X9CrNiSiNCe21-11-2

HuaNickel RA X9CrNiSiNCe21-11-2 is a poor austenitic heat-resistant alloy with high strength and excellent oxidation resistance. RA 253 MA achieves its heat resistance through advanced control of microalloy additives. Rare earth metals are combined with silicon for superior oxidation resistance up to 2000°F. Nitrogen, carbon, and, to some extent, rare earth and alkali metal oxides, combined, provide creep rupture strength comparable to that of nickel-based alloys. HuaNickel RA 253 MA is only fairly resistant to carburizing. 309 is a little bit in this regard. The addition of nitrogen enhances austenite stability in RA 253 MA, thereby delaying the formation of embryomorphic sigma phases.

X9CrNiSiNCe21-11-2Chemical composition：

	Fe	Cr	Ni	Mn	Si	C	Ce	S	P
Min	Bal	20	10	–	1.4	0.05	0.14	–
Max		22	12	0.8	2	0.1	0.2	0.03	0.04

X9CrNiSiNCe21-11-2Physical properties：

Density	0.282 lb/in3
Melting point	2500 – 2610°F

X9CrNiSiNCe21-11-2Mechanical properties：

Temperature, °F	68	1292	1562	1832
Tensile strength, ksi	102	56.4	24.8	10.8
Yield strength, ksi	51.6	23	14.6	6.2
Elongation, 2%	51	44	–	–

X9CrNiSiNCe21-11-2Stainless steel characteristics：

Excellent oxidation resistance through 2000°F

High creep rupture strength

Excellent thermal shock resistanceandGood weldability

X9CrNiSiNCe21-11-2Uses of stainless steel：

Pulverized coal burner in a power boiler\Petrochemical, refinery and steam superheater tubular hangers

Radiant heating tubes for steel and aluminum annealing\Thermal oxidizers, expansion bellows, furnace fans, dampers, fluidized bed combustion chambers, cyclones, rotary kilns and calciners

Relevant standards：

ASME: SA-240, SA-479, SA-312, SA-249

ASTM: A 240, A 276, A 312, A 358, A 409, A 473, A 479, A 813, A 814