ASTM A959:2011 S39277: Duplex (austenitic-ferritic) stainless steel grade (UNS S39277) with the composition limits of ASTM A959-11. Carbon up to 0.025% and chromium 24.0-26.0%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C
Cr
Cu
Mn
Mo
N
Ni
P
S
Si
W
<=0.025
24.0-26.0
1.20-2.00
<=0.80
3.0-4.0
0.23-0.33
6.5-8.0
<=0.025
<=0.002
<=0.80
0.80-1.20
More data from ASTM A959:2011
From the standard
Other composition limitsfrom Table 1 and its footnotes
UNS number
S39277
Metallurgical class
Austenitic-ferritic (duplex) grade: a mixture of austenitic and ferritic structures, 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)
W 0.80-1.20
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. As printed: copper printed as two stacked values 1.20 and 2.00; read as the range 1.20-2.00.
Source: ASTM A959:2011, Table 1 and its footnotes
Active ASTM A959:2011 S39277 Listings on M-EX (For Sale)