309Cb S30940 - ASTM A240/A240M-2020

Grade	309Cb
USA UNS	S30940
Corresponding Standard	ASTM A240/A240M-2020 Chromium and Chromium-Nickel Stainless Steel Plate, Sheet and Strip for Pressure Vessels and General Applications
Classification	Austenitic Stainless Steel
Properties	Corrosion Resistance

309Cb Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	More
Minimum Value	-	-	-	-	-	22	12	Nb:10C~1.10
Maximum Value	0.08	0.75	2	0.045	0.03	24	16	Nb:10C~1.10

309Cb Mechanical Properties

Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW
≥515	≥205	≥40	≤217

309Cb Corresponding Standards(Same grade name, different standards)

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