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BS 970 (Part 3) 080M40 vs BS 970 EN8K

Strong Match — 96.7% match based on chemical composition and mechanical property overlap.

BS 970 (Part 3) 080M40 (BS 970 (Part 3):1991) and BS 970 EN8K (BS 970:1955) 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 BS 970 EN8K is commonly used for bars and billets for forging; forgings; bars for machining.. BS 970 (Part 3) 080M40 is defined under British Standards (BS), originating from United Kingdom, while BS 970 EN8K is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 (Part 3) 080M40 vs BS 970 EN8K is a 96.7% 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 96.7%.

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
96.7%
MECHANICAL MATCH
No shared data
OVERALL
96.7%
Specifications
Property BS 970 (Part 3) 080M40 BS 970 EN8K
Standard BS 970 (Part 3):1991 BS 970:1955
Category Carbon Steel Carbon Steel
C (%) 0.36-0.44 0.35-0.45
Si (%) 0.10-0.40 0.05-0.35
Mn (%) 0.60-1.00 0.60-1.00
P (%) <=0.05 <=0.050
S (%) <=0.05 <=0.050
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 BS 970 EN8K
Tensile Strength Not specified ≥541 MPa (35 tons/sq in, converted)
Yield Strength Not specified ≥278 MPa (18 tons/sq in, converted)
Elongation Not specified ≥20%
Hardness Not specified 152-207 HB
Condition Not specified Normalised, ruling section 6 in (lowest-strength condition of the standard)
Typical Applications
BS 970 (Part 3) 080M40
Shafts, gears, axles, general engineering
BS 970 EN8K
Bars and billets for forging; forgings; bars for machining.
Can BS 970 (Part 3) 080M40 Be Substituted With BS 970 EN8K?
BS 970 (Part 3) 080M40 and BS 970 EN8K overlap closely enough on chemistry and mechanical properties that BS 970 EN8K 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)
BS 970 EN8K
No active listings currently.
On M-EX Right Now
BS 970 (Part 3) 080M40
2 active listings and RFQs →
BS 970 EN8K
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 (Part 3) 080M40 and BS 970 EN8K?
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 BS 970 EN8K?
BS 970 (Part 3) 080M40 and BS 970 EN8K overlap closely enough on chemistry and mechanical properties that BS 970 EN8K 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.