IS 11169 (Part 1):2022 15C4GC (case hardening): Cold heading quality non-alloy case hardening steel 15C4GC (case hardening) to IS 11169 (Part 1):2022, for parts case hardened after cold heading or cold extrusion, supplied as wire rod, bars or wire of 2 to 100 mm. Maximum tensile strength as hot rolled is 480 MPa.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C
Cu
Mn
P
S
Si
0.13-0.17
<=0.25
0.30-0.60
<=0.025
<=0.025
<=0.30
Mechanical Properties
Tensile Strength, as rolled (+AR)
<=480 MPa (over 5 to 100 mm)
More data from IS 11169 (Part 1):2022
From the standard
Other composition limitsfrom the table notes and clauses
Values
Maximum unless a range is given (ladle analysis)
Deoxidation
Aluminium killed (clause 6.2)
Same name in Annex A
The standard also prints 15C4GC in Annex A (Table A.2) for a different steel not intended for heat treatment
Elements not listed are not added intentionally without the purchaser's agreement, except those used to finish the heat.
Source: IS 11169 (Part 1):2022, Table B.2 and its notes, clause 6.2
Tensile strength and reduction of area by delivery conditionby delivery condition and size
Delivery condition
Diameter (mm)
Tensile strength, max (MPa)
Reduction of area, min (%)
+AR or +PE
over 5 to 10
480
58
+AR or +PE
over 10 to 40
480
58
+AR or +PE
over 40 to 100
480
58
+AC or +AC+PE
over 5 to 10
430
65
+AC or +AC+PE
over 10 to 40
430
65
+AC or +AC+PE
over 40 to 100
430
65
+AR+C
over 5 to 10
570
56
+AR+C
over 10 to 40
560
56
+AR+C+AC
2 (incl.) to 5
420
67
+AR+C+AC
over 5 to 10
410
67
+AR+C+AC
over 10 to 40
410
67
+AR+C+AC+LC
2 (incl.) to 5
460
65
+AR+C+AC+LC
over 5 to 10
450
65
+AR+C+AC+LC
over 10 to 40
450
65
+AC+C
over 5 to 10
520
62
+AC+C
over 10 to 40
510
62
Codes: +AR as hot rolled, +PE peeled, +C cold drawn, +AC annealed to spheroidized carbides, +LC skin passed. For non-circular sections the properties are agreed between manufacturer and purchaser. Reduction of area values in the as rolled condition are for information only.
Source: IS 11169 (Part 1):2022, Table B.3
Active IS 11169 (Part 1):2022 15C4GC (case hardening) Listings on M-EX (For Sale)