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IS 1570 (Part 4) 37C15 vs BS 970 (Part 3) 070M55

Close Alternative — 84.8% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 4) 37C15 (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) 37C15 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) 37C15 vs BS 970 (Part 3) 070M55 is a 84.8% 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 84.8%.

Frequently Compared With IS 1570 (Part 4) 37C15:
BS 970 (Part 1) 040A10 BS 970 (Part 1) 080A20 BS 970 (Part 1) 045M10 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 060A32 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 045M10
Match Breakdown
CHEMISTRY MATCH
84.8%
MECHANICAL MATCH
No shared data
OVERALL
84.8%
Specifications
Property IS 1570 (Part 4) 37C15 BS 970 (Part 3) 070M55
Standard IS 1570 (Part 4):1988 BS 970 (Part 3):1991
Category Carbon Steel Carbon Steel
C (%) 0.32-0.42 0.50-0.60
Si (%) 0.10-0.35 0.10-0.40
Mn (%) 1.30-1.70 0.50-0.90
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.
Mechanical Properties
Property IS 1570 (Part 4) 37C15 BS 970 (Part 3) 070M55
Tensile Strength 890-1040 MPa Not specified
Yield Strength >=650 MPa (0.2 % proof stress) Not specified
Elongation >=15% Not specified
Izod Impact >=41 J Not specified
Hardness 255-311 HBS (guidance only) Not specified
Condition Bars and forgings, hardened and tempered (oil hardened unless stated), limiting ruling section 15 mm Not specified
Typical Applications
IS 1570 (Part 4) 37C15
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) 37C15 Be Substituted With BS 970 (Part 3) 070M55?
IS 1570 (Part 4) 37C15 and BS 970 (Part 3) 070M55 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 (Part 4) 37C15
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) 37C15
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) 37C15 and BS 970 (Part 3) 070M55?
BS 970 (Part 3) 070M55 specifies P, S which are not specified for IS 1570 (Part 4) 37C15.
Can IS 1570 (Part 4) 37C15 be substituted with BS 970 (Part 3) 070M55?
IS 1570 (Part 4) 37C15 and BS 970 (Part 3) 070M55 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.