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IS 6911:1992 X20Cr25Ni20 Steel: Specifications & Listings

IS 6911:1992 X20Cr25Ni20: Austenitic stainless steel X20Cr25Ni20 (numerical symbol 310) to IS 6911:1992 (reaffirmed 1998), made as plate, sheet and strip and normally supplied solution annealed and descaled. Minimum tensile strength annealed is 490 MPa with 0.2% proof stress of 210 MPa.

Category: Stainless Steel
Grade Details
GradeIS 6911:1992 X20Cr25Ni20
Standard IS 6911:1992
ApplicationsStainless and heat-resisting steel plate, sheet and strip (clause 1.1)
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
IS 1570 (Part 5) X20Cr25Ni20 IS 1570 (Part 5):1985 India No activity yet
ASTM A959 314 ASTM A959:2011 USA No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
ASTM A959 SS310 ASTM A959:2011 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 314 ASTM A959:2011 Strong Match
ASTM A959 310S ASTM A959:2011 Strong Match
ASTM A959 310Cb ASTM A959:2011 Strong Match
EN 10088-1 X15CrNiSi25-21 EN 10088-1:2014 Strong Match
EN 10088-1 X15CrNiSi25-21 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 Cr Mn Ni P S Si
<=0.25 24.0-26.0 <=2.0 18.0-21.0 <=0.045 <=0.030 <=2.5
Mechanical Properties
Bend Test (180 deg) Not required
Elongation (50 mm, annealed) >=40%
Hardness (annealed, max) 217 HBS, 95 HRB
Tensile Strength (annealed) >=490 MPa
Yield Strength (0.2% proof, annealed) >=210 MPa

More data from IS 6911:1992

From the standard
Other composition limits from Table 1 and its note
Steel type
Austenitic
Numerical symbol (ISS)
310
Values
Maximum unless a range is given (ladle analysis)
Element not specified, Titanium, max
0.10
Element not specified, Niobium, max
0.20
Element not specified, Molybdenum, max
0.70
Element not specified, Copper, max
0.50
Elements not listed in Table 1 are not added to the steel except to finish the heat, and then only within the limits shown.
Source: IS 6911:1992, Table 1 and its note

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