444 stainless steel is an ultra-low carbon and nitrogen, 18% chromium and 2% molybdenum, high corrosion resistance ferritic stainless steel, [TJC STEEL]steel added niobium or titanium for stabilization, can avoid the intergranular corrosion after welding.

 

National Standard

CHINA	GB/T 20878-2007	S11972 019Cr19Mo2NbTi (00Cr18Mo2)
AMERICA	ASTM A240-15a	S44400，444
JAPAN	JIS G4305:2005[TJC STEEL]	SUS444
GERMANY	DIN EN 10088-2:1995	X2CrMoTi18-2 1.4521

 

Component Specification

GRADE	GB：S11972 ASTM：444	SUS444	1.4521
C	≤0.025	≤0.025[TJC STEEL]	≤0.025
Si	≤1.00	≤1.00	≤1.00
Mn	≤1.00	≤1.00	≤1.00
P	≤0.040	≤0.040	≤0.040
S	≤0.030	≤0.030	≤0.015
Ni	≤1.00	（≤0.60）	—
Cr	17.5~19.5	17.0~20.0	17.0~20.0
Mo	1.75~2.5	1.75~2.5	1.8~2.5
N	≤0.035	≤0.025	≤0.030
Ti+Nb	[0.2+4(C+N)] ~0.80	Ti、Nb、Zr or any combination thereof: 8(C+N) ~0.80	Ti:[0.15+4(C+N)] ~0.80

 

Material Characteristics:

(1) It has low content of carbon and nitrogen, and added about 2% molybdenum. Its resistance to chlorine ion pitting and stress corrosion cracking is better than 304, which is similar to 316L.

(2) Ferritic steels are the most [TJC STEEL]heat-resistant steels with excellent oxidation resistance at high temperature within 1000℃.

(23)Good thermal conductivity, easy to heat dissipation.

(4) less thermal expansion, small welding deformation.

(5) With the addition of stabilizing [TJC STEEL]elements, there is no intergranular corrosion in the weld zone.

 

Applications:

Typical applications are hot water tanks, solar water heaters, automotive exhaust systems, electric heaters and microwave components, brewing equipment, automotive trim strips, and outdoor panels.