EN3 (070M20) Engineering steel
EN3A and EN3B are general engineering steels, suitable in applications where heavy stresses and heat treatment are not involved, such as welded and riveted structures, forgings, machined parts and hot pressing. High Peak Steels stock this in a range of sizes and shapes.
It is a bright drawn, or turned, mild steel with good machinability. Ideal for use in a variety of general engineering applications. EN3A and EN3B can be case hardened and is normally supplied in the as drawn / as turned condition. EN3A and EN3B steel will withstand a moderate amount of cold deformation and only offers low strength but good machinability. The material has good weldability characteristics however it has poor hardenability.
Overall a general-purpose mild steel, readily weldable and suitable for case hardening.
Flat sections are of particular suited to tool makers.
For wider applications where case hardening is critical engineers can choose, EN3B with a refined analysis that conforms to EN32 (080A15).
Steel stock range
High Peak Steels stock offer EN3 (070M20) in round bar, flat bar, square bar and hexagon.
Associated standards
UK Standard EN3A | European Grades C15, C20, ST52-3, S235 | Werkstoff 1.0402, 1.0401, 1.1151 | SAE/AISI 1020
EN3A (070M20) Black
Product | Metric Min size | Max size |
|---|---|---|
 | 6mm dia | 800mm dia |
 | 13mm x 3mm | 200mm x 20mm |
 | 20mm | 100mm |
 |
EN3B (070M20) Bright
Product | Metric Min | Max | Imperial Min | Max |
|
|---|---|---|---|---|---|
| 6mm dia | 200mm dia | 3/16" dia | 8" dia | |
| 13mm x 3mm | 300mm x 25mm | 1/4" x 1/8" | 12" x 2" | |
| 20mm | 100mm | 3/16" | 6" | |
| 7mm A/F | 65mm A/F | .312" A/F | 2.76" A/F |
EN3 (070M20) Chemical Composition
| C | Si | Mn | S | P | Cr | Ni | Mo | |
|---|---|---|---|---|---|---|---|---|
| Min | 0.16 | 0.1 | 0.5 | |||||
| Max | 0.24 | 0.4 | 0.9 | 0.05 | 0.05 | 0.3 | 0.4 | 0.15 |
EN3 (070M20) Mechanicals
| Yield N/mm2 | 0.2% proof N/mm2 | UTS (Rm) N/mm2 | Elong (A) % | Red of Area (Z) % | Hardness HB |
|
|---|---|---|---|---|---|---|
| Normalised (min) | 215 | 430 | 21 | 126 | ||
| Normalised (max) | ||||||
| Drawn (min) | 420 | 530 | 12 | 179 | ||
| Drawn (max) |
EN3 (070M20) Typical applications
- HAULAGE GEAR
- COMMUTATOR SCREWS
- WAGON BUFFERS
- VALVE GATE AND BODY FORGINGS
- MOTOR CAR WHEEL HUBS
- SHAFTS
- STAYBOLTS
- BRAKE
- PEDAL LEVERS
- CAGE SUSPENSIONS
- GEAR SELECTORS
- VARIOUS MOTORCYCLE LEG STAMPINGS
- CLUTCH & BRAKE HOUSING