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IS 1570 (Part 4) 21C10BT vs BS 970 (Part 3) 070M55

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 4) 21C10BT (IS 1570 (Part 4):1988) and BS 970 (Part 3) 070M55 (BS 970 (Part 3):1991) 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 (Part 3) 070M55 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 1570 (Part 4) 21C10BT vs BS 970 (Part 3) 070M55 is a 78.4% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 69.9%.

Frequently Compared With IS 1570 (Part 4) 21C10BT:
BS 970 (Part 1) 080A20 BS 970 (Part 1) 040A10 BS 970 (Part 3) 045A10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 060A32 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045M10
Match Breakdown
CHEMISTRY MATCH
78.4%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property IS 1570 (Part 4) 21C10BT BS 970 (Part 3) 070M55
Standard IS 1570 (Part 4):1988 BS 970 (Part 3):1991
Category Carbon Steel Carbon Steel
C (%) 0.18-0.23 0.50-0.60
Si (%) 0.15-0.30 0.10-0.40
Mn (%) 0.80-1.1 0.50-0.90
B (%) 0.0005-0.003 Not specified
P (%) Not specified <=0.05
S (%) Not specified <=0.05
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Typical Applications
IS 1570 (Part 4) 21C10BT
Not documented
BS 970 (Part 3) 070M55
Used for springs, blades, wear plates, hand tools, shafts, and cutting components.
Key Differences
Can IS 1570 (Part 4) 21C10BT Be Substituted With BS 970 (Part 3) 070M55?
IS 1570 (Part 4) 21C10BT and BS 970 (Part 3) 070M55 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
Forms & Sizes Available on M-EX
IS 1570 (Part 4) 21C10BT
No active listings currently.
BS 970 (Part 3) 070M55
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 4800–5800 mm (188.98–228.35 in)
On M-EX Right Now
IS 1570 (Part 4) 21C10BT
0 active listings and RFQs →
BS 970 (Part 3) 070M55
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between IS 1570 (Part 4) 21C10BT and BS 970 (Part 3) 070M55?
IS 1570 (Part 4) 21C10BT specifies B which is not specified for BS 970 (Part 3) 070M55. BS 970 (Part 3) 070M55 specifies P, S which are not specified for IS 1570 (Part 4) 21C10BT.
Can IS 1570 (Part 4) 21C10BT be substituted with BS 970 (Part 3) 070M55?
IS 1570 (Part 4) 21C10BT and BS 970 (Part 3) 070M55 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.