IS 6911:1992 X30Cr13 Steel: Specifications & Listings
IS 6911:1992 X30Cr13: Martensitic stainless steel X30Cr13 (numerical symbol 420 S2) to IS 6911:1992 (reaffirmed 1998), made as plate, sheet and strip and normally supplied annealed and descaled. Minimum tensile strength annealed is 780 MPa with 0.2% proof stress of 590 MPa.
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
0.26-0.35
12.0-14.0
<=1.0
<=1.0
<=0.040
<=0.030
<=1.0
Mechanical Properties
Elongation (50 mm, annealed)
>=11%
Hardness (annealed, max)
235 HBS
Hardness (quenched and tempered, min)
500 HV, 49 HRC
Tensile Strength (annealed)
>=780 MPa
Yield Strength (0.2% proof, annealed)
>=590 MPa
More data from IS 6911:1992
From the standard
Other composition limitsfrom Table 1 and its note
Steel type
Martensitic
Numerical symbol (ISS)
420 S2
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 treatmentTable 3
Treatment
Temperature (deg C)
Cooling medium
Annealing, A
770 to 870
furnace
Hardening (Q + T1, for the Table 4 properties)
980 to 1 030
oil or air
Tempering (T1)
630 to 700
-
Hardening (Q + T2, for the Table 5 hardness)
980 to 1 030
oil or air
Tempering (T2)
100 to 250
-
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
Hardness for cutlery steelsTable 5
Annealed, max
241 HBS
Quenched and tempered, min
500 HV, 49 HRC
Indicative values for cutlery use after suitable heat treatment (clause 10.4). Table 4 gives 235 HBS max for the annealed condition; Table 5 gives 241 HBS.
Source: IS 6911:1992, Table 5
Active IS 6911:1992 X30Cr13 Listings on M-EX (For Sale)