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Carbon steel grade 070M20

EN3A | 070M20 Engineering steel

EN3A | 070M20 is a general engineering steel, 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 | 070M20 can be case hardened and is normally supplied in the as drawn / as turned condition. EN3A | 070M20 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 EN3A | 070M20 in black round bar.

Associated standards

UK Standard EN3A | European Grades C15, C20, ST52-3, S235 | Werkstoff 1.0402, 1.0401, 1.1151 | SAE/AISI 1020

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Steel stock grades

Order EN3A | 070M20 steel

EN3A Black round

EN3A | 070M20 black steel


Product
Metric
Min size

Max size
codes-round26mm dia800mm dia
codes-flat213mm x 3mm200mm x 20mm
codes-square220mm100mm
codes-hex2

EN3A | 070M20 Chemical Composition

CSiMnSPCrNiMo
Min0.160.10.5
Max0.240.40.90.050.050.30.40.15

EN3A | 070M20 Mechanicals

Yield
N/mm2
0.2% proof
N/mm2
UTS (Rm)
N/mm2
Elong (A)
%
Red of Area (Z)
%
Hardness
HB
Normalised (min)21543021126
Normalised (max)
Drawn (min)42053012179
Drawn (max)

Typical Applications of EN3 steel

  • 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