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ASTM A959:2011 310H Steel: Specifications & Listings

ASTM A959:2011 310H: Austenitic stainless steel type 310H (UNS S31009) with the composition limits of ASTM A959-11. Carbon 0.04-0.10% and chromium 24.0-26.0%.

Category: Stainless Steel
Grade Details
GradeASTM A959:2011 310H
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 A240/A240M S31009 ASTM A240/A240M:2025 USA No activity yet
ASTM A240/A240M S31041 ASTM A240/A240M:2025 USA No activity yet
IS 1570 (Part 5) X04Cr25Ni20 IS 1570 (Part 5):1985 India No activity yet
BS 970 (Part 1) 310S31 BS 970 (Part 1):1991 UK No activity yet
ASTM A240/A240M S31008 ASTM A240/A240M:2025 USA No activity yet
IS 6603 X12Cr25Ni20 IS 6603:2024 India No activity yet
EN 10088-1 X6CrNi25-20 EN 10088-1:2014 Europe (CEN) No activity yet
JIS G4304 SUS310S JIS G4304:2021 Japan No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
ASTM A959 310HCb ASTM A959:2011 Strong Match
ASTM A240/A240M S31009 ASTM A240/A240M:2025 Strong Match
ASTM A959 310S ASTM A959:2011 Strong Match
ASTM A959 310Cb ASTM A959:2011 Strong Match
ASTM A959 310HCbN ASTM A959:2011 Strong Match
ASTM A240/A240M S31041 ASTM A240/A240M:2025 Strong Match
IS 1570 (Part 5) X04Cr25Ni20 IS 1570 (Part 5):1985 Strong Match
BS 970 (Part 1) 310S31 BS 970 (Part 1):1991 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
0.04-0.10 24.0-26.0 <=2.00 19.0-22.0 <=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
S31009
Metallurgical class
Austenitic grade: usually predominantly face-centered cubic, hardenable only by cold working
Type
310H (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
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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