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IS 1570 C20 vs BS 970 (Part 1) 040A10

Close Alternative — 78.9% match based on chemical composition and mechanical property overlap.

IS 1570 C20 (IS 1570:1961) and BS 970 (Part 1) 040A10 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Carbon Steel category. IS 1570 C20 is typically used for shafts, studs, pins, forged components, machinery parts, carburized parts, while BS 970 (Part 1) 040A10 is commonly used for used for bolts, studs, shafts, brackets, fabricated components, and general engineering parts.. IS 1570 C20 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 1) 040A10 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 1570 C20 vs BS 970 (Part 1) 040A10 is a 78.9% 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 78.9%.

Frequently Compared With IS 1570 C20:
BS 970 (Part 1) 080A20 BS 970 (Part 3) 070M55 BS 970 (Part 3) 070M20 BS 970 (Part 3) 045M10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 070M20 BS 970 (Part 1) 040A12
Match Breakdown
CHEMISTRY MATCH
78.9%
MECHANICAL MATCH
No shared data
OVERALL
78.9%
Specifications
Property IS 1570 C20 BS 970 (Part 1) 040A10
Standard IS 1570:1961 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.15-0.25 0.08-0.13
Mn (%) 0.60-0.90 0.30-0.50
Si (%) 0.15-0.35 Not specified
S (%) <=0.04 Not specified
P (%) <=0.04 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 IS 1570 C20 BS 970 (Part 1) 040A10
Tensile Strength 440-520 MPa Not specified
Yield Strength >=242 MPa Not specified
Elongation >=24% Not specified
Hardness 121-156 HB Not specified
Typical Applications
IS 1570 C20
shafts, studs, pins, forged components, machinery parts, carburized parts
BS 970 (Part 1) 040A10
Used for bolts, studs, shafts, brackets, fabricated components, and general engineering parts.
Key Differences
Can IS 1570 C20 Be Substituted With BS 970 (Part 1) 040A10?
IS 1570 C20 and BS 970 (Part 1) 040A10 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.
Forms & Sizes Available on M-EX
IS 1570 C20
Round Bar → (5 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 4900–6900 mm (192.91–271.65 in)
BS 970 (Part 1) 040A10
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 4700–5500 mm (185.04–216.54 in)
On M-EX Right Now
IS 1570 C20
5 active listings and RFQs →
BS 970 (Part 1) 040A10
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between IS 1570 C20 and BS 970 (Part 1) 040A10?
IS 1570 C20 specifies Si, S, P which are not specified for BS 970 (Part 1) 040A10.
Can IS 1570 C20 be substituted with BS 970 (Part 1) 040A10?
IS 1570 C20 and BS 970 (Part 1) 040A10 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.