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.
CHINA GB/T 20878-2007 S11972
AMERICA ASTM A240-15a S44400，444
JAPAN JIS G4305:2005[TJC STEEL] SUS444
GERMANY DIN EN 10088-2:1995 X2CrMoTi18-2
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
~0.80 Ti、Nb、Zr or any combination thereof:
8(C+N) ~0.80 Ti:[0.15+4(C+N)]
(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.
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.
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