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IS 1570 (Part 2/Sec 1) 20C8 vs BS 970 (Part 1) 040A04

Close Alternative — 84.9% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 2/Sec 1) 20C8 (IS 1570 (Part 2/Sec 1):1979) and BS 970 (Part 1) 040A04 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Carbon Steel category. IS 1570 (Part 2/Sec 1) 20C8 is typically used for billets and bars for forgings and carbon steel forgings (the standard links this grade to is 1875, is 2004), while BS 970 (Part 1) 040A04 is commonly used for as-rolled, or as-rolled and softened, steel (section two). IS 1570 (Part 2/Sec 1) 20C8 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 1) 040A04 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 1570 (Part 2/Sec 1) 20C8 vs BS 970 (Part 1) 040A04 is a 85.7% 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 84.9%.

Frequently Compared With IS 1570 (Part 2/Sec 1) 20C8:
BS 970 (Part 3) 070M55 BS 970 (Part 1) 080A20 BS 970 (Part 1) 040A10 BS 970 (Part 1) 070M20 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15
Match Breakdown
CHEMISTRY MATCH
85.7%
MECHANICAL MATCH
No shared data
OVERALL
84.9%
Specifications
Property IS 1570 (Part 2/Sec 1) 20C8 BS 970 (Part 1) 040A04
Standard IS 1570 (Part 2/Sec 1):1979 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.15-0.25 <=0.08
Mn (%) 0.60-0.90 0.30-0.50
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 2/Sec 1) 20C8 BS 970 (Part 1) 040A04
Tensile Strength 440-520 MPa Not specified
Elongation >=24% Not specified
Typical Applications
IS 1570 (Part 2/Sec 1) 20C8
Billets and bars for forgings and carbon steel forgings (the standard links this grade to IS 1875, IS 2004)
BS 970 (Part 1) 040A04
As-rolled, or as-rolled and softened, steel (section two)
Can IS 1570 (Part 2/Sec 1) 20C8 Be Substituted With BS 970 (Part 1) 040A04?
IS 1570 (Part 2/Sec 1) 20C8 and BS 970 (Part 1) 040A04 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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IS 1570 (Part 2/Sec 1) 20C8
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BS 970 (Part 1) 040A04
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Frequently Asked Questions
What is the difference between IS 1570 (Part 2/Sec 1) 20C8 and BS 970 (Part 1) 040A04?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can IS 1570 (Part 2/Sec 1) 20C8 be substituted with BS 970 (Part 1) 040A04?
IS 1570 (Part 2/Sec 1) 20C8 and BS 970 (Part 1) 040A04 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.