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BS 970 EN5 vs BS 970 EN5K

Strong Match — 99.4% match based on chemical composition and mechanical property overlap.

BS 970 EN5 (BS 970:1955) and BS 970 EN5K (BS 970:1955) are both steel grades. Both fall under the Carbon Steel category. BS 970 EN5 is typically used for gears, shafts, couplings, general engineering, while BS 970 EN5K is commonly used for bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars (excluding cold drawn bars). en 5k is intended for special applications only. same tensile ranges as en 5.. BS 970 EN5 is defined under British Standards (BS), originating from United Kingdom, while BS 970 EN5K is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 EN5 vs BS 970 EN5K is a 99% match. As per mechanical properties, the match is 100%. Combined, this makes them a strong match overall at 99.4%.

Frequently Compared With BS 970 EN5:
BS 970 (Part 1) 040A10 BS 970 (Part 3) 070M55 BS 970 (Part 1) 060A32 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 070M26 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10
Match Breakdown
CHEMISTRY MATCH
99%
MECHANICAL MATCH
100%
OVERALL
99.4%
Specifications
Property BS 970 EN5 BS 970 EN5K
Standard BS 970:1955 BS 970:1955
Category Carbon Steel Carbon Steel
C (%) 0.25-0.35 0.25-0.35
Si (%) 0.05-0.35 0.05-0.35
Mn (%) 0.60-1.00 0.60-1.00
S (%) <=0.060 <=0.050
P (%) <=0.060 <=0.050
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 EN5 BS 970 EN5K
Tensile Strength ≥494 MPa (32 tons/sq in, converted) ≥494 MPa (32 tons/sq in, converted)
Yield Strength ≥247 MPa (16 tons/sq in, converted) ≥247 MPa (16 tons/sq in, converted)
Elongation ≥25% ≥25%
Hardness 143-193 HB 143-193 HB
Condition Normalised, ruling section 2 1/2 in (lowest-strength condition of the standard) Normalised, ruling section 2 1/2 in (lowest-strength condition of the standard)
Typical Applications
BS 970 EN5
Gears, shafts, couplings, general engineering
BS 970 EN5K
Bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars (excluding cold drawn bars). En 5K is intended for special applications only. Same tensile ranges as En 5.
Can BS 970 EN5 Be Substituted With BS 970 EN5K?
BS 970 EN5 and BS 970 EN5K overlap closely enough on chemistry and mechanical properties that BS 970 EN5K is often considered as a substitute for BS 970 EN5 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 EN5
Round Bar → (3 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5500–6600 mm (216.54–259.84 in)
Square Bar → (3 listings)
Size: 25–25 mm (0.98–0.98 in)
Length: 5800–7000 mm (228.35–275.59 in)
BS 970 EN5K
No active listings currently.
On M-EX Right Now
BS 970 EN5
6 active listings and RFQs →
BS 970 EN5K
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Frequently Asked Questions
What is the difference between BS 970 EN5 and BS 970 EN5K?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN5 be substituted with BS 970 EN5K?
BS 970 EN5 and BS 970 EN5K overlap closely enough on chemistry and mechanical properties that BS 970 EN5K is often considered as a substitute for BS 970 EN5 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.