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BS 970 (Part 3) 070M55 vs IS 5517 55C8

Strong Match — 95.9% match based on chemical composition and mechanical property overlap.

BS 970 (Part 3) 070M55 (BS 970 (Part 3):1991) and IS 5517 55C8 (IS 5517:1993) are both steel grades. Both fall under the Carbon Steel category. BS 970 (Part 3) 070M55 is defined under British Standards (BS), originating from United Kingdom, while IS 5517 55C8 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, BS 970 (Part 3) 070M55 vs IS 5517 55C8 is a 95.9% 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 95.9%.

Frequently Compared With BS 970 (Part 3) 070M55:
BS 970 (Part 1) 040A10 BS 970 (Part 1) 080A20 BS 970 (Part 1) 040A12 BS 970 (Part 3) 045A10 BS 970 (Part 1) 070M55 BS 970 (Part 1) 045A10 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045M10 BS 970 (Part 1) 060A32 BS 970 (Part 1) 055M15 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10
Match Breakdown
CHEMISTRY MATCH
95.9%
MECHANICAL MATCH
No shared data
OVERALL
95.9%
Specifications
Property BS 970 (Part 3) 070M55 IS 5517 55C8
Standard BS 970 (Part 3):1991 IS 5517:1993
Category Carbon Steel Carbon Steel
C (%) 0.50-0.60 0.50-0.60
Si (%) 0.10-0.40 0.10-0.35
Mn (%) 0.50-0.90 0.60-0.90
P (%) <=0.05 <=0.035
S (%) <=0.05 <=0.035
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property BS 970 (Part 3) 070M55 IS 5517 55C8
Tensile Strength Not specified 700-850 MPa
Yield Strength (0.2% proof) Not specified 460 MPa min
Elongation Not specified >=15%
Hardness (annealed) Not specified <=220 HB
Condition Not specified Hardened and tempered, ruling section up to 63 mm
Typical Applications
BS 970 (Part 3) 070M55
Used for springs, blades, wear plates, hand tools, shafts, and cutting components.
IS 5517 55C8
Not documented
Can BS 970 (Part 3) 070M55 Be Substituted With IS 5517 55C8?
BS 970 (Part 3) 070M55 and IS 5517 55C8 overlap closely enough on chemistry and mechanical properties that IS 5517 55C8 is often considered as a substitute for BS 970 (Part 3) 070M55 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
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)
IS 5517 55C8
No active listings currently.
On M-EX Right Now
BS 970 (Part 3) 070M55
2 active listings and RFQs →
IS 5517 55C8
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 (Part 3) 070M55 and IS 5517 55C8?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 (Part 3) 070M55 be substituted with IS 5517 55C8?
BS 970 (Part 3) 070M55 and IS 5517 55C8 overlap closely enough on chemistry and mechanical properties that IS 5517 55C8 is often considered as a substitute for BS 970 (Part 3) 070M55 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.