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IS 6603:2024 X04Cr25Ni20 Steel: Specifications & Listings

IS 6603:2024 X04Cr25Ni20: X04Cr25Ni20: austenitic corrosion resisting stainless steel, numerical symbol 310S. Specified in IS 6603:2024.

Category: Stainless Steel
Grade Details
GradeIS 6603:2024 X04Cr25Ni20
Standard IS 6603:2024
ApplicationsGeneral purposes, semi-finished products, bars, wire rods and bright bars
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
ASTM A959 310S ASTM A959:2011 USA No activity yet
ASTM A959 310Cb ASTM A959:2011 USA No activity yet
BS 970 (Part 3) 310S31 BS 970 (Part 3):1991 UK No activity yet
ASTM A959 SS310 ASTM A959:2011 USA 3 listings, 0 RFQs →
EN 10088-1 X8CrNi25-21 EN 10088-1:2014 Europe (CEN) 3 listings, 0 RFQs →
ASTM A959 310H ASTM A959:2011 USA No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
ASTM A959 310S ASTM A959:2011 Strong Match
ASTM A959 310Cb ASTM A959:2011 Strong Match
IS 6603 X12Cr25Ni20 IS 6603:2024 Strong Match
BS 970 (Part 3) 310S31 BS 970 (Part 3):1991 Strong Match
BS 970 (Part 1) 310S31 BS 970 (Part 1):1983 Strong Match
ASTM A959 SS310 ASTM A959:2011 Strong Match
EN 10088-1 X8CrNi25-21 EN 10088-1:2014 Strong Match
EN 10088-1 X8CrNi25-21 EN 10088-1:2023 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 Si Mn P S Cr Ni
<=0.08 <=1.50 <=2.00 <=0.045 <=0.030 24.0-26.0 19.0-22.0
Mechanical Properties
Tensile Strength 500-700 MPa
Yield Strength >=210 MPa
Elongation >=35%
Condition Solution annealed, conditions 1C, 1E, 1D, 1X, 1G and 2D, thickness or diameter up to 160 mm; Yield Strength is Rp0.2, Elongation is A (longitudinal)

More data from IS 6603:2024

From the standard
Mechanical properties by thickness or diameter 1 size range
Thickness or diameter (mm)Rp0.2 min (MPa)Rp1.0 min (MPa)Rm (MPa)A min, longitudinal (%)A min, transverse (%)KV2 min, longitudinal (J)KV2 min, transverse (J)
up to 160210250500 to 70035---
Solution annealed, conditions 1C, 1E, 1D, 1X, 1G and 2D; elongation and proof strength are not valid for rod.
Source: IS 6603:2024, Table 5
Bright bars, solution annealed 2 rows
Thickness or diameter (mm)Rp0.2 min (MPa)Rm (MPa)A5 min (%)
up to 12.7031062030
over 12.7020551530
Bright bars, conditions 2H, 2B, 2G or 2P; A5 valid for 5 mm and above.
Source: IS 6603:2024, Table 15

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