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USA UNS S44400
ASTM
Specification or Grade		 444
Corresponding Standard ASTM A276/A276M-2017
Standard Specification for Stainless Steel Bars and Shapes
Classification Ferritic Stainless Steel
Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Mo N More
Minimum Value - - - - - 17.5 - 1.75 - Ti+Cb：0.20+4×(C+N) ~ 0.80
Maximum Value 0.025 1 1 0.04 0.03 19.5 1 2.5 0.035
Mechanical Properties
Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Reduction of Area
ψ
% 		Hardness
HBW
Hot rolled Annealing (A) ≥415 ≥310 ≥20 ≥45 ≤217
Cold rolled Annealing (A) ≥415 ≥310 ≥16 ≥45 ≤217
Approximate Comparison Table
China Japan United States International Organization for Standardization France European Standard Sweden
ISC JIS ASTM UNS ISO Numerical Grade NF EN/NF EN Numerical Grade SS
S11972 SUS 444 444 S44400 X2CrMoTi18-2 4521-444-00-I Z3CDT18-02 X2CrMoTi18-2 1.4521 2326

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