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ASTM A240/A240M:2025 S41008 Steel: Specifications & Listings

ASTM A240/A240M:2025 S41008: S41008 (type 410S): ferritic or martensitic (chromium) stainless steel plate, sheet and strip (UNS S41008). Specified in ASTM A240/A240M:2025.

Category: Stainless Steel
Grade Details
GradeASTM A240/A240M:2025 S41008
Standard ASTM A240/A240M:2025
ApplicationsPressure vessels and general applications (plate, sheet and strip)
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
ASTM A959 405 ASTM A959:2011 USA No activity yet
ASTM A959 S40800 ASTM A959:2011 USA No activity yet
ASTM A959 409 ASTM A959:2011 USA No activity yet
ASTM A959 409Cb ASTM A959:2011 USA No activity yet
BS 970 (Part 1) 403S17 BS 970 (Part 1):1991 UK No activity yet
BS 970 (Part 1) 410S21 BS 970 (Part 1):1991 UK No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
BS 970 (Part 1) 403S17 BS 970 (Part 1):1991 Strong Match
BS 970 (Part 3) 403S17 BS 970 (Part 3):1991 Strong Match
BS 970 (Part 1) 403S17 BS 970 (Part 1):1983 Strong Match
ASTM A959 S40800 ASTM A959:2011 Strong Match
ASTM A959 405 ASTM A959:2011 Strong Match
ASTM A959 409 ASTM A959:2011 Strong Match
BS 970 (Part 1) 410S21 BS 970 (Part 1):1991 Strong Match
BS 970 (Part 3) 410S21 BS 970 (Part 3):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 Mn P S Si Cr Ni
<=0.08 <=1.00 <=0.040 <=0.030 <=1.00 11.5-13.5 <=0.60
Mechanical Properties
Tensile Strength >=415 MPa
Yield Strength >=205 MPa
Elongation >=22%
Hardness <=183 HB
Condition Plate, sheet and strip; yield by 0.2 percent offset

More data from ASTM A240/A240M:2025

From the standard
Mechanical properties 1 condition(s)
Product or thicknessTensile strength, min (MPa)Yield strength, min (MPa)Elongation in 50 mm, min (%)
All41520522
Minimum values; yield strength by the 0.2 percent offset method. Material 0.050 in. [1.27 mm] and under in thickness shall have a minimum elongation of 20 %.
Source: ASTM A240/A240M:2025, Table 2
Hardness 1 condition(s)
Product or thicknessBrinell HBW, maxRockwell, max
All18389 HRBW
Maximum values; either Brinell or Rockwell scale may be used.
Source: ASTM A240/A240M:2025, Table 2
Cold bend 1 value
Cold bend angle
180 deg
Bend tests are not required for chromium steels thicker than 1 in. [25 mm] or for any austenitic or duplex steel regardless of thickness.
Source: ASTM A240/A240M:2025, Table 2

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