Hot Rolled 253MA S30815 Stainless Steel Plate ASTM A240 Heat
Resistant Stainless Plate
253MA is a grade combining excellent service properties at high
temperatures with ease of fabrication. It resists oxidation at
temperatures up to 1150°C and can provide superior service to Grade
310 in carbon, nitrogen and sulphur containing atmospheres.
Another proprietary designation covering this grade is 2111HTR.
253MA contains fairly low nickel content, which gives it some
advantage in reducing sulphide atmospheres when compared to high
nickel alloys and to Grade 310. The inclusion of high silicon,
nitrogen and cerium contents gives the steel good oxide stability,
high elevated temperature strength and excellent resistance to
sigma phase precipitation.
The austenitic structure gives this grade excellent toughness, even
down to cryogenic temperatures.
Main characteristics of our 253 MA
- High creep strength
- Very good resistance to isothermal and, particularly, cyclic
- Very good resistance to combustion gases
- Good structural stability at high temperatures
- Good weldability
Typical compositional ranges for grade 253MA stainless steels are
given in table 1.
Table 1. Composition ranges for 253MA grade stainless steel
Typical mechanical properties for grade 253MA stainless steels are
given in table 2.
Table 2. Mechanical properties of 253MA grade stainless steel
|Tensile Str (MPa) min||Yield Str 0.2% Proof (MPa) min||Elongation (% in 50mm) min||Hardness|
|Rockwell B (HR B) max||Brinell (HB) max|
Oxidation - excellent resistance to air, at temperatures up to 1150°C. At
high temperatures the steel quickly forms a thin, highly adherent
and elastic oxide. This oxide gives good protection even under
Carburisation - Under oxidising conditions this grade can perform well, but
alloys with higher nickel content are preferred if the atmosphere
Sulphidation - good resistance to sulphur-bearing gases in an oxidising
atmosphere, even if only traces of oxygen are present. Reducing
gases prevent the protective oxide forming.
253MA has high strength at elevated temperatures so is often used
for structural and pressure-containing applications at temperatures
above about 500°C and up to about 900°C. Its strength at these
temperatures is higher than that of alternatives such as Grade 310.
253MA will become sensitised in the temperature range of 425-860°C;
this is not a problem for high temperature applications, but will
result in reduced aqueous corrosion resistance.
Typical applications include:
- Furnace components including burners, retorts, conveyor belts,
fans, jigs and baskets, rollers, walking beams, radiant tubes,
electric heater elements, refractory anchors, hoods, flues, grates,
- Petrochemical and refinery tube hangers.