253MA Stainless Steel Seamless Pipe
253MA Stainless Steel Seamless Pipe
253MA (UNS S30815) is a nickel-saving, heat-resistant austenitic stainless steel developed from the 21Cr-11Ni grade by incorporating nitrogen (N) alloying and the rare-earth element cerium (Ce). It was designed to deliver superior high-temperature performance while reducing reliance on expensive nickel, thereby offering a more cost-effective solution.
Developed specifically for extreme high-temperature applications, 253MA represents a breakthrough in austenitic stainless steel technology. By combining rare-earth elements with nitrogen stabilization, the alloy delivers outstanding performance at temperatures up to 1150°C (2102°F). Its unique composition makes it an indispensable material for power generation, petrochemical processing, and industrial furnace applications.
Key Performance Advantages of 253MA Seamless Pipes：
01
Excellent High-Temperature Strength and Creep Resistance
The yield strength of this material is approximately 20–30% higher than that of 310S, and roughly double that of conventional 310/309 stainless steels.
02
Superior Oxidation and Carburization Resistance
High chromium and silicon content promotes the formation of a dense Cr₂O₃-SiO₂-CeO₂ composite oxide layer on the surface at high temperatures, effectively inhibiting carbon atom penetration and sulfidation corrosion in carbon- or sulfur-bearing atmospheres.
03
Excellent Resistance to Sigma (σ) Phase Embrittlement
253MA maintains superior microstructural stability and toughness during prolonged high-temperature exposure, reducing the risk of failure caused by the precipitation of embrittling phases.
04
Good weldability and workability
It offers excellent cold and hot formability and is compatible with various welding processes, such as manual arc welding and argon arc welding; stable weld quality can typically be achieved without the need for preheating or post-weld annealing.
Implementation Standards and Reference for Dimensions and Prices
| Equivalent Grades | UNS S30815, EN 1.4835 (X9CrNiSiNCe21-11-2) |
| Standards | ASTM A312/A213/A269 (Seamless Pipe/Tube) |
| Product Forms | Seamless pipe, precision tubing |
| Supply Condition | Solution annealed + pickled (white finish), or bright annealed |
Reference Size & Price Special specification: 38 × 2 mm × 2150 mm (for reference only) - 65 RMB (9.56 USD)/kg, tax-inclusive
Common Specification: 89 mm × 4.5 mm
Precision Tubing: Precision tubing is available for applications requiring stricter tolerances on outer diameter and wall thickness.
Price Fluctuation: Prices may vary by approximately 8–15 USD depending on manufacturing complexity and current market conditions.
Please note that available dimensions may vary depending on production standards. Non-standard sizes can usually be custom-made to meet specific customer requirements.
If you have any questions, don't hesitate to get in touch with us for a detailed quote.
chemical composition
| Cr (Chromium) | 20.0-22.0 |
| Ni (Nickel) | 10.0-12.0 |
| Si (Silicon) | 1.4-2.0 |
| N (Nitrogen) | 0.14-0.20 |
| Ce (Cerium) | 0.03-0.08 |
| C (Carbon) | ≤0.08 |
Physical Properties
Density Approx. 7.8 g/cm³
Melting range 1370 – 1420°C
Thermal conductivity (room temperature): Approx. 15 – 20 W/(m·K)
Electrical resistivity (room temperature): Approx. 0.85 – 0.90 Ω·mm²/m
Mechanical properties
| Elongation | ≥ 35 - 45% |
| Hardness | ≤217 HB |
| Yield Strength (0.2%) | ≥ 310 - 420 MPa |
| Tensile Strength | 600-850 MPa |
FAQ
Q: What are the differences between 253MA and 310S, and how should I choose?
A: High-temperature strength: 253MA generally exhibits higher creep strength and yield strength than 310S at elevated temperatures; consequently, thinner wall thicknesses can be used for high-temperature structural components to reduce weight. Oxidation resistance: 253MA offers superior oxide scale adhesion under cyclic oxidation conditions. Cost-effectiveness: 253MA has a lower nickel content, resulting in generally lower raw material costs. Selection advice: If your project demands high-temperature strength and cost-efficiency, 253MA is the more economical choice.
Q: What is the minimum order quantity (MOQ), and how is the price calculated?
A: MOQ: The standard MOQ is typically 100 kg; MOQs for non-standard specifications will be higher. Pricing: The final price depends on raw material costs (nickel, chromium, etc.), pipe diameter, wall thickness, length, and order quantity. We recommend providing specific specifications to obtain a real-time quote.
Lork Group
Marketing Operations Department
Email: layla@lorkgroup.com
WhatsApp: +86 199 3707 5488
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