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BS 970 (Part 1) 212A37 vs IS 1570 (Part 3) 40C10S18

Strong Match — 90.5% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 212A37 (BS 970 (Part 1):1983) and IS 1570 (Part 3) 40C10S18 (IS 1570 (Part 3):1979) are both steel grades. Both fall under the Free Machining Steel category. BS 970 (Part 1) 212A37 is defined under British Standards (BS), originating from United Kingdom, while IS 1570 (Part 3) 40C10S18 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, BS 970 (Part 1) 212A37 vs IS 1570 (Part 3) 40C10S18 is a 90.5% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a strong match overall at 90.5%.

Frequently Compared With BS 970 (Part 1) 212A37:
IS 1570 (Part 3) 10C8S10 SAE J403 1126 SAE J403 1132 SAE J403 1117 SAE J403 1117 SAE J403 1118 SAE J403 1118 SAE J403 1126 SAE J403 1132 IS 4432 10C8S10 SAE J403 1117 SAE J403 1118
Match Breakdown
CHEMISTRY MATCH
90.5%
MECHANICAL MATCH
No shared data
OVERALL
90.5%
Specifications
Property BS 970 (Part 1) 212A37 IS 1570 (Part 3) 40C10S18
Standard BS 970 (Part 1):1983 IS 1570 (Part 3):1979
Category Free Machining Steel Free Machining Steel
C (%) 0.35-0.40 0.35-0.45
Mn (%) 1.00-1.30 0.80-1.20
Si (%) <=0.25 <=0.25
P (%) <=0.060 <=0.060
S (%) 0.12-0.20 0.14-0.22
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 (Part 1) 212A37 IS 1570 (Part 3) 40C10S18
Tensile Strength Not specified 550-650 MPa
Elongation Not specified >=17%
Condition Not specified Hot rolled or normalized bars, billets and forgings (Table 2), ruling sections up to 150 mm
Typical Applications
BS 970 (Part 1) 212A37
Through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of Table 6.
IS 1570 (Part 3) 40C10S18
Not documented
Can BS 970 (Part 1) 212A37 Be Substituted With IS 1570 (Part 3) 40C10S18?
BS 970 (Part 1) 212A37 and IS 1570 (Part 3) 40C10S18 overlap closely enough on chemistry and mechanical properties that IS 1570 (Part 3) 40C10S18 is often considered as a substitute for BS 970 (Part 1) 212A37 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
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BS 970 (Part 1) 212A37
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IS 1570 (Part 3) 40C10S18
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 212A37 and IS 1570 (Part 3) 40C10S18?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 (Part 1) 212A37 be substituted with IS 1570 (Part 3) 40C10S18?
BS 970 (Part 1) 212A37 and IS 1570 (Part 3) 40C10S18 overlap closely enough on chemistry and mechanical properties that IS 1570 (Part 3) 40C10S18 is often considered as a substitute for BS 970 (Part 1) 212A37 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.