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ASTM A959:2011 XM-10 Steel: Specifications & Listings

ASTM A959:2011 XM-10: Austenitic stainless steel type XM-10 (UNS S21900) with the composition limits of ASTM A959-11. Carbon up to 0.08% and chromium 19.0-21.5%.

Category: Stainless Steel
Grade Details
GradeASTM A959:2011 XM-10
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 S21900 ASTM A276/A276M:2017 USA No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
ASTM A276/A276M S21900 ASTM A276/A276M:2017 Strong Match
IS 6603 X12Cr18Mn9Ni5N IS 6603:2024 Close Alternative
IS 6911 X10Cr18Mn9Ni5 IS 6911:1992 Close Alternative
ASTM A959 202 ASTM A959:2011 Close Alternative
ASTM A240/A240M S20200 ASTM A240/A240M:2025 Close Alternative
ASTM A276/A276M S20200 ASTM A276/A276M:2017 Close Alternative
EN 10088-1 X8CrMnNi19-6-3 EN 10088-1:2014 Close Alternative
EN 10088-1 X8CrMnNi19-6-3 EN 10088-1:2023 Close Alternative
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 N Ni P S Si
<=0.08 19.0-21.5 8.0-10.0 0.15-0.40 5.5-7.5 <=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
S21900
Metallurgical class
Austenitic grade: usually predominantly face-centered cubic, hardenable only by cold working
Type
XM-10 (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
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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