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BS 970 EN8 vs BS 970 (Part 3) 080M40

Strong Match — 95.7% match based on chemical composition and mechanical property overlap.

BS 970 EN8 (BS 970:1955) and BS 970 (Part 3) 080M40 (BS 970 (Part 3):1991) are both steel grades. Both fall under the Carbon Steel category. BS 970 EN8 is typically used for shafts, gears, studs, keys, general machined parts, while BS 970 (Part 3) 080M40 is commonly used for shafts, gears, axles, general engineering. BS 970 EN8 is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 3) 080M40 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 EN8 vs BS 970 (Part 3) 080M40 is a 95.7% 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 95.7%.

Frequently Compared With BS 970 EN8:
BS 970 (Part 1) 040A10 BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A12 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A32 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10
Match Breakdown
CHEMISTRY MATCH
95.7%
MECHANICAL MATCH
No shared data
OVERALL
95.7%
Specifications
Property BS 970 EN8 BS 970 (Part 3) 080M40
Standard BS 970:1955 BS 970 (Part 3):1991
Category Carbon Steel Carbon Steel
C (%) 0.35-0.45 0.36-0.44
Si (%) 0.05-0.35 0.10-0.40
Mn (%) 0.60-1.00 0.60-1.00
S (%) <=0.060 <=0.05
P (%) <=0.060 <=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 BS 970 EN8 BS 970 (Part 3) 080M40
Tensile Strength ≥541 MPa (35 tons/sq in, converted) Not specified
Yield Strength ≥278 MPa (18 tons/sq in, converted) Not specified
Elongation ≥20% Not specified
Hardness 152-207 HB Not specified
Condition NGC 1, Normalised, ruling section 6 in (lowest-strength condition of the standard) Not specified
Typical Applications
BS 970 EN8
Shafts, gears, studs, keys, general machined parts
BS 970 (Part 3) 080M40
Shafts, gears, axles, general engineering
Can BS 970 EN8 Be Substituted With BS 970 (Part 3) 080M40?
BS 970 EN8 and BS 970 (Part 3) 080M40 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 080M40 is often considered as a substitute for BS 970 EN8 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 EN8
Round Bar → (30 listings)
Diameter: 32–70 mm (1.26–2.76 in)
Length: 4800–7000 mm (188.98–275.59 in)
Square Bar → (6 listings)
Size: 30–40 mm (1.18–1.57 in)
Length: 4900–6600 mm (192.91–259.84 in)
Forging → (6 listings)
Diameter: 150–150 mm (5.91–5.91 in)
Length: 500–800 mm (19.69–31.5 in)
Wire Rod Coil → (4 listings)
Diameter: 10–12 mm (0.39–0.47 in)
Flat Bar → (4 listings)
Thickness: 30–30 mm (1.18–1.18 in)
Width: 150–150 mm (5.91–5.91 in)
Length: 3100–6500 mm (122.05–255.91 in)
Hollow Bar → (3 listings)
OD: 120–120 mm (4.72–4.72 in)
ID: 60–60 mm (2.36–2.36 in)
Length: 5500–6500 mm (216.54–255.91 in)
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)
On M-EX Right Now
BS 970 EN8
53 active listings and RFQs →
BS 970 (Part 3) 080M40
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN8 and BS 970 (Part 3) 080M40?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN8 be substituted with BS 970 (Part 3) 080M40?
BS 970 EN8 and BS 970 (Part 3) 080M40 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 080M40 is often considered as a substitute for BS 970 EN8 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.