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BS 970 (Part 3) 080M40 vs IS 11169 (Part 1) 40C8

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

BS 970 (Part 3) 080M40 (BS 970 (Part 3):1991) and IS 11169 (Part 1) 40C8 (IS 11169 (Part 1):1984) are both steel grades. Both fall under the Carbon Steel category. BS 970 (Part 3) 080M40 is typically used for shafts, gears, axles, general engineering, while IS 11169 (Part 1) 40C8 is commonly used for cold heading and cold extrusion; the standard covers wires, wire rods and bars of 2 to 100 mm diameter (clause 1.1). BS 970 (Part 3) 080M40 is defined under British Standards (BS), originating from United Kingdom, while IS 11169 (Part 1) 40C8 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, BS 970 (Part 3) 080M40 vs IS 11169 (Part 1) 40C8 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) 080M40:
BS 970 (Part 1) 040A10 BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A12 BS 970 (Part 3) 045A10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 060A32
Match Breakdown
CHEMISTRY MATCH
95.9%
MECHANICAL MATCH
No shared data
OVERALL
95.9%
Specifications
Property BS 970 (Part 3) 080M40 IS 11169 (Part 1) 40C8
Standard BS 970 (Part 3):1991 IS 11169 (Part 1):1984
Category Carbon Steel Carbon Steel
C (%) 0.36-0.44 0.35-0.45
Si (%) 0.10-0.40 0.10-0.35
Mn (%) 0.60-1.00 0.60-0.90
P (%) <=0.05 Not specified
S (%) <=0.05 Not specified
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) 080M40 IS 11169 (Part 1) 40C8
Tensile Strength (hardened and tempered) Not specified 660-810 MPa (16 mm) / 620-770 MPa (40 mm) / 580-730 MPa (100 mm)
0.2% Proof Stress Not specified >=450 MPa (16 mm) / >=390 MPa (40 mm) / >=340 MPa (100 mm)
Elongation Not specified >=16% (16 mm) / >=18% (40 mm) / >=19% (100 mm)
Hardness, annealed Not specified <=170 HB
Typical Applications
BS 970 (Part 3) 080M40
Shafts, gears, axles, general engineering
IS 11169 (Part 1) 40C8
Cold heading and cold extrusion; the standard covers wires, wire rods and bars of 2 to 100 mm diameter (clause 1.1)
Key Differences
Can BS 970 (Part 3) 080M40 Be Substituted With IS 11169 (Part 1) 40C8?
BS 970 (Part 3) 080M40 and IS 11169 (Part 1) 40C8 overlap closely enough on chemistry and mechanical properties that IS 11169 (Part 1) 40C8 is often considered as a substitute for BS 970 (Part 3) 080M40 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) 080M40
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 6000–6900 mm (236.22–271.65 in)
IS 11169 (Part 1) 40C8
No active listings currently.
On M-EX Right Now
BS 970 (Part 3) 080M40
2 active listings and RFQs →
IS 11169 (Part 1) 40C8
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 (Part 3) 080M40 and IS 11169 (Part 1) 40C8?
BS 970 (Part 3) 080M40 specifies P, S which are not specified for IS 11169 (Part 1) 40C8.
Can BS 970 (Part 3) 080M40 be substituted with IS 11169 (Part 1) 40C8?
BS 970 (Part 3) 080M40 and IS 11169 (Part 1) 40C8 overlap closely enough on chemistry and mechanical properties that IS 11169 (Part 1) 40C8 is often considered as a substitute for BS 970 (Part 3) 080M40 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.