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IS 6911:1992 X20Cr13 Steel: Specifications & Listings

IS 6911:1992 X20Cr13: Martensitic stainless steel X20Cr13 (numerical symbol 420 S1) to IS 6911:1992 (reaffirmed 1998), made as plate, sheet and strip and normally supplied annealed and descaled. Minimum tensile strength annealed is 690 MPa with 0.2% proof stress of 490 MPa.

Category: Stainless Steel
Grade Details
GradeIS 6911:1992 X20Cr13
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) X20Cr13 IS 1570 (Part 5):1985 India No activity yet
BS 970 (Part 1) 420S29 BS 970 (Part 1):1991 UK No activity yet
BS 970 (Part 1) 420S37 BS 970 (Part 1):1991 UK No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
BS 970 (Part 1) 420S37 BS 970 (Part 1):1991 Strong Match
BS 970 (Part 3) 420S37 BS 970 (Part 3):1991 Strong Match
BS 970 (Part 1) 420S37 BS 970 (Part 1):1983 Strong Match
BS 970 (Part 1) 420S29 BS 970 (Part 1):1991 Strong Match
BS 970 (Part 3) 420S29 BS 970 (Part 3):1991 Strong Match
BS 970 (Part 1) 420S29 BS 970 (Part 1):1983 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 Cr Mn Ni P S Si
0.16-0.25 12.0-14.0 <=1.0 <=1.0 <=0.040 <=0.030 <=1.0
Mechanical Properties
Elongation (50 mm, annealed) >=14%
Hardness (annealed, max) 229 HBS
Tensile Strength (annealed) >=690 MPa
Yield Strength (0.2% proof, annealed) >=490 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)
420 S1
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, A770 to 870furnace
Hardening (Q + T)980 to 1 030oil or air
Tempering650 to 770-
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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