Chemical Composition

Element Min% Max%
Carbon, C 0.75 0.90
Manganese, Mn 0.60 0.90
Molybdenum, Mo -.- 0.35
Nickel, Ni -.- -.-
Chromium,Cr -.- -.-
Sulfur, S -.- 0.5
Phosphorous, P -.- 0.5

Mechanical Properties

Elastic Modulus (GPa) 190-210
Tensile Strength (Mpa) 615.4
Yield Strength (Mpa) 375.8
Elongation (%) 24.7
Reduction in Area (%) 45
430 MPa (Min) 215 MPA (Min)
Hardness (HB) 174
Impact Strength (J) 6.1

EN42J is suitable for a wide variety of spring applications including flat springs, clutches, knives, doctor blades, saw blades, agricultural tools, wood cutting saws, shims, knives, blades, shims, washers, masonry tools.

Heat Treatment

When heat treating EN42 temperatures, including rate of heating, cooling and soaking times etc. will vary due to factors such as the shape and size of each component. Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities. Please consult your heat treatment provider for full guidance on heat treatment of spring steels.


We recommend you contact your welding consumables supplier who should provide you full assistance and information on welding EN42J steel.