absorbs dynamic loads (e.g., bit vibration, pressure fluctuations) and resists brittle fracture, ensuring operational safety in varied well conditions.
• Cost-Effective Performance - Moderate alloy cost (Cr-Mo optimized) - Delivers premium-grade strength at a lower price point than 4140, balancing performance and budget for conventional to mid-range wells.
• Proven Reliability - Widely used in onshore/offshore conventional wells, water wells, and geothermal projects - Backed by decades of field performance in stable to moderately complex formations.

• Versatile Mid-Range Performance - Ideal for wells ≤3,000m with standard pressure/temperature, avoiding over-engineering of high-end grades (e.g., 4140).
• Weld-Friendly & Easy to Maintain - Simplifies field operations (e.g., welding, threading) without sacrificing strength, reducing downtime and costs.
• Better Than Carbon Steel - Outperforms basic carbon steels (e.g., 1541) in strength, fatigue resistance, and corrosion resistance (mild environments).

Suitable for mine blasting, water well drilling, geothermal well drilling, fore poling, and mining of coal and nonferrous metals.

• Stress Relief Annealing after Cold Working (+SR) (BKS)
• Normalizing (+N) (NBK)
• Quenching & Tempering (QT)