Austenitic chromium-nickel stainless steel alloyed with nitrogen and rare earth metals for superior high-temperature performance.
Exceptional oxidation resistance at temperatures up to 1150°C (2100°F), especially under cyclic heating conditions.
High creep strength and structural stability for reliable service in demanding thermal environments.
Good weldability and formability with excellent resistance to combustion gases and carburizing atmospheres
253 MA (UNS S30815, EN 1.4835)
Product Overview
253 MA is an austenitic chromium-nickel stainless steel alloyed with nitrogen and rare earth metals (primarily cerium), designed for exceptional performance in high-temperature environments up to 1150°C (2100°F) . This advanced heat-resistant grade combines high creep strength with outstanding oxidation resistance, particularly under cyclic temperature conditions, making it the material of choice for demanding applications in metallurgical, petrochemical, and power generation industries
Chemical Composition
| Element | Content (%) | |
|---|---|---|
| Carbon (C) | 0.08 – 0.10 | |
| Silicon (Si) | 1.40 – 1.60 | |
| Manganese (Mn) | ≤ 0.80 | |
| Chromium (Cr) | 20.0 – 22.0 | |
| Nickel (Ni) | 10.0 – 12.0 | |
| Nitrogen (N) | 0.14 – 0.20 | |
| Cerium (Ce) | 0.03 – 0.08 | |
| Phosphorus (P) | ≤ 0.040 | |
| Sulfur (S) | ≤ 0.030 | |
| Iron (Fe) | Balance |
Mechanical Properties (Annealed)
| Property | Typical Value |
|---|---|
| Tensile Strength (Rm) | 650 – 850 MPa (94 – 123 ksi) |
| Yield Strength (Rp0.2) | ≥ 310 MPa (≥ 45 ksi) |
| Yield Strength (Rp1.0) | ≥ 350 MPa (≥ 51 ksi) |
| Elongation (A) | ≥ 40% |
| Hardness (Vickers) | ≈ 190 HV |
High-Temperature Mechanical Properties
| Temperature | Rp0.2 (MPa) | Rp1.0 (MPa) | Rm (MPa) |
|---|---|---|---|
| 100°C | ≥ 225 | ≥ 265 | ≥ 550 |
| 200°C | ≥ 189 | ≥ 215 | ≥ 475 |
| 300°C | ≥ 170 | ≥ 200 | ≥ 440 |
| 400°C | ≥ 160 | ≥ 190 | ≥ 425 |
| 500°C | ≥ 150 | ≥ 180 | ≥ 400 |
Available Forms & Specifications
| Product Form | Size Range | Specifications |
|---|---|---|
| Seamless Pipe & Tube | Up to 260 mm OD | ASTM A213, A312, EN 10297-2 |
| Welded Pipe & Tube | Custom sizes | ASTM A312 |
| Plate & Sheet | 1.5 – 50 mm thickness | ASTM A240, ASME SA240 |
| Bar & Rod | 3mm – 300mm diameter | ASTM A276, A479 |
| Wire | 0.1mm – 12mm diameter | ASTM A580 |
| Fittings | Custom configurations | ASTM A403 |
| Strip | Custom sizes | Available upon request |
Applications by Industry
| Industry | Applications |
|---|---|
| Metallurgical | Recuperators, radiation tubes, furnace rollers, kiln components, PCI lances for blast furnaces |
| Petrochemical | Styrene reactor tubes, EDC cracking tubes, convection tubes, pyrolysis vessels |
| Power Generation | Boiler nozzles, combustion chambers, fluidized-bed combustion plants |
| Cement Production | Kiln components, preheater cyclones, cyclone dip tubes, impact separators |
| Heat Treatment | Heat treatment trays, muffle furnaces, bell furnaces, annealing boxes |
| Waste Incineration | Furnace tubes for mud incineration plants, thermal treatment systems |
| Industrial Equipment | Expansion bellows, refractory anchors, conveyor belts, thermocouple protection tubes |
| Automotive | Exhaust manifolds, high-temperature components |
| Glass Industry | Tubes for glass manufacturing |
