ASTM A959:2011 S32906: Duplex (austenitic-ferritic) stainless steel grade (UNS S32906) with the composition limits of ASTM A959-11. Carbon up to 0.030% and chromium 28.0-30.0%.
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
<=0.030
28.0-30.0
<=0.80
0.80-1.50
1.50-2.60
0.30-0.40
5.8-7.5
<=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
S32906
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
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 0..80; loaded as 0.80 max.
Source: ASTM A959:2011, Table 1 and its footnotes
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