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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.

We have increase our range of spring steel bar to add EN47 Spring Steel Round Bar. It is also called as in various standards as 51CrV4 or 50CrV4 or DIN 1.8159 AISI 6150 spring steel in other countries. It is mainly used for tractors, heavy vehicles, stress and the diameter of the larger plate spring, industrial production load and helical spring. It is also used widely in many general engineering applications. When EN47 bar hardened it gives excellent shock resistance and toughness which make it a perfect alloy spring for parts exposed to shock, stress 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

Addition to other grades:

MS, EN1a, EN3b, EN8, EN8d, EN9, EN19, EN24, EN31, EN32b, EN36c, EN41b, EN43b, EN353, IS2062, 42Crmo4, HCHCR, D2, D3, H-11, H-13, CW-1, OHNS, M2, M35, M42, 2714, SKD-11, P20, P20+s, P20+Ni, SCM 420, ASTM Sa-36, ASTM SA-105, SAE 1018, SAE 1020, SAE 4140, SAE 8620, 16MNCR5, 20MNCR5, C20, C35, C40, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75, SAE52100, S40C, S355J2G3.

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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

Mechanical Properties:

Hardening 840-870
Quenching oil
Tempering 150-200


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.


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.


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 millimeter of total thickness (2 hours minimum) Cool in air. For most applications tempering of this grade will be between 400-600°C.

Physical Properties

DENSITY (G/CM 3) 8.08
DENSITY (LB/IN 3) 0.292

Thermal Properties

Forging Properties:

Preheat the steel carefully, then raise temperature to 1050°C for forging. Do not forge below 840°C. After forging EN47 spring steel cool slowly, preferably in a furnace.

Stress Relieving:



Heat slowly to 820-840°C, soak well. Cool slowly in the furnace.


Quantity Value Unit
Density 7700 kg/m3



We recommend you to contact your welding consumables supplier who should provide you full assistance and information on welding EN47 chrome vanadium spring steel.

Supply Cities:

Ahmedabad, Amaravathi, Ambattur, Bangalore, Belgaum, Chennai, Chittoor, Coimbatore, Dindigul, Mysore, Nellore, Hyderabad, Kochi, Mangalore, Tirupur, Tuticorin, Madurai, Andhra Pradesh, Karnataka, Puducherry, Kerala, Tamil Nadu, Telangana, Salem, Thanjavur, Tirchy, Erode, Vellore, Ranipet, Sivakasi, Karur, Hosur, Nagercoil, Kanchepuram, Karaikudi, Neyveli, Cuddalore, Kumbakonam, Thiruvannamalai, Pollachi, Rajapalayam, Gudiyatham, Pudukottai, Vaniyambadi, Ambur, Nagapattinam, Trivandrum, Vijayawada, Guntur, Thirupathi, Nazarathpet, Kakinada, Kurnool, Kadapa, Nizamabad, Mahabubnagar, Karimnagar.