ASTM A959:2011 SS304: Austenitic stainless steel type 304 (UNS S30400) with the composition limits of ASTM A959-11. Carbon up to 0.07% and chromium 17.5-19.5%.
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
Ni
P
S
Si
<=0.07
17.5-19.5
<=2.00
8.0-11.0
<=0.045
<=0.030
<=1.00
Typical Available Sizes
Sheet/Plate
0.5mm–50mm thk
Round Bar
6mm–200mm dia
Pipe
6mm–219mm OD
Flat Bar
10×3mm–200×20mm
Sizes are indicative. Contact seller for exact availability.
More data from ASTM A959:2011
From the standard
Other composition limitsfrom Table 1 and its footnotes
UNS number
S30400
Metallurgical class
Austenitic grade: usually predominantly face-centered cubic, hardenable only by cold working
Type
304 (designation originally assigned by the American Iron and Steel Institute)
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. Existing site name kept for type 304.