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IS 1570 (Part 4) 40Cr5Mo6 vs BS 970 EN24

Close Alternative — 79% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 4) 40Cr5Mo6 (IS 1570 (Part 4):1988) and BS 970 EN24 (BS 970:1955) are both steel grades. Both fall under the Alloy Steel category. IS 1570 (Part 4) 40Cr5Mo6 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 EN24 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 1570 (Part 4) 40Cr5Mo6 vs BS 970 EN24 is a 79% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 79%.

Frequently Compared With IS 1570 (Part 4) 40Cr5Mo6:
IS 4367 10Cr9Mo10 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 10Cr20Mo6 NF A35-565 100C6 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 GB/T 3077 12Cr2Ni4A UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
79%
MECHANICAL MATCH
No shared data
OVERALL
79%
Specifications
Property IS 1570 (Part 4) 40Cr5Mo6 BS 970 EN24
Standard IS 1570 (Part 4):1988 BS 970:1955
Category Alloy Steel Alloy Steel
C (%) 0.35-0.45 0.35-0.45
Si (%) 0.10-0.35 0.10-0.35
Mn (%) 0.40-0.70 0.45-0.70
Ni (%) <=0.40 1.30-1.80
Cr (%) 1.00-1.50 0.90-1.40
Mo (%) 0.50-0.70 0.20-0.35
S (%) Not specified <=0.050
P (%) Not specified <=0.050
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property IS 1570 (Part 4) 40Cr5Mo6 BS 970 EN24
Tensile Strength Not specified ≥772 MPa (50 tons/sq in, converted)
Yield Strength Not specified ≥587 MPa (38 tons/sq in, converted)
Elongation Not specified ≥20%
Hardness Not specified 223-277 HB
Condition Not specified Hardened and tempered S, ruling section 6 in (lowest-strength condition of the standard)
Typical Applications
IS 1570 (Part 4) 40Cr5Mo6
Not documented
BS 970 EN24
Heavy duty gears, shafts, connecting rods
Key Differences
Can IS 1570 (Part 4) 40Cr5Mo6 Be Substituted With BS 970 EN24?
IS 1570 (Part 4) 40Cr5Mo6 and BS 970 EN24 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
Forms & Sizes Available on M-EX
IS 1570 (Part 4) 40Cr5Mo6
No active listings currently.
BS 970 EN24
Round Bar → (26 listings)
Diameter: 50–130 mm (1.97–5.12 in)
Length: 4800–7000 mm (188.98–275.59 in)
Flat Bar → (6 listings)
Thickness: 25–40 mm (0.98–1.57 in)
Width: 200–200 mm (7.87–7.87 in)
Length: 2500–3900 mm (98.43–153.54 in)
Hex Bar → (4 listings)
Across Flats: 45–50 mm (1.77–1.97 in)
Length: 2500–3900 mm (98.43–153.54 in)
On M-EX Right Now
IS 1570 (Part 4) 40Cr5Mo6
0 active listings and RFQs →
BS 970 EN24
36 active listings and RFQs →
Frequently Asked Questions
What is the difference between IS 1570 (Part 4) 40Cr5Mo6 and BS 970 EN24?
BS 970 EN24 specifies S, P which are not specified for IS 1570 (Part 4) 40Cr5Mo6.
Can IS 1570 (Part 4) 40Cr5Mo6 be substituted with BS 970 EN24?
IS 1570 (Part 4) 40Cr5Mo6 and BS 970 EN24 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.