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

Trademark	GB	GOST	ASTM	UNS	DIN	W.Nr.	NF	BS	JIS	SS
253 MA	–	–	–	S30815	X9CrNiNCe 21-11-2	1.4835	–	–	–	–

Chemical Composition, %

Alloy	C	Si	Mn	P	S	Cr	Ni	Ce	N	Fe
253 MA	0.05-0.12	1.4-2.5	≤1.0	≤0.045	≤0.015	20.0-22.0	10.0-12.0	0.03-0.08	0.12-0.20	Bal

Typical Physical and Mechanical Properties (RT, Annealed)

Density, g/cm3	Melting Point, ℃	Tensile Strength, MPa	Yield Strength, MPa	ELongation, %	Hardness, HB
7.8	1110-1210	552-758	≥230	≥35	/

Available Products and Specifications

Rod, Bar, Wire and Forgings	ASTM A479, ASTM B276
Plate, Sheet and Strip	ASTM A240, ASTM B480
Pipe and Tube	ASTM A358, ASTM A312, ASTM A409, ASTM A813, ASTM A814, ASTM B690
Welding Product	–
Others	ASTM B366