EN47

EN47 Alloy Steel Product Overview

EN47, also known as 50CrV4 or DIN 1.8159 (equivalent to AISI 6150), is a high-carbon, chromium-vanadium spring steel under the BS 970 standard. Renowned for its high tensile strength, excellent toughness, and superior wear and abrasion resistance, EN47 is designed for applications requiring resilience under stress, shock, and vibration. Typically supplied in the as-rolled or annealed condition (max 255 HB), it achieves a hardness of 50–60 HRC after oil hardening and tempering. The addition of chromium and vanadium enhances fatigue strength and shock resistance, making it ideal for high-performance spring and engineering components.

Applications

EN47 is widely used in industries requiring high-strength, durable components subjected to dynamic loads:

Automotive and Transportation:

• Leaf and coil springs for vehicles, including trucks and tractors.
• Suspension components, such as torsion bars and stabiliser bars.
• Crankshafts, steering knuckles, and connecting rods.

Industrial Applications:

• Heavy-duty springs for industrial machinery and presses.
• High-load gears, spindles, and pumps.
• Tooling components like punches and dies.

Other Uses:

• Agricultural equipment springs and components.
• Shock-absorbing parts in mining and construction machinery.
• High-strength fasteners and structural components in general engineering.

Chemical Composition

The chemical composition of EN47 ensures its high strength, toughness, and wear resistance:

• Chromium (Cr): Enhances hardenability, wear resistance, and corrosion resistance.
• Vanadium (V): Improves fatigue strength and refines grain structure.
• Manganese (Mn): Contributes to strength and toughness.
• Carbon (C): Provides high hardness and tensile strength.

Supply Size

EN47 is available in various forms and sizes to meet industrial requirements:

• Round Bars:
  Diameter 16 mm to 700 mm.
• Flat Bars:
  Minimum: 10 mm thickness x 80 mm width.
  Maximum: 500 mm thickness x 2000 mm width.