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IS 1570 (Part 4) 21C10BT vs BS 970 EN3C

Strong Match — 86.9% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 4) 21C10BT (IS 1570 (Part 4):1988) and BS 970 EN3C (BS 970:1955) are both steel grades. Both fall under the Carbon Steel category. IS 1570 (Part 4) 21C10BT is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 EN3C is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 1570 (Part 4) 21C10BT vs BS 970 EN3C is a 86.9% 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 86.9%.

Frequently Compared With IS 1570 (Part 4) 21C10BT:
BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A32 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10
Match Breakdown
CHEMISTRY MATCH
86.9%
MECHANICAL MATCH
No shared data
OVERALL
86.9%
Specifications
Property IS 1570 (Part 4) 21C10BT BS 970 EN3C
Standard IS 1570 (Part 4):1988 BS 970:1955
Category Carbon Steel Carbon Steel
C (%) 0.18-0.23 0.17-0.23
Si (%) 0.15-0.30 0.05-0.35
Mn (%) 0.80-1.1 0.60-1.00
B (%) 0.0005-0.003 Not specified
S (%) Not specified <=0.050
P (%) Not specified <=0.050
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 4) 21C10BT BS 970 EN3C
Tensile Strength Not specified ≥432 MPa (28 tons/sq in, converted)
Elongation Not specified ≥25%
Condition Not specified , ruling section 6 in (lowest-strength condition of the standard)
Typical Applications
IS 1570 (Part 4) 21C10BT
Not documented
BS 970 EN3C
Welded fabrications, light structural work
Key Differences
Can IS 1570 (Part 4) 21C10BT Be Substituted With BS 970 EN3C?
IS 1570 (Part 4) 21C10BT and BS 970 EN3C overlap closely enough on chemistry and mechanical properties that BS 970 EN3C is often considered as a substitute for IS 1570 (Part 4) 21C10BT 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 (Part 4) 21C10BT
No active listings currently.
BS 970 EN3C
Round Bar → (3 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 6200–6800 mm (244.09–267.72 in)
On M-EX Right Now
IS 1570 (Part 4) 21C10BT
0 active listings and RFQs →
BS 970 EN3C
3 active listings and RFQs →
Frequently Asked Questions
What is the difference between IS 1570 (Part 4) 21C10BT and BS 970 EN3C?
IS 1570 (Part 4) 21C10BT specifies B which is not specified for BS 970 EN3C. BS 970 EN3C specifies S, P which are not specified for IS 1570 (Part 4) 21C10BT.
Can IS 1570 (Part 4) 21C10BT be substituted with BS 970 EN3C?
IS 1570 (Part 4) 21C10BT and BS 970 EN3C overlap closely enough on chemistry and mechanical properties that BS 970 EN3C is often considered as a substitute for IS 1570 (Part 4) 21C10BT in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.