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BS 970 EN3 vs BS 970 EN4

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

BS 970 EN3 (BS 970:1955) and BS 970 EN4 (BS 970:1955) are both steel grades. Both fall under the Carbon Steel category. BS 970 EN3 is typically used for bars and billets for forging; forgings and drop-forgings; bars for machining. suitable for a tensile range of 25/35 tons/sq in., while BS 970 EN4 is commonly 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.. BS 970 EN3 is defined under British Standards (BS), originating from United Kingdom, while BS 970 EN4 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 EN3 vs BS 970 EN4 is a 98.6% match. As per mechanical properties, the match is 77.1%. Combined, this makes them a strong match overall at 91.4%.

Frequently Compared With BS 970 EN3:
BS 970 (Part 1) 040A12 BS 970 (Part 1) 045M10 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045A10 BS 970 (Part 3) 070M20 BS 970 (Part 1) 040A10 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A32 BS 970 (Part 1) 060A40
Match Breakdown
CHEMISTRY MATCH
98.6%
MECHANICAL MATCH
77.1%
OVERALL
91.4%
Specifications
Property BS 970 EN3 BS 970 EN4
Standard BS 970:1955 BS 970:1955
Category Carbon Steel Carbon Steel
C (%) <=0.25 <=0.30
Si (%) 0.05-0.35 0.05-0.35
Mn (%) <=1.00 <=1.00
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 EN3 BS 970 EN4
Tensile Strength 386-541 MPa (25-35 tons/sq in, converted) 432-587 MPa (28-38 tons/sq in, converted)
Elongation ≥25% ≥25%
Condition , ruling section 6 in (lowest-strength condition of the standard) ruling section 6 in (lowest-strength condition of the standard)
Hardness Not specified 126-179 HB
Typical Applications
BS 970 EN3
Bars and billets for forging; forgings and drop-forgings; bars for machining. Suitable for a tensile range of 25/35 tons/sq in.
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.
Can BS 970 EN3 Be Substituted With BS 970 EN4?
BS 970 EN3 and BS 970 EN4 overlap closely enough on chemistry and mechanical properties that BS 970 EN4 is often considered as a substitute for BS 970 EN3 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
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BS 970 EN3
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BS 970 EN4
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Frequently Asked Questions
What is the difference between BS 970 EN3 and BS 970 EN4?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN3 be substituted with BS 970 EN4?
BS 970 EN3 and BS 970 EN4 overlap closely enough on chemistry and mechanical properties that BS 970 EN4 is often considered as a substitute for BS 970 EN3 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.