Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
B
C
Cb
Cr
Mn
Mo
Ni
P
S
Si
V
0.003-0.009
0.06-0.15
0.75-1.25
14.0-16.0
5.5-7.0
0.80-1.20
9.0-11.0
<=0.045
<=0.030
0.2-1.0
0.15-0.40
More data from ASTM A959:2011
From the standard
Other composition limitsfrom Table 1 and its footnotes
UNS number
S21500
Metallurgical class
Austenitic grade: usually predominantly face-centered cubic, hardenable only by cold working
Type
No type number is printed; the grade is identified by its UNS number only
Values
Maximum unless a range or minimum is shown; where two limits are shown for the same element in one grade the more stringent applies
Other elements (as printed)
Cb 0.75-1.25, V 0.15-0.40, B 0.003-0.009
These are the recommended composition limits of the A959 guide, intended for adoption by standards for stainless steel products; they are not a product specification.
Source: ASTM A959:2011, Table 1 and its footnotes
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