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Grade 309Cb
USA UNS S30940
Corresponding Standard ASTM A 314-2025
Standard Specification for Stainless Steel Billets and Bars for Forging
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 1 2 0.045 0.03 24 16
309Cb Corresponding Standards(Same grade name, different standards)
1 ASTM A 276-2006
309Cb S30940
2 ASTM A240/240M-2018
309Cb S30940
3 ASTM A276/A276M-2017
309Cb S30940
4 SAE J405-2018
309Cb S30940
5 ASTM A240/A240M-2020
309Cb S30940
6 ASTM A479/A479M-2018
309Cb S30940
7 ASTM A 314-2025
309Cb S30940

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