ASTM A959:2011 334: Austenitic stainless steel type 334 (UNS S33400) with the composition limits of ASTM A959-11. Carbon up to 0.08% and chromium 18.0-20.0%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
Al
C
Cr
Mn
Ni
P
S
Si
Ti
0.15-0.60
<=0.08
18.0-20.0
<=1.00
19.0-21.0
<=0.030
<=0.015
<=1.00
0.15-0.60
More data from ASTM A959:2011
From the standard
Other composition limitsfrom Table 1 and its footnotes
UNS number
S33400
Metallurgical class
Austenitic grade: usually predominantly face-centered cubic, hardenable only by cold working
Type
334 (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)
Al 0.15-0.60, Ti 0.15-0.60
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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