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ASTM A959:2011 305 Steel: Specifications & Listings

ASTM A959:2011 305: Austenitic stainless steel type 305 (UNS S30500) with the composition limits of ASTM A959-11. Carbon up to 0.12% and chromium 17.0-19.0%.

Category: Stainless Steel
Grade Details
GradeASTM A959:2011 305
Standard ASTM A959:2011
ApplicationsWrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
ASTM A276/A276M S30500 ASTM A276/A276M:2017 USA No activity yet
JIS G4304 SUS305 JIS G4304:2021 Japan No activity yet
EN 10088-3 X4CrNi18-12 EN 10088-3:2014 Europe No activity yet
JIS G4304 SUS321 JIS G4304:2021 Japan No activity yet
JIS G4304 SUS347 JIS G4304:2021 Japan No activity yet
IS 6603 X04Cr18Ni12 IS 6603:2024 India No activity yet
EN 10088-1 X4CrNi18-12 EN 10088-1:2014 Europe (CEN) No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
ASTM A276/A276M S30500 ASTM A276/A276M:2017 Strong Match
JIS G4304 SUS305 JIS G4304:2021 Strong Match
JIS G4305 SUS305 JIS G4305:2012 Strong Match
ASTM A240/A240M S30500 ASTM A240/A240M:2025 Strong Match
EN 10088-3 X4CrNi18-12 EN 10088-3:2014 Strong Match
JIS G4304 SUS321 JIS G4304:2021 Strong Match
JIS G4304 SUS347 JIS G4304:2021 Strong Match
JIS G4305 SUS321 JIS G4305:2012 Strong Match
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
<=0.12 17.0-19.0 <=2.00 11.0-13.0 <=0.045 <=0.030 <=1.00

More data from ASTM A959:2011

From the standard
Other composition limits from Table 1 and its footnotes
UNS number
S30500
Metallurgical class
Austenitic grade: usually predominantly face-centered cubic, hardenable only by cold working
Type
305 (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.
Source: ASTM A959:2011, Table 1 and its footnotes

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