253 MA (UNS S30815 / W.Nr. 1.4835)

253 MA (UNS S30815 / W.Nr. 1.4835) was developed over 30 years ago when the need for a heat resistant stainless steel with high strength, while maintaining good oxidation resistance was present in the industry. The lean 11% nickel content of RA 253 MA is a key contributor to being cost effective and stable. With the addition of rare earth elements, RA 253 MA still performs well at temperatures up to 2000°F (1093°C), similar to that of 310 stainless steel.

Equivalent Grades

253 MAS30815X9CrNiNCe 21-11-21.4835

Chemical Composition, %

253 MA0.05-0.121.4-2.5≤1.0≤0.045≤0.01520.0-22.010.0-12.00.03-0.080.12-0.20Bal

Typical Physical and Mechanical Properties (RT, Annealed)

Density, g/cm3Melting Point, ℃Tensile Strength, MPaYield Strength, MPaELongation, %Hardness, HB

Available Products and Specifications

Rod, Bar, Wire and ForgingsASTM A479, ASTM B276
Plate, Sheet and StripASTM A240, ASTM B480
Pipe and TubeASTM A358, ASTM A312, ASTM A409, ASTM A813, ASTM A814, ASTM B690
Welding Product
OthersASTM B366


  • Oxidation resistance to 2000°F (1093°C)
  • Good resistance to sulfidation
  • Superior strength at elevated temperatures
  • Good resistance to high temperature abrasion


  • Burners, Boiler Nozzles
  • Petrochemical and refinery tube hangers
  • Heat exchangers
  • Expansion bellow
  • Stack dampers