Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
Al
C
Cb
Cr
Mn
Mo
Ni
P
S
Si
<=0.05
0.13-0.18
0.15-0.45
11.5-13.0
0.40-0.60
<=0.20
<=0.50
<=0.030
<=0.030
<=0.50
More data from ASTM A959:2011
From the standard
Other composition limitsfrom Table 1 and its footnotes
UNS number
S41041
Metallurgical class
Martensitic grade: can be hardened by heat treating and quenching and then tempered; delivered annealed or hardened and tempered
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)
Al 0.05, Cb 0.15-0.45
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
Active ASTM A959:2011 S41041 Listings on M-EX (For Sale)