BISTHERM 253 MA
Austenitic heat resisting grade with excellent oxidation and creep resistance. Best employed between 850 and 1100c. Commonly used for oil industry equipment, conveyor belts, refactory anchors, expansion bellows, radiant tubes, rotary kilns, exhaust manifolds, and power generation. A common feature of BISTHERM 253MA high temperature steels is that they are designed primarily fo use at temperatures exceeding ~550C, i.e. in the temperature range where creep strength as a rule is the dimensioning factor and where HT corrosion occurs. Optimising steels for high temperatures has meant that their resistance to aqueous corrosion has been limited. All steels are austenitic, resulting in relatively high creep strength values.