N08811 - ASTM A182/A182M-2025

USA UNS	N08811
ASTM Specification or Grade	FNIC11
Corresponding Standard	ASTM A182/A182M-2025 Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service
Classification	Austenitic Stainless Steel
Properties	Corrosion Resistance

Chemical Element Composition Content (%)

Component	Fe	C	Si	Mn	P	S	Cr	Ni	Cu	Ti	Al	More
Minimum Value	39.5	0.06	-	-	-	-	19	30	-	0.25	0.25	Al + Ti：0.85~1.20
Maximum Value	-	0.1	1	1.5	0.04	0.015	23	35	0.75	0.6	0.6	Al + Ti：0.85~1.20

Mechanical Properties

Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %
≥450	≥170	≥30

1 Approximate Comparison Table Corrosion-Resistant Alloy

2 Approximate Comparison Table Austenitic Stainless Steel

United States	International Organization for Standardization		European Standard
UNS	ISO	Numerical Grade	Numerical Grade
N08811	X8NiCrAlTi33-21	4959-088-11-U	1.4959

3 Approximate Comparison Table Corrosion-Resistant Alloy

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