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USA UNS S44600
ASTM
Specification or Grade		 446
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 N
Minimum Value - - - - - 23 - -
Maximum Value 0.2 1 1.5 0.04 0.03 27 0.75 0.25
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) ≥450 ≥275 ≥20 ≥45 ≤219
Cold rolled Annealing (A) ≥450 ≥275 ≥16 ≥45 ≤219
1 Approximate Comparison Table Ferritic Heat-Resistant Steel
China Taiwan, China Japan South Korea United States
GB ISC CNS JIS KS ASTM UNS
16Cr25N
(2Cr25N) 		S12550 SUH 446 SUS 446 STR 446 446 S44600
2 Approximate Comparison Table Ferritic Stainless Steel
China Japan United States International Organization for Standardization European Standard
ISC JIS ASTM UNS ISO Numerical Grade EN Numerical Grade
S12550 SUH446 446 S44600 X15CrN26 4749-446-00-I X18CrN28 1.4749
3 Approximate Comparison Table Ferritic Stainless Steel
United States France European Standard
ASTM UNS NF EN/NF EN Numerical Grade
446 S44600 X15CrN26 X18CrN28 1.4749

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