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IS 1570 (Part 4) 10Cr20Mo6 vs BS 970 EN40A

Close Alternative — 76.2% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 4) 10Cr20Mo6 (IS 1570 (Part 4):1988) and BS 970 EN40A (BS 970:1955) are both steel grades. Both fall under the Alloy Steel category. IS 1570 (Part 4) 10Cr20Mo6 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 EN40A is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 1570 (Part 4) 10Cr20Mo6 vs BS 970 EN40A is a 76.2% 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 76.2%.

Frequently Compared With IS 1570 (Part 4) 10Cr20Mo6:
IS 1570 (Part 4) 103Cr6 NF A35-565 100C6 IS 1570 (Part 4) 07Cr4Mo6 UNI 11234 100Cr6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 10Mo6 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 105Cr5 GOST 4543 12HN3A IS 1570 (Part 4) 103Cr4 IS 1570 (Part 7) 10Mo6H IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
76.2%
MECHANICAL MATCH
No shared data
OVERALL
76.2%
Specifications
Property IS 1570 (Part 4) 10Cr20Mo6 BS 970 EN40A
Standard IS 1570 (Part 4):1988 BS 970:1955
Category Alloy Steel Alloy Steel
C (%) <=0.15 0.10-0.20
Si (%) <=0.50 0.10-0.35
Mn (%) 0.40-0.70 0.40-0.65
Ni (%) <=0.30 <=0.40
Cr (%) 4.0-6.0 2.90-3.50
Mo (%) 0.45-0.65 0.40-0.70
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) 10Cr20Mo6 BS 970 EN40A
Tensile Strength Not specified ≥695 MPa (45 tons/sq in, converted)
Yield Strength Not specified ≥525 MPa (34 tons/sq in, converted)
Elongation Not specified ≥22%
Hardness Not specified 201-255 HB
Condition Not specified Hardened and tempered R, ruling section 6 in (lowest-strength condition of the standard)
Typical Applications
IS 1570 (Part 4) 10Cr20Mo6
Not documented
BS 970 EN40A
Bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars. Suitable for 45/55 (R), 50/60 (S), 55/65 (T), 60/70 (U) tons/sq in; selection of En 40A or 40B governed by tensile range required.
Key Differences
Can IS 1570 (Part 4) 10Cr20Mo6 Be Substituted With BS 970 EN40A?
IS 1570 (Part 4) 10Cr20Mo6 and BS 970 EN40A 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.
On M-EX Right Now
IS 1570 (Part 4) 10Cr20Mo6
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BS 970 EN40A
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Frequently Asked Questions
What is the difference between IS 1570 (Part 4) 10Cr20Mo6 and BS 970 EN40A?
BS 970 EN40A specifies S, P which are not specified for IS 1570 (Part 4) 10Cr20Mo6.
Can IS 1570 (Part 4) 10Cr20Mo6 be substituted with BS 970 EN40A?
IS 1570 (Part 4) 10Cr20Mo6 and BS 970 EN40A 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.