1.4438

HuaNickel 1.4438 is a molybdenum-containing austenitic stainless steel with improved corrosion resistance over HuaNickel 1.4301/1.4301L and 316/1.4404 stainless steels. The increased chromium, nickel and molybdenum content on 1.4404 stainless steel improves chloride pitting and general corrosion. By controlling nitrogen addition, HuaNickel 1.4438 can generally meet the mechanical properties of 317 straight grade while maintaining low carbon content.

1.4438Chemical composition：

	Ni	Cr	Mo	Mn	Si	C	N	S	P	Fe
Min	11	18	3	–	–	–	–	–	–	Bal
Max	15	20	4	2	0.75	0.03	0.1	0.03	0.45

1.4438Physical properties：

Density	Melting point	Poisson’s ratio	Resistivity
0.285 lb/in3	2540 – 2630°F	0.3	475 Ohm-circ mil/ft

1.4438Mechanical properties：

Ultimate tensile strength, ksi	70
0.2% yield strength, ksi	30
Elongation, %	40
Hardness max., Brinell	217

1.4438Stainless steel characteristics：

Improved general and localized corrosion to HuaNickel 1.4301/1.4301L and 316/1.4404 stainless steels

Good formability

Good weldability

1.4438Uses of stainless steel：

FGD system、Chemical Process Containers、Petrochemical、Pulp、Power generation condensers

Relevant standards：

ASTM: A 240 ASME: SA-240