X2CrNiMoN22-5-3

X2CrNiMoN22-5-3 is an austenitic-ferritic duplex stainless steel with excellent corrosion resistance and strength characteristics. Compared with SUS 316L and  SUS 317L, it has better local corrosion resistance and can be used in complete chemical equipment and seawater desalination equipment.

X2CrNiMoN22-5-3Chemical composition：

	C	Si	Mn	P	S	Ni	Cr	Mo	N
Min	–	–	–	–	–	4.5	2	2.5	0.08
Max	0.03	1	2	0.03	0.02	6.5	23	3.5	0.2

X2CrNiMoN22-5-3Physical properties：

Specific heat(J/kg･K)		460
Resistivity(μΩ･cm)		87.0
Thermal conductivity(W/m･K)		13.9
Average coefficient of thermal expansion(10-6/℃)	20–100℃	12.7
	20–200℃	13.1
	20–300℃	13.5
	20–400℃	13.8
Longitudinal modulus of elasticity(MPa)		19.5 x  10^4
Ferromagnetic		Yes
Melting point(℃)		1420-1465

X2CrNiMoN22-5-3Mechanical properties：

0.2%Yield strength(N/mm2)	Tensile strength (N/mm2)	Elongation (%)	Hardness
≧ 450	≧ 655	≧ 25	(Hv)	(HB)
			―	―

X2CrNiMoN22-5-3Alloy properties：

Corrosion Resistance:

Steel	Critical point corrosion temperature(℃)	Critical crevice corrosion temperature (℃)
S31803	50	25
SUS 316L	10	0℃hereinafter

Acid Corrosion Resistance:

Steel	Test conditions
	Sulfuric acid 80°C						Hydrochloric acid 80°C
	5%	10%	20%	40%	60%	80%	0.1%	1%	2%	3%
S31803	< 0.1	0.1	3.3	250.5	263.1	90.4	< 0.1	< 0.1	19	51.5
SUS316L	1.1	2.9	20.1	291.3	72.0	11.1	< 0.1	2.5	6.7	13.5