ASTM A959:2011 XM-2 Steel: Specifications & Listings

ASTM A959:2011 XM-2: Austenitic stainless steel type XM-2 (UNS S30345) with the composition limits of ASTM A959-11. Carbon up to 0.15% and chromium 17.0-19.0%.

Category: Stainless Steel
Grade Details
GradeASTM A959:2011 XM-2
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
JIS G4304 SUS303 JIS G4304:2021 Japan No activity yet
BS 970 (Part 1) 303S31 BS 970 (Part 1):1991 UK No activity yet
BS 970 (Part 1) 303S42 BS 970 (Part 1):1991 UK No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
JIS G4304 SUS303 JIS G4304:2021 Strong Match
BS 970 (Part 1) 303S31 BS 970 (Part 1):1991 Strong Match
BS 970 (Part 1) 303S31 BS 970 (Part 1):1983 Strong Match
BS 970 (Part 1) 303S42 BS 970 (Part 1):1991 Strong Match
BS 970 (Part 1) 303S42 BS 970 (Part 1):1983 Strong Match
EN 10088-1 X6CrNiCuS18-9-2 EN 10088-1:2014 Close Alternative
EN 10088-1 X6CrNiCuS18-9-2 EN 10088-1:2023 Close Alternative
EN 10088-3 X6CrNiCuS18-9-2 EN 10088-3:2014 Close Alternative
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 Mo Ni P S Si
0.60-1.00 <=0.15 17.0-19.0 <=2.00 0.40-0.60 8.0-10.0 <=0.05 0.11-0.16 <=1.00

More data from ASTM A959:2011

From the standard
Other composition limits from Table 1 and its footnotes
UNS number
S30345
Metallurgical class
Austenitic grade: usually predominantly face-centered cubic, hardenable only by cold working
Type
XM-2 (numbering system developed and applied by ASTM)
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 0.60-1.00
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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