IS 5517:1993 40Cr7Al10Mo2 Steel: Specifications & Listings
IS 5517:1993 40Cr7Al10Mo2: 40Cr7Al10Mo2 is a steel in IS 5517:1993 (Steels for Hardening and Tempering), intended in general for forgings and machined parts for engineering or automobile purposes.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C
Si
Mn
Cr
Mo
Al
S
P
0.35-0.45
0.10-0.35
0.40-0.70
1.50-1.80
0.10-0.25
0.90-1.30
<=0.035
<=0.035
Mechanical Properties
Tensile Strength
700-850 MPa
Yield Strength (0.2% proof)
540 MPa min
Elongation
>=18%
Izod Impact
55 J min
Hardness (annealed)
<=230 HB
Condition
Hardened and tempered, ruling section up to 150 mm
More data from IS 5517:1993
From the standard
Heat treatment temperatures4 values
Hot working temperature
1200 to 850 °C
Hardening temperature
850 to 900 °C
Quenching medium
Oil
Tempering temperature
550 to 700 °C
Source: IS 5517:1993 with Amendments 1 to 3, Table 4
Properties after hardening and tempering, by ruling section3 sections
Tensile strength (MPa)
0.2% proof stress, min (MPa)
Elongation, min (%)
Izod impact, min (J)
Limiting ruling section (mm)
700 to 850
540
18
55
150
800 to 950
600
16
55
100
900 to 1050
700
15
48
63
Values apply to test bars taken from rounds along the direction of rolling. Izod impact values are for fine grained steels.
Source: IS 5517:1993 with Amendments 1 to 3, Table 5
Hardness by delivery condition2 conditions
As annealed (A), maximum
230 HB
As rolled (R), maximum
As per agreement
Source: IS 5517:1993 with Amendments 1 to 3, Table 6
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