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BS 970 EN25 vs IS 1570 (Part 4) 40Cr5Mo6

Related Material — 69.5% match based on chemical composition and mechanical property overlap.

BS 970 EN25 (BS 970:1955) and IS 1570 (Part 4) 40Cr5Mo6 (IS 1570 (Part 4):1988) are both steel grades. Both fall under the Alloy Steel category. BS 970 EN25 is defined under British Standards (BS), originating from United Kingdom, while IS 1570 (Part 4) 40Cr5Mo6 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, BS 970 EN25 vs IS 1570 (Part 4) 40Cr5Mo6 is a 69.5% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 69.5%.

Frequently Compared With BS 970 EN25:
IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 7) 10Mo6H
Match Breakdown
CHEMISTRY MATCH
69.5%
MECHANICAL MATCH
No shared data
OVERALL
69.5%
Specifications
Property BS 970 EN25 IS 1570 (Part 4) 40Cr5Mo6
Standard BS 970:1955 IS 1570 (Part 4):1988
Category Alloy Steel Alloy Steel
C (%) 0.27-0.35 0.35-0.45
Si (%) 0.10-0.35 0.10-0.35
Mn (%) 0.50-0.70 0.40-0.70
Ni (%) 2.30-2.80 <=0.40
Cr (%) 0.50-0.80 1.00-1.50
Mo (%) 0.40-0.70 0.50-0.70
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 EN25 IS 1570 (Part 4) 40Cr5Mo6
Tensile Strength ≥849 MPa (55 tons/sq in, converted) Not specified
Yield Strength ≥680 MPa (44 tons/sq in, converted) Not specified
Elongation ≥18% Not specified
Hardness 248-302 HB Not specified
Condition Hardened and tempered T, ruling section 6 in (lowest-strength condition of the standard) Not specified
Typical Applications
BS 970 EN25
Bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars. Suitable for T to Z (55/65 to 100 tons/sq in) according to ruling section.
IS 1570 (Part 4) 40Cr5Mo6
Not documented
Key Differences
Can BS 970 EN25 Be Substituted With IS 1570 (Part 4) 40Cr5Mo6?
BS 970 EN25 and IS 1570 (Part 4) 40Cr5Mo6 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
On M-EX Right Now
BS 970 EN25
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IS 1570 (Part 4) 40Cr5Mo6
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Frequently Asked Questions
What is the difference between BS 970 EN25 and IS 1570 (Part 4) 40Cr5Mo6?
BS 970 EN25 specifies S, P which are not specified for IS 1570 (Part 4) 40Cr5Mo6.
Can BS 970 EN25 be substituted with IS 1570 (Part 4) 40Cr5Mo6?
BS 970 EN25 and IS 1570 (Part 4) 40Cr5Mo6 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.