444,SUS444, 1.4521 High Corrosion Resistant Ferritic Stainless Steel- SCALE STEEL.

​444 stainless steel is an ultra-low carbon and nitrogen, 18% chromium and 2% molybdenum, high corrosion resistance ferritic stainless steel, [SCALE 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[SCALE 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[SCALE 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 [SCALE 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 [SCALE 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.