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BS 970 (Part 3) 080M40 vs JIS G4051 S40C

Strong Match — 92.5% match based on chemical composition and mechanical property overlap.

BS 970 (Part 3) 080M40 (BS 970 (Part 3):1991) and JIS G4051 S40C (JIS G4051:2009) 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 JIS G4051 S40C is commonly used for shafts, gears, bolts, couplings, machine parts. BS 970 (Part 3) 080M40 is defined under British Standards (BS), originating from United Kingdom, while JIS G4051 S40C is defined under Japanese Industrial Standards (JIS), originating from Japan.

As per chemical composition, BS 970 (Part 3) 080M40 vs JIS G4051 S40C is a 92.5% 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 92.5%.

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) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 060A32
Match Breakdown
CHEMISTRY MATCH
92.5%
MECHANICAL MATCH
No shared data
OVERALL
92.5%
Specifications
Property BS 970 (Part 3) 080M40 JIS G4051 S40C
Standard BS 970 (Part 3):1991 JIS G4051:2009
Category Carbon Steel Carbon Steel
C (%) 0.36-0.44 0.37-0.43
Si (%) 0.10-0.40 0.15-0.35
Mn (%) 0.60-1.00 0.60-0.90
P (%) <=0.05 <=0.030
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) 080M40 JIS G4051 S40C
Tensile Strength Not specified >=570 MPa
Yield Strength Not specified >=390 MPa
Elongation Not specified >=17%
Hardness Not specified <=179 HB
Typical Applications
BS 970 (Part 3) 080M40
Shafts, gears, axles, general engineering
JIS G4051 S40C
Shafts, gears, bolts, couplings, machine parts
Can BS 970 (Part 3) 080M40 Be Substituted With JIS G4051 S40C?
BS 970 (Part 3) 080M40 and JIS G4051 S40C overlap closely enough on chemistry and mechanical properties that JIS G4051 S40C 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)
JIS G4051 S40C
Round Bar → (3 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 6100–6600 mm (240.16–259.84 in)
On M-EX Right Now
BS 970 (Part 3) 080M40
2 active listings and RFQs →
JIS G4051 S40C
3 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 (Part 3) 080M40 and JIS G4051 S40C?
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) 080M40 be substituted with JIS G4051 S40C?
BS 970 (Part 3) 080M40 and JIS G4051 S40C overlap closely enough on chemistry and mechanical properties that JIS G4051 S40C 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.