S308 15 is a kind of heat-resistant austenitic stainless steel, which is specially designed for applications requiring high creep strength and good corrosion resistance. In many cases, it has the same high temperature characteristics as high alloy steel and nickel-based alloy. Due to the balance of its chemical composition, the steel has suitable comprehensive properties, extremely high oxidation resistance and scale formation in the temperature range of 850℃- 1 100℃. Extremely high creep resistance and creep fracture strength; It has good high temperature corrosion resistance and balanced brush corrosion resistance in most gas media; High yield strength and tensile strength at high temperature; Good formability and weldability, and sufficient machinability.

1. chemical composition of S308 15: C: 0.05-0. 10, S: ≤ 0.030, Si: 1.40-2.00, Cr: 20.00-22.00, Ni: 65438+.

Nitrogen: 0. 14-0.20, cerium: 0.03-0.08.

Second, S308 15 performance characteristics: 1, compared with 3 10S, 1Cr20Ni 14Si2, it has better performance, saves Ni and is cheaper. 2. It has high strength at 900℃. In air, it can be used to 1 150℃ without pressure, and it has excellent high-temperature oxidation resistance. 3. The short-term tensile strength at various temperatures is more than 20% higher than that of ordinary stainless steel (such as 304, 3 10S). 4, with high temperature long-term performance (creep performance, durability).

Three. S308 15 corresponding brands: german standard: 1.4835, x9crnisine21-kloc-0/-2, American standard: S308 15, f45,253ma.

S308 15 scope of application: it is widely used in sintering equipment, blast furnace equipment, steelmaking, smelting furnace and continuous casting equipment, rolling mill (heating furnace), heat treatment furnace and accessories, mineral processing equipment and cement production equipment. 253MA steel can be used for pressure-bearing occasions at 900℃ and non-pressure-bearing high-temperature parts with working temperature as high as 1 150℃.