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BS 970 EN4 vs BS 970 EN5A

Strong Match — 88.3% match based on chemical composition and mechanical property overlap.

BS 970 EN4 (BS 970:1955) and BS 970 EN5A (BS 970:1955) are both steel grades. Both fall under the Carbon Steel category. BS 970 EN4 is typically used for bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars (excluding cold drawn bars). suitable for a tensile range of 28/38 tons/sq in., while BS 970 EN5A is commonly used for axles, crankshafts, connecting rods. BS 970 EN4 is defined under British Standards (BS), originating from United Kingdom, while BS 970 EN5A is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 EN4 vs BS 970 EN5A is a 88.3% 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 88.3%.

Frequently Compared With BS 970 EN4:
BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A32 BS 970 (Part 1) 060A40 BS 970 (Part 1) 060A45 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 070M20
Match Breakdown
CHEMISTRY MATCH
88.3%
MECHANICAL MATCH
No shared data
OVERALL
88.3%
Specifications
Property BS 970 EN4 BS 970 EN5A
Standard BS 970:1955 BS 970:1955
Category Carbon Steel Carbon Steel
C (%) <=0.30 0.25-0.30
Si (%) 0.05-0.35 0.05-0.35
Mn (%) <=1.00 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 EN4 BS 970 EN5A
Tensile Strength 432-587 MPa (28-38 tons/sq in, converted) Not specified
Elongation ≥25% Not specified
Hardness 126-179 HB Not specified
Condition ruling section 6 in (lowest-strength condition of the standard) Not specified
Typical Applications
BS 970 EN4
Bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars (excluding cold drawn bars). Suitable for a tensile range of 28/38 tons/sq in.
BS 970 EN5A
Axles, crankshafts, connecting rods
Can BS 970 EN4 Be Substituted With BS 970 EN5A?
BS 970 EN4 and BS 970 EN5A overlap closely enough on chemistry and mechanical properties that BS 970 EN5A is often considered as a substitute for BS 970 EN4 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 EN4
No active listings currently.
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)
On M-EX Right Now
BS 970 EN4
0 active listings and RFQs →
BS 970 EN5A
3 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN4 and BS 970 EN5A?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN4 be substituted with BS 970 EN5A?
BS 970 EN4 and BS 970 EN5A overlap closely enough on chemistry and mechanical properties that BS 970 EN5A is often considered as a substitute for BS 970 EN4 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.