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IS 6911:1992 X15Cr16Ni2 Steel: Specifications & Listings

IS 6911:1992 X15Cr16Ni2: Martensitic stainless steel X15Cr16Ni2 (numerical symbol 431) to IS 6911:1992 (reaffirmed 1998), made as plate, sheet and strip and normally supplied annealed and descaled. Minimum tensile strength annealed is 830 MPa with 0.2% proof stress of 640 MPa.

Category: Stainless Steel
Grade Details
GradeIS 6911:1992 X15Cr16Ni2
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) X15Cr16Ni2 IS 1570 (Part 5):1985 India No activity yet
ASTM A959 431 ASTM A959:2011 USA No activity yet
BS 970 (Part 1) 431S29 BS 970 (Part 1):1991 UK No activity yet
EN 10088-1 X17CrNi16-2 EN 10088-1:2014 Europe (CEN) No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
ASTM A959 431 ASTM A959:2011 Strong Match
EN 10088-1 X17CrNi16-2 EN 10088-1:2014 Strong Match
EN 10088-1 X17CrNi16-2 EN 10088-1:2023 Strong Match
BS 970 (Part 1) 431S29 BS 970 (Part 1):1991 Strong Match
BS 970 (Part 3) 431S29 BS 970 (Part 3):1991 Strong Match
BS 970 (Part 1) 431S29 BS 970 (Part 1):1983 Strong Match
ASTM A959 630 ASTM A959:2011 Close Alternative
EN 10088-1 X6CrNi17-1 EN 10088-1:2014 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 Cr Mn Ni P S Si
0.10-0.20 15.0-17.0 <=1.0 1.25-2.50 <=0.045 <=0.030 <=1.0
Mechanical Properties
Elongation (50 mm, annealed) >=10%
Hardness (annealed, max) 262 HBS
Tensile Strength (annealed) >=830 MPa
Yield Strength (0.2% proof, annealed) >=640 MPa

More data from IS 6911:1992

From the standard
Other composition limits from Table 1 and its note
Steel type
Martensitic
Numerical symbol (ISS)
431
Values
Maximum unless a range is given (ladle analysis)
Element not specified, Molybdenum, max
0.30
Element not specified, Copper, max
0.30
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
Recommended heat treatment Table 3
TreatmentTemperature (deg C)Cooling medium
Annealing, A750 to 800air
Annealing (second range)620 to 670air
Hardening (Q + T)980 to 1 030oil or air
Tempering630 to 700-
Recommended heat treatment (clause 8.3). Austenitic steels are supplied solution annealed and descaled; ferritic and martensitic steels annealed and descaled, unless agreed otherwise.
Source: IS 6911:1992, Table 3

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