N08811 - ASTM A479/A479M-2018

USA UNS	N08811
Corresponding Standard	ASTM A479/A479M-2018 Standard Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels
Classification	Austenitic Stainless Steel

Chemical Element Composition Content (%)

Component	Fe ^①	C	Si	Mn	P	S	Cr	Ni	Cu	Ti	Al	More
Minimum Value	39.5	0.06	-	-	-	-	19	30	-	0.25	0.25	（AI+Ti） 0.85~1.2
Maximum Value	-	0.1	1	1.5	0.045	0.015	23	35	0.75	0.6	0.6	（AI+Ti） 0.85~1.2

◎ New designations established in accordance with Practice E527 and SAE J1086 published jointly by ASTM and SAE. See ASTM DS-56C, available from ASTM Headquarters.

Mechanical Properties

condition	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW
All specifications	Annealing	≥450	≥170	in 2 in.[50 mm] or 4D ≥ 30	≤192

◎ d-diameter, t-thickness

1 Approximate Comparison Table Corrosion-Resistant Alloy

China		United States
GB	ISC	Commercial Grade	UNS
NS 1104	H 08811	Incoloy 800HT	N 08811

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

United States		Germany
Commercial Grade	UNS	DIN EN/DIN	W-Nr.
Incoloy 800HT	N08811	X8NiCrAlTi32-21	1.4959

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!