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

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

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

As per chemical composition, BS 970 EN40C vs IS 1570 (Part 4) 35Cr5Mo6V2 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 BS 970 EN40C:
IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 07Cr4Mo6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 7) 10Mo6H UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 10Cr20Mo6 NF A35-565 100C6 IS 1570 (Part 4) 103Cr6
Match Breakdown
CHEMISTRY MATCH
74.2%
MECHANICAL MATCH
No shared data
OVERALL
74.2%
Specifications
Property BS 970 EN40C IS 1570 (Part 4) 35Cr5Mo6V2
Standard BS 970:1955 IS 1570 (Part 4):1988
Category Alloy Steel Alloy Steel
C (%) 0.30-0.50 0.25-0.45
Si (%) 0.10-0.35 0.10-0.35
Mn (%) 0.40-0.80 0.40-0.70
Ni (%) <=0.40 <=0.30
Cr (%) 2.50-3.50 1.00-1.50
Mo (%) 0.70-1.20 0.50-0.80
V (%) 0.10-0.30 0.20-0.30
S (%) <=0.050 Not specified
P (%) <=0.050 Not specified
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property BS 970 EN40C IS 1570 (Part 4) 35Cr5Mo6V2
Tensile Strength ≥1313 MPa (85 tons/sq in, converted) Not specified
Yield Strength ≥1112 MPa (72 tons/sq in, converted) Not specified
Elongation ≥10% Not specified
Hardness 375-444 HB Not specified
Condition Hardened and tempered (single condition), ruling section 2 1/2 in (lowest-strength condition of the standard) Not specified
Typical Applications
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.
IS 1570 (Part 4) 35Cr5Mo6V2
Not documented
Key Differences
Can BS 970 EN40C Be Substituted With IS 1570 (Part 4) 35Cr5Mo6V2?
BS 970 EN40C and IS 1570 (Part 4) 35Cr5Mo6V2 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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BS 970 EN40C
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IS 1570 (Part 4) 35Cr5Mo6V2
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Frequently Asked Questions
What is the difference between BS 970 EN40C and IS 1570 (Part 4) 35Cr5Mo6V2?
BS 970 EN40C specifies S, P which are not specified for IS 1570 (Part 4) 35Cr5Mo6V2.
Can BS 970 EN40C be substituted with IS 1570 (Part 4) 35Cr5Mo6V2?
BS 970 EN40C and IS 1570 (Part 4) 35Cr5Mo6V2 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.