ASTM A959:2011 615: Martensitic stainless steel type 615 (UNS S41800) with the composition limits of ASTM A959-11. Carbon 0.15-0.20% and chromium 12.0-14.0%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C
Cr
Mn
Mo
Ni
P
S
Si
W
0.15-0.20
12.0-14.0
<=0.50
<=0.50
1.80-2.20
<=0.040
<=0.030
<=0.50
2.5-3.5
More data from ASTM A959:2011
From the standard
Other composition limitsfrom Table 1 and its footnotes
UNS number
S41800
Metallurgical class
Martensitic grade: can be hardened by heat treating and quenching and then tempered; delivered annealed or hardened and tempered
Type
615 (common type number, not a trademark, widely used; not associated with any one product)
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)
W 2.5-3.5
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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