309Cb S30940 - ASTM A554-2026

Grade	309Cb
USA UNS	S30940
Corresponding Standard	ASTM A554-2026 Welded Stainless Steel Mechanical Tubing
Classification	Austenitic Stainless Steel

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

Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW
Annealing	≥517	≥207	≥35	HB：≤192 HRB：≤90

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

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