EN8 (080A42) Engineering steel
EN8 is a medium carbon steel which is used in applications where better properties than mild steel are required, at a lower cost than an alloy, making this an excellent alternative to alloy.
This is an unalloyed carbon steel with reasonable tensile strength. By heat treating this engineering steel provides a good surface hardness. It can be flame or induction hardened and is a readily machinable material.
When heat treated it offers moderate wear resistance. It shares the same good mechanical properties of EN16 which is more resistant to shear loading and frictional wearing. Speak to High Peak Steels technical team for more details or to discuss a project.
C45 / C40 are European grades, offering similar characteristics and suitable for similar applications, as EN8 (080M40).
Steel stock range
High Peak Steels stock EN8 (080A42) Bright in round bar, square bar and hexagon.
Associated standards
UK Standard EN8 | European Grades C40 | Werkstoff 1.0511 | SAE/AISI 1040
EN8 (080A42) Bright
| Product | Metric sizes Min | Max | Imperial sizes Min | Max |
|---|---|---|---|---|
 | 5mm dia | 200mm dia | 1/4" dia | 8" dia |
 | 8mm x 7mm Key Steel | 50mm x 28mm Key Steel | 5/16" x 1/4" Key Steel | 2" x 1 1/2" Key Steel |
 | 4mm SQ Key Steel | 50mm SQ Key Steel | 3/16" SQ Key Steel | 2" SQ Key Steel |
 |
EN8 (080A42) Chemical Composition
| C | Si | Mn | S | P | Cr | Ni | Mo | |
|---|---|---|---|---|---|---|---|---|
| Min | 0.4 | 0.1 | 0.7 | |||||
| Max | 0.45 | 0.4 | 0.9 | 0.05 | 0.05 | 0.3 | 0.4 | 0.15 |
EN8 (080A42) Typical applications
- Automotive parts
- Connecting rods
- Studs, bolts
- Axles, spindles
- General engineering components