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BS 970 EN8M vs IS 1570 (Part 3) 10C8S10

Minimal Match — 53% match based on chemical composition and mechanical property overlap.

BS 970 EN8M (BS 970:1955) and IS 1570 (Part 3) 10C8S10 (IS 1570 (Part 3):1979) are both steel grades. Both fall under the Free Machining Steel category. BS 970 EN8M is defined under British Standards (BS), originating from United Kingdom, while IS 1570 (Part 3) 10C8S10 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, BS 970 EN8M vs IS 1570 (Part 3) 10C8S10 is a 79.5% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 53%.

Frequently Compared With BS 970 EN8M:
SAE J403 1140 SAE J403 1141 SAE J403 1118 SAE J403 1138 SAE J403 1138 SAE J403 1140 IS 4432 10C8S10 SAE J403 1117 SAE J403 1138 SAE J403 1117 SAE J403 1117 SAE J403 1118
Match Breakdown
CHEMISTRY MATCH
79.5%
MECHANICAL MATCH
0%
OVERALL
53%
Specifications
Property BS 970 EN8M IS 1570 (Part 3) 10C8S10
Standard BS 970:1955 IS 1570 (Part 3):1979
Category Free Machining Steel Free Machining Steel
C (%) 0.35-0.45 <=0.15
Si (%) <=0.25 0.05-0.30
Mn (%) 1.0-1.30 0.60-0.90
S (%) 0.12-0.20 0.08-0.13
P (%) <=0.060 <=0.060
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 EN8M IS 1570 (Part 3) 10C8S10
Tensile Strength ≥541 MPa (35 tons/sq in, converted) 370-490 MPa
Yield Strength ≥278 MPa (18 tons/sq in, converted) Not specified
Elongation ≥20% >=24%
Hardness 152-207 HB Not specified
Condition Normalised, ruling section 6 in (lowest-strength condition of the standard) Hot rolled or normalized bars, billets and forgings (Table 2), ruling sections up to 150 mm
Typical Applications
BS 970 EN8M
High volume turned parts, automotive components
IS 1570 (Part 3) 10C8S10
Not documented
Can BS 970 EN8M Be Substituted With IS 1570 (Part 3) 10C8S10?
BS 970 EN8M and IS 1570 (Part 3) 10C8S10 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.
Forms & Sizes Available on M-EX
BS 970 EN8M
Round Bar → (3 listings)
Diameter: 60–60 mm (2.36–2.36 in)
Length: 4000–6900 mm (157.48–271.65 in)
IS 1570 (Part 3) 10C8S10
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On M-EX Right Now
BS 970 EN8M
3 active listings and RFQs →
IS 1570 (Part 3) 10C8S10
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Frequently Asked Questions
What is the difference between BS 970 EN8M and IS 1570 (Part 3) 10C8S10?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN8M be substituted with IS 1570 (Part 3) 10C8S10?
BS 970 EN8M and IS 1570 (Part 3) 10C8S10 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.