316Nb S31640 - ASTM A959-2019

Grade	316Nb
USA UNS	S31640
Corresponding Standard	ASTM A959-2019 Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels
Classification	Austenitic Stainless Steel

316Nb Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Mo	N	More
Minimum Value	-	-	-	-	-	16	10	2	-	Nb：10C~1.10
Maximum Value	0.08	1	2	0.045	0.03	18	14	3	0.1	Nb：10C~1.10

• Unless otherwise indicated, a grade designation originally assigned by the American Iron and Steel Institute (AISI).

Approximate Comparison Table

China	United States		International Organization for Standardization		European Standard
ISC	ASTM	UNS	ISO	Numerical Grade	EN	Numerical Grade
S31678	316Nb (316Cb)	S31640	X6CrNiMoNb17-12-2	4580-316-40-I	X6CrNiMoNb17-12-2	1.4580

316Nb Corresponding Standards(Same grade name, different standards)

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