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ASTM A959:2011 XM-25 Steel: Specifications & Listings

ASTM A959:2011 XM-25: Precipitation hardening stainless steel type XM-25 (UNS S45000) with the composition limits of ASTM A959-11. Carbon up to 0.05% and chromium 14.0-16.0%.

Category: Stainless Steel
Grade Details
GradeASTM A959:2011 XM-25
Standard ASTM A959:2011
ApplicationsWrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
ASTM A959 S41500 ASTM A959:2011 Close Alternative
ASTM A240/A240M S41500 ASTM A240/A240M:2025 Close Alternative
ASTM A276/A276M S41500 ASTM A276/A276M:2017 Close Alternative
IS 6603 X03Cr13Ni4Mo IS 6603:2024 Close Alternative
IS 6603 X03Cr15Mn8Ni5Cu3 IS 6603:2024 Related Material
EN 10088-1 X3CrNiMnCu15-8-5-3 EN 10088-1:2014 Related Material
EN 10088-1 X3CrNiMnCu15-8-5-3 EN 10088-1:2023 Related Material
EN 10088-3 X3CrMnNiCu15-8-5-3 EN 10088-3:2014 Related Material
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C Cr Cu Mn Mo Ni P S Si
<=0.05 14.0-16.0 1.25-1.75 <=1.00 0.50-1.00 5.0-7.0 <=0.040 <=0.030 <=1.00

More data from ASTM A959:2011

From the standard
Other composition limits from Table 1 and its footnotes
UNS number
S45000
Metallurgical class
Precipitation hardening grade: basically austenitic or martensitic, hardenable by precipitation (age) hardening
Type
XM-25 (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)
Cu 1.25-1.75, Cb 8xC min
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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