What is SA213 T92 material

What is SA213 T92 material?

SA213 T92 Material Analysis
1. Material Type and Standard
Alloy steel type: SA213 T92 is a ferritic alloy seamless steel pipe in ASTM standard (SA213), designed for high temperature and high pressure environments, and belongs to modified 9Cr-1Mo steel. It is a modified 9Cr-1Mo steel, enhanced by the addition of tungsten (W) and vanadium (V).
2. Chemical composition
Core elements:
Chromium (Cr): 8.5%-9.5% to enhance oxidation and corrosion resistance;
Molybdenum (Mo): 0.30%-0.60% to enhance high temperature strength;
Tungsten (W): 1.50%-2.00%, optimising creep resistance;
Vanadium (V): 0.15%-0.25%, grain refinement and enhanced toughness.
3 Performance characteristics
High temperature performance:
Temperature range: long-term use temperature up to 600-650 ℃, short-term tolerance temperature up to 700 ℃;
Creep resistance: resistance to deformation at high temperatures is better than traditional chromium-molybdenum steel (such as T22, T91).
Mechanical properties:
Tensile strength ≥ 620MPa, yield strength ≥ 440MPa, elongation ≥ 20%
4. Application areas
Power industry: used in supercritical / ultra-supercritical thermal power unit boiler heating surface pipe (such as superheater, reheater), the main steam pipe;
Petrochemical industry: high-temperature and high-pressure reactors, heat exchangers and oil and gas pipelines;
Nuclear power equipment: some high temperature resistant parts.
5. Manufacturing and inspection
Production process: hot rolling or cold drawing forming, combined with normalising + tempering heat treatment to optimise organisational properties;
Testing standards: chemical composition analysis, high-temperature tensile test, ultrasonic flaw detection and other tests, in line with ASTM SA213 specification.
Summary
SA213 T92 is a high-end boiler steel alloyed with high chromium, molybdenum and tungsten composite alloying, taking into account high-temperature strength, oxidation resistance and creep resistance, and it is the core material for supercritical generating units and pipelines in extreme working conditions. Its performance is better than traditional T91, T22 and other materials, but the manufacturing cost is higher, need to match the strict welding and heat treatment process.