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BS 970 EN5A vs BS 970 EN8A

Strong Match — 91.4% match based on chemical composition and mechanical property overlap.

BS 970 EN5A (BS 970:1955) and BS 970 EN8A (BS 970:1955) are both steel grades. Both fall under the Carbon Steel category. BS 970 EN5A is typically used for axles, crankshafts, connecting rods, while BS 970 EN8A is commonly used for shafts, axles, gears, studs. BS 970 EN5A is defined under British Standards (BS), originating from United Kingdom, while BS 970 EN8A is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 EN5A vs BS 970 EN8A is a 91.4% 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 91.4%.

Frequently Compared With BS 970 EN5A:
BS 970 (Part 1) 040A10 BS 970 (Part 3) 070M55 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 060A32 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15
Match Breakdown
CHEMISTRY MATCH
91.4%
MECHANICAL MATCH
No shared data
OVERALL
91.4%
Specifications
Property BS 970 EN5A BS 970 EN8A
Standard BS 970:1955 BS 970:1955
Category Carbon Steel Carbon Steel
C (%) 0.25-0.30 0.33-0.38
Si (%) 0.05-0.35 0.05-0.35
Mn (%) 0.70-0.90 0.70-0.90
S (%) <=0.060 <=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 EN5A BS 970 EN8A
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 NGC 1, Normalised, ruling section 6 in (lowest-strength condition of the standard)
Typical Applications
BS 970 EN5A
Axles, crankshafts, connecting rods
BS 970 EN8A
Shafts, axles, gears, studs
Can BS 970 EN5A Be Substituted With BS 970 EN8A?
BS 970 EN5A and BS 970 EN8A overlap closely enough on chemistry and mechanical properties that BS 970 EN8A is often considered as a substitute for BS 970 EN5A 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 EN5A
Round Bar → (3 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 6200–6800 mm (244.09–267.72 in)
BS 970 EN8A
Round Bar → (3 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 5300–6500 mm (208.66–255.91 in)
On M-EX Right Now
BS 970 EN5A
3 active listings and RFQs →
BS 970 EN8A
3 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN5A and BS 970 EN8A?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN5A be substituted with BS 970 EN8A?
BS 970 EN5A and BS 970 EN8A overlap closely enough on chemistry and mechanical properties that BS 970 EN8A is often considered as a substitute for BS 970 EN5A in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.