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BS 970 EN8CM vs BS 970 EN8D

Strong Match — 89.4% match based on chemical composition and mechanical property overlap.

BS 970 EN8CM (BS 970:1955) and BS 970 EN8D (BS 970:1955) are both steel grades. Both fall under the Carbon Steel category. BS 970 EN8CM is defined under British Standards (BS), originating from United Kingdom, while BS 970 EN8D is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 EN8CM vs BS 970 EN8D is a 84.1% match. As per mechanical properties, the match is 100%. Combined, this makes them a strong match overall at 89.4%.

Frequently Compared With BS 970 EN8CM:
BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045M10 BS 970 (Part 1) 060A40 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 040A10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A32
Match Breakdown
CHEMISTRY MATCH
84.1%
MECHANICAL MATCH
100%
OVERALL
89.4%
Specifications
Property BS 970 EN8CM BS 970 EN8D
Standard BS 970:1955 BS 970:1955
Category Carbon Steel Carbon Steel
C (%) 0.38-0.43 0.40-0.45
Si (%) <=0.25 0.05-0.35
Mn (%) 0.90-1.30 0.70-0.90
S (%) 0.12-0.20 <=0.060
P (%) <=0.060 <=0.060
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 EN8CM BS 970 EN8D
Tensile Strength ≥541 MPa (35 tons/sq in, converted) ≥541 MPa (35 tons/sq in, converted)
Yield Strength ≥278 MPa (18 tons/sq in, converted) ≥278 MPa (18 tons/sq in, converted)
Elongation ≥20% ≥20%
Hardness 152-207 HB 152-207 HB
Condition Normalised, ruling section 6 in (lowest-strength condition of the standard) NGC 1, Normalised, ruling section 6 in (lowest-strength condition of the standard)
Typical Applications
BS 970 EN8CM
Not documented
BS 970 EN8D
Dynamo and motor shafts; after heat treatment bolts, studs, crankshafts, connecting rods, flanges, railway couplings, axles and brackets
Can BS 970 EN8CM Be Substituted With BS 970 EN8D?
BS 970 EN8CM and BS 970 EN8D overlap closely enough on chemistry and mechanical properties that BS 970 EN8D is often considered as a substitute for BS 970 EN8CM 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 EN8CM
No active listings currently.
BS 970 EN8D
Round Bar → (4 listings)
Diameter: 40–55 mm (1.57–2.17 in)
Length: 5500–7000 mm (216.54–275.59 in)
On M-EX Right Now
BS 970 EN8CM
0 active listings and RFQs →
BS 970 EN8D
4 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN8CM and BS 970 EN8D?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN8CM be substituted with BS 970 EN8D?
BS 970 EN8CM and BS 970 EN8D overlap closely enough on chemistry and mechanical properties that BS 970 EN8D is often considered as a substitute for BS 970 EN8CM in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.