EN47
EN47
EN47 Grade Steel Strips & Sheets
EN47 chromium vanadium type spring steel we supplied in the as rolled condition. EN47 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.
Related Specifications
BS970 735A50 735A51 1.8159 AISI 6150 50CrV4 50CV4 ASTM A829
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Form of Supply
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Hot Rolled
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Cold Rolled
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Applications
EN47 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, Disc Wiser, Blades. Safety product such as seat belt, automobile fasteners, break components & transmission parts.
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Chemical Composition
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Annealing
Heat slowly to 820-840°C, soak well. Cool slowly in the furnace.
Hardening
Heat slowly to 650-700°C and thoroughly soak. Continue to heat the steel to the final hardening temperature of 830-860°C and allow the component to be heated through. Quench in oil.
Tempering
Temper the EN47 spring steel component immediately after quenching whilst tools are still hand warm. Re-heat to the tempering temperature then soak for one hour per 25 millimetre of total thickness (2 hours minimum) Cool in air. For most applications tempering of this grade will be between 400-600°C.
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.