1.4462

1.4462 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.

1.4462 Chemical 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

1.4462Physical 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

1.4462Mechanical properties：

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

1.4462Alloy 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