253MA is a heat-resistant austenitic stainless steel, which is intended for applications requiring high creep strength and excellent corrosion resistance. Its operating temperature is 850~ 1 100℃.
The chemical composition of 253MA is balanced, which makes the steel have the most suitable induction in the temperature range of 850℃- 1 100℃, and the oxidation resistance is extremely high, and the scale temperature is as high as 1 150℃. Extremely high creep resistance and creep fracture strength; Excellent high-temperature corrosion resistance and balanced brush corrosion resistance in most gas media; High yield strength and tensile strength at high temperature; Outstanding formability and weldability, and satisfactory machinability. ?
253MA stainless steel is rich in rare earth metals besides alloying elements chromium and nickel, and then its oxidation resistance is obviously improved. Nitrogen is added to improve the creep function and transform the steel into complete austenite. Although the contents of chromium and nickel are relatively low, this stainless steel has the same high temperature characteristics as high alloy steel and nickel-based alloy in many cases.
Usage ratio:
253MA 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 resources 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℃. ?
Chemical composition:?
C 0.05-0. 10？
Mn≤0.80？
P≤0.040？
S≤0.030？
Si 1.40-2.00？
Cr 20.00-22.00？
Ni 10.00- 12.00?
Mo-?
N 0. 14-0.20
CE: 0.03-0.08