IS 11169 (Part 1):1984 40Cr4 Steel: Specifications & Listings
IS 11169 (Part 1):1984 40Cr4: Cold heading quality alloy steel 40Cr4 to IS 11169 (Part 1):1984, for quenching and tempering, supplied as wire, wire rod or bars of 2 to 100 mm diameter. Old designation 40Cr1. The standard was reaffirmed in 2004.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Other composition limitsfrom the clauses and notes
Sulphur and phosphorus, maximum
0.035 percent each; other limits by agreement
Elements not specified, maximum
Cr 0.15, Ni 0.15, Cu 0.15, Sn 0.02, Mo 0.05, V 0.05 percent; total 0.40
Narrower carbon and silicon ranges may be agreed between purchaser and manufacturer; elements not listed are not added except by agreement or to finish the heat.
Source: IS 11169 (Part 1):1984, clauses 4.1.2, 4.1.3, 4.2 and 4.4, Table 2 notes
Hardness in the annealed condition1 condition
Annealed, maximum
200 HB
Brinell hardness for products delivered in the annealed condition.
Source: IS 11169 (Part 1):1984, Table 5, clause 8.1
Hardened and tempered, by ruling section3 sections
Tensile strength (MPa)
0.2% proof stress, min (MPa)
Elongation, min (%)
Reduction of area (%)
Izod impact (J)
Limiting ruling section (mm)
1000-1200
800
11
40
25
16
900-1180
680
12
45
29
40
800-950
570
14
50
29
100
Recommended values for guidance (clause 9.2.1), on test pieces taken from rounds in the direction of the fibre. The proof stress at 16 mm is smudged in the copy of the standard; read as 800.
Source: IS 11169 (Part 1):1984, Table 6
Core hardenabilityguidance
Core hardness after oil quenching
40 HRC
Up to diameter
28 mm
Hardening temperature
850 to 880 °C
Diameter up to which this core hardness can be reached after quenching in an oil of high quenching capacity. For guidance only.
Source: IS 11169 (Part 1):1984, Appendix C
Active IS 11169 (Part 1):1984 40Cr4 Listings on M-EX (For Sale)