Photo · wire-macro · 1:1
Medium carbon · BS 970
Medium-carbon steel for parts that carry real load.
080A42C40Ø 4 – 19 mm
Why this grade
At about 0.4 % carbon, EN8D responds to hardening and tempering and can be induction hardened on the surface. Drawn bright, it gives strong shafts and studs with a finish ready for machining.
Axles and shafts
Studs, bolts and tie rods
Gear blanks and couplings
Crank and lever pins
Behaviour
Cold heading3/5
Machinability3/5
Hardenability3/5
Strength potential4/5
Relative comparison across the grades we supply.
Chemistry
C0.36 – 0.44
Mn0.60 – 1.00
Si0.10 – 0.40
S≤ 0.05
P≤ 0.05
Typical ranges per BS 970. Actual values per mill test certificate.
Properties
MicrostructureFerrite + pearlite
Typical tensile (normalised)≈ 550 – 700 MPa
Surface hardeningInduction / flame
How we anneal it
Spheroidise anneal
Turns plate-like carbides round, so the wire can be cold forged without cracking and machined more easily.
Annealing explainedEnquiries
We come back with availability and a quotation — usually the same working day.