Understanding 15X5M Steel: A High-Performance Alloy for Pressure Equipment

15X5M, also known by its Russian designation 15Х5М, is a chromium-molybdenum alloy steel widely used in the manufacturing of pressure vessels, heat exchangers, and piping components operating under high pressure and elevated temperatures. This steel is part of the GOST (Russian national standard) alloy classification system and is known for its excellent mechanical properties and high-temperature strength.

15X5M alloy seamless pipe fittings elbows and reducers

Chemical Composition and Properties

15X5M typically contains:

• Cr (Chromium): 4.0–6.0%
• Mo (Molybdenum): 0.4–0.6%
• C (Carbon): 0.12–0.18%
• Mn, Si, P, S: in small amounts

The high chromium content provides strong oxidation and corrosion resistance, while molybdenum enhances creep resistance under long-term stress at elevated temperatures.

Key properties:

Operating temperature: up to 580°C

Good weldability

High resistance to thermal fatigue

Excellent durability under pressure

Applications of 15X5M Alloy Steel

Due to its robustness and temperature resistance, 15X5M is commonly used in:

• Power plants (boilers, superheaters)
• Oil and gas pipelines
• Petrochemical reactors and vessels
• Seamless elbows, reducers, and pressure pipe fittings

It is especially favored in countries using Russian or CIS technical standards.

Haihao Group: Your Reliable Supplier of 15X5M Pipe Fittings

At Haihao Group, we manufacture a wide range of custom pipe fittings made from 15X5M, including:

• Seamless elbows (45°, 60°, 90°)
• Eccentric and concentric reducers
• High-pressure pipe components

Our team ensures strict quality control, including:

• Raw material analysis
• Dimensional and surface inspection
• Non-destructive testing (NDT)
• Heat treatment traceability

We proudly support global clients in industries such as oil & gas, petrochemical, and power generation, and we recently completed a large order of 15X5M seamless fittings for a Russian customer with outstanding client feedback.

15X5M is a proven and reliable alloy steel ideal for high-performance applications in extreme conditions. With Haihao Group’s production expertise and global service, we ensure you get the right fittings with the right material, delivered on time and certified to your project specifications.

Contact us today to learn more about our 15X5M alloy steel products and how we can support your projects. Email:sales@haihaogroup.com