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BS 970 EN1B vs IS 1570 (Part 3) 10C8S10

Close Alternative — 70.2% match based on chemical composition and mechanical property overlap.

BS 970 EN1B (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 EN1B 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 EN1B vs IS 1570 (Part 3) 10C8S10 is a 80.3% match. As per mechanical properties, the match is 50%. Combined, this makes them a close alternative overall at 70.2%.

Frequently Compared With BS 970 EN1B:
IS 4432 10C8S10 SAE J403 1117 SAE J403 1117 SAE J403 1118 SAE J403 1118 SAE J403 1118 SAE J403 1126 SAE J403 1126 SAE J403 1126 SAE J403 1132 SAE J403 1117 SAE J403 1132
Match Breakdown
CHEMISTRY MATCH
80.3%
MECHANICAL MATCH
50%
OVERALL
70.2%
Specifications
Property BS 970 EN1B IS 1570 (Part 3) 10C8S10
Standard BS 970:1955 IS 1570 (Part 3):1979
Category Free Machining Steel Free Machining Steel
C (%) 0.07-0.15 <=0.15
Si (%) <=0.10 0.05-0.30
Mn (%) 1.00-1.40 0.60-0.90
S (%) 0.30-0.60 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 EN1B IS 1570 (Part 3) 10C8S10
Tensile Strength ≥355 MPa (23 tons/sq in, converted) 370-490 MPa
Elongation ≥24% >=24%
Condition As rolled or bright finished (other than cold rolled or cold drawn), ruling section 2 1/2 in (lowest-strength condition of the standard) Hot rolled or normalized bars, billets and forgings (Table 2), ruling sections up to 150 mm
Can BS 970 EN1B Be Substituted With IS 1570 (Part 3) 10C8S10?
BS 970 EN1B and IS 1570 (Part 3) 10C8S10 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 EN1B
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IS 1570 (Part 3) 10C8S10
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Frequently Asked Questions
What is the difference between BS 970 EN1B 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 EN1B be substituted with IS 1570 (Part 3) 10C8S10?
BS 970 EN1B and IS 1570 (Part 3) 10C8S10 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.