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ASTM A959:2011 S41050 Steel: Specifications & Listings

ASTM A959:2011 S41050: Ferritic stainless steel grade (UNS S41050) with the composition limits of ASTM A959-11. Carbon up to 0.04% and chromium 10.5-12.5%.

Category: Stainless Steel
Grade Details
GradeASTM A959:2011 S41050
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 S41050 ASTM A240/A240M:2025 USA No activity yet
EN 10088-3 X2CrNi12 EN 10088-3:2014 Europe No activity yet
ASTM A240/A240M S40977 ASTM A240/A240M:2025 USA No activity yet
ASTM A240/A240M S41003 ASTM A240/A240M:2025 USA No activity yet
EN 10088-1 X2CrNi12 EN 10088-1:2014 Europe (CEN) No activity yet
ASTM A959 S40975 ASTM A959:2011 USA No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
ASTM A240/A240M S41050 ASTM A240/A240M:2025 Strong Match
EN 10088-3 X2CrNi12 EN 10088-3:2014 Strong Match
ASTM A959 S40975 ASTM A959:2011 Strong Match
ASTM A959 S40977 ASTM A959:2011 Strong Match
ASTM A959 S41003 ASTM A959:2011 Strong Match
ASTM A240/A240M S40977 ASTM A240/A240M:2025 Strong Match
ASTM A240/A240M S41003 ASTM A240/A240M:2025 Strong Match
EN 10088-1 X2CrNi12 EN 10088-1:2014 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 N Ni P S Si
<=0.04 10.5-12.5 <=1.00 <=0.10 0.60-1.10 <=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
S41050
Metallurgical class
Ferritic grade: body-centered cubic, little or no tempered martensite, hardenable only slightly by cold working
Type
No type number is printed; the grade is identified by its UNS number only
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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