Strong Match — 99.4% match
based on chemical composition and mechanical property overlap.
BS 970 EN5K (BS 970:1955) and BS 970 EN5 (BS 970:1955) are both steel grades.
Both fall under the Carbon Steel category.
BS 970 EN5K is typically 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., while BS 970 EN5 is commonly used for gears, shafts, couplings, general engineering.
BS 970 EN5K is defined under British Standards (BS), originating from United Kingdom, while BS 970 EN5 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, BS 970 EN5K vs BS 970 EN5 is a 99% match.
As per mechanical properties, the match is 100%.
Combined, this makes them a strong match overall at 99.4%.
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 EN5K
BS 970 EN5
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 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.
BS 970 EN5
Gears, shafts, couplings, general engineering
Can BS 970 EN5K Be Substituted With BS 970 EN5?
BS 970 EN5K and BS 970 EN5 overlap closely enough on chemistry and mechanical properties that BS 970 EN5 is often considered as a substitute for BS 970 EN5K in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
What is the difference between BS 970 EN5K and BS 970 EN5?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN5K be substituted with BS 970 EN5?
BS 970 EN5K and BS 970 EN5 overlap closely enough on chemistry and mechanical properties that BS 970 EN5 is often considered as a substitute for BS 970 EN5K in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.