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IS 1570 (Part 4) 35Cr5Mo6V2 vs BS 970 EN40C

Close Alternative — 74.2% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 4) 35Cr5Mo6V2 (IS 1570 (Part 4):1988) and BS 970 EN40C (BS 970:1955) are both steel grades. Both fall under the Alloy Steel category. IS 1570 (Part 4) 35Cr5Mo6V2 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 EN40C is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 1570 (Part 4) 35Cr5Mo6V2 vs BS 970 EN40C is a 74.2% 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 74.2%.

Frequently Compared With IS 1570 (Part 4) 35Cr5Mo6V2:
NF A35-565 100C6 IS 1570 (Part 4) 103Cr4 UNI 11234 100Cr6 IS 1570 (Part 4) 105Cr5 IS 4367 10Cr9Mo10 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 4) 10Cr20Mo6 GB/T 3077 12Cr2Ni4A GOST 4543 12HN3A
Match Breakdown
CHEMISTRY MATCH
74.2%
MECHANICAL MATCH
No shared data
OVERALL
74.2%
Specifications
Property IS 1570 (Part 4) 35Cr5Mo6V2 BS 970 EN40C
Standard IS 1570 (Part 4):1988 BS 970:1955
Category Alloy Steel Alloy Steel
C (%) 0.25-0.45 0.30-0.50
Si (%) 0.10-0.35 0.10-0.35
Mn (%) 0.40-0.70 0.40-0.80
Ni (%) <=0.30 <=0.40
Cr (%) 1.00-1.50 2.50-3.50
Mo (%) 0.50-0.80 0.70-1.20
V (%) 0.20-0.30 0.10-0.30
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) 35Cr5Mo6V2 BS 970 EN40C
Tensile Strength Not specified ≥1313 MPa (85 tons/sq in, converted)
Yield Strength Not specified ≥1112 MPa (72 tons/sq in, converted)
Elongation Not specified ≥10%
Hardness Not specified 375-444 HB
Condition Not specified Hardened and tempered (single condition), ruling section 2 1/2 in (lowest-strength condition of the standard)
Typical Applications
IS 1570 (Part 4) 35Cr5Mo6V2
Not documented
BS 970 EN40C
Bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars. Suitable where higher core strength is required for nitriding than En 40B provides; purchaser recommended to consult the manufacturer.
Key Differences
Can IS 1570 (Part 4) 35Cr5Mo6V2 Be Substituted With BS 970 EN40C?
IS 1570 (Part 4) 35Cr5Mo6V2 and BS 970 EN40C 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.
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IS 1570 (Part 4) 35Cr5Mo6V2
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BS 970 EN40C
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Frequently Asked Questions
What is the difference between IS 1570 (Part 4) 35Cr5Mo6V2 and BS 970 EN40C?
BS 970 EN40C specifies S, P which are not specified for IS 1570 (Part 4) 35Cr5Mo6V2.
Can IS 1570 (Part 4) 35Cr5Mo6V2 be substituted with BS 970 EN40C?
IS 1570 (Part 4) 35Cr5Mo6V2 and BS 970 EN40C 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.