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IS 1570 C20 vs SAE J403 1021

Strong Match — 88.7% match based on chemical composition and mechanical property overlap.

IS 1570 C20 (IS 1570:1961) and SAE J403 1021 (SAE J403:2001) 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 SAE J403 1021 is commonly used for chemistry-only grade; product scope as listed in the composition notes. IS 1570 C20 is defined under Bureau of Indian Standards (IS), originating from India, while SAE J403 1021 is defined under SAE International, originating from United States.

As per chemical composition, IS 1570 C20 vs SAE J403 1021 is a 88.7% 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 88.7%.

Frequently Compared With IS 1570 C20:
BS 970 (Part 1) 040A10 BS 970 (Part 3) 070M55 BS 970 (Part 3) 070M20 BS 970 (Part 3) 045M10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 070M20 BS 970 (Part 1) 040A12
Match Breakdown
CHEMISTRY MATCH
88.7%
MECHANICAL MATCH
No shared data
OVERALL
88.7%
Specifications
Property IS 1570 C20 SAE J403 1021
Standard IS 1570:1961 SAE J403:2001
Category Carbon Steel Carbon Steel
C (%) 0.15-0.25 0.18-0.23
Mn (%) 0.60-0.90 0.60-0.90
Si (%) 0.15-0.35 Not specified
S (%) <=0.04 <=0.050
P (%) <=0.04 <=0.030
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 SAE J403 1021
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
SAE J403 1021
Chemistry-only grade; product scope as listed in the composition notes
Key Differences
Can IS 1570 C20 Be Substituted With SAE J403 1021?
IS 1570 C20 and SAE J403 1021 overlap closely enough on chemistry and mechanical properties that SAE J403 1021 is often considered as a substitute for IS 1570 C20 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
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)
SAE J403 1021
No active listings currently.
On M-EX Right Now
IS 1570 C20
5 active listings and RFQs →
SAE J403 1021
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between IS 1570 C20 and SAE J403 1021?
IS 1570 C20 specifies Si which is not specified for SAE J403 1021.
Can IS 1570 C20 be substituted with SAE J403 1021?
IS 1570 C20 and SAE J403 1021 overlap closely enough on chemistry and mechanical properties that SAE J403 1021 is often considered as a substitute for IS 1570 C20 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.