EN 47

Grade Introduction:

En47 Spring Steel supplied in rolled condition. En47 Spring steel is suitable for oil hardening and tempering. When used in the oil hardened and tempered condition En47 spring steel combines spring characteristics with good wear and abrasion resistance. When hardened EN47 offers excellent toughness and shock resistance which make it a suitable alloy spring steel for parts exposed to stress, shock and vibration.

Grade Application:

EN47 spring steel is used widely in the motor vehicle industry and many general engineering applications. Suitable for applications that require high tensile strength and toughness. Typical applications include crankshafts, steering knuckles, gears, spindles and pumps.

Equivalent grades:

BS970 735A50 735A51 1.8159 AISI 6150 50CrV4 50CV4 ASTM A829

Chemical composition:

The following table shows the chemical composition of EN47 steel:

Element C Mn Si P Cr S V Ni
Content (%) 0.45-0.55 0.50-0.80 0.50 0.06 0.80-1.20 0.06 0.15 -


Brinell Rockwell Hardness-150-200

Heat treatment:

Heat treatment 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 EN47.