800 N08800 - ASTM A688/A688M-2024

Grade	800
USA UNS	N08800
Corresponding Standard	ASTM A688/A688M-2024 Seamless and Welded Austenitic Stainless Steel Feedwater Heater Tubes
Classification	Austenitic Stainless Steel

800 Chemical Element Composition Content (%)

Component	Fe ^①	C	Si	Mn	P	S	Cr	Ni	Cu	Ti	Al
Minimum Value	39.5	-	-	-	-	-	19	30	-	0.15	0.15
Maximum Value	-	0.1	1	1.5	0.045	0.015	23	35	0.75	0.6	0.6

① Fe shall be determined arithmethically by difference of 100 minus the sum of the other specified elements.

800 Mechanical Properties

Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
≥520	≥205	≥30

1 Approximate Comparison Table Corrosion-Resistant Alloy

2 Approximate Comparison Table Austenitic Stainless Steel

Japan	United States	International Organization for Standardization		European Standard
JIS	UNS	ISO	Numerical Grade	EN	Numerical Grade
NCF800	N08800	X8NiCrAlTi32-21	4876-088-00-I	X8NiCrAlTi32-21	1.4959 1.4876

3 Approximate Comparison Table Austenitic Heat-Resistant Steel

United States		International Organization for Standardization	European Standard
ASTM	UNS	ISO	EN	Numerical Grade
800	N08800	X8NiCrAlTi32-21	X10NiCrAlTi32-21	1.4876

800 Corresponding Standards(Same grade name, different standards)

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