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IS 6603:2024 X01Ni25Cr20Mo5Cu Steel: Specifications & Listings

IS 6603:2024 X01Ni25Cr20Mo5Cu: X01Ni25Cr20Mo5Cu: austenitic corrosion resisting stainless steel, numerical symbol 904L. Specified in IS 6603:2024.

Category: Stainless Steel
Grade Details
GradeIS 6603:2024 X01Ni25Cr20Mo5Cu
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 904L ASTM A959:2011 USA No activity yet
EN 10088-1 X1NiCrMoCu25-20-5 EN 10088-1:2014 Europe (CEN) No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
EN 10088-1 X1NiCrMoCu25-20-5 EN 10088-1:2014 Strong Match
EN 10088-1 X1NiCrMoCu25-20-5 EN 10088-1:2023 Strong Match
ASTM A959 904L ASTM A959:2011 Strong Match
EN 10088-3 X1NiCrMoCu25-20-5 EN 10088-3:2014 Close Alternative
EN 10088-2 X1NiCrMoCu25-20-5 EN 10088-2:2014 Close Alternative
ASTM A240/A240M N08904 ASTM A240/A240M:2025 Close Alternative
ASTM A276/A276M N08904 ASTM A276/A276M:2017 Close Alternative
ASTM A959 N08700 ASTM A959:2011 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 Si Mn P S Cr Mo Ni N Cu
<=0.020 <=0.75 <=2.00 <=0.035 <=0.015 19.0-22.0 4.0-5.0 23.5-26.0 <=0.15 1.20-2.00
Mechanical Properties
Tensile Strength 530-730 MPa
Yield Strength >=220 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 2 size ranges
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 160220260530 to 73035-100-
over 160 to 250220260530 to 730-30-60
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 6 rows
Thickness or diameter (mm)Rp0.2 min (MPa)Rm (MPa)A5 min, longitudinal (%)A5 min, transverse (%)KV2 min, longitudinal (J)KV2 min, transverse (J)
up to 10400600 to 93020---
over 10 to 16400600 to 93020---
over 16 to 40230530 to 88025-100-
over 40 to 63230530 to 88025-100-
over 63 to 160230530 to 73035-100-
over 160 to 250230530 to 730-30-60
Bright bars, conditions 2H, 2B, 2G or 2P; A5 valid for 5 mm and above.
Source: IS 6603:2024, Table 15
Proof strength at elevated temperature 10 temperatures
Temperature (deg C)Rp0.2 min (MPa)Rp1.0 min (MPa)
100205235
150190220
200175205
250160190
300145175
350135165
400125155
450115145
500110140
550105135
Minimum values, solution annealed (+AT); for guidance only.
Source: IS 6603:2024, Table 10
Hot forming and solution annealing guideline temperatures
Hot forming temperature
1200 to 900 deg C
Cooling after hot forming
air
Heat treatment symbol
+AT
Solution annealing temperature
1050 to 1150 deg C
Cooling after solution annealing
water, air (rapid cooling)
Informative guideline (Annex A).
Source: IS 6603:2024, Table 20

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