EN36

EN36 Alloy Steel Product Overview

EN36, also known as 655M13 or AISI 3310, is a nickel-chromium case-hardening alloy steel under the BS970 standard. Renowned for its high surface hardness, excellent core strength, and remarkable toughness, EN36 is designed for deep carburising to develop a hard, wear-resistant surface while maintaining a strong, ductile core. The nickel and chromium content enhances hardenability, fatigue resistance, and toughness, making it ideal for heavily stressed components. Typically supplied in the annealed condition (max 229 HB), it is well-suited for applications requiring high wear resistance and durability under dynamic loads.

Applications

EN36 is widely used in industries requiring high-strength, wear-resistant components, particularly in automotive, aerospace, and mechanical engineering:

Automotive and Aerospace:

• Crankshafts, camshafts, and connecting rods with case-hardened ends.
• High-strength gears, pinions, and differential components.
• Gudgeon pins and highly stressed axles.

Mechanical Engineering:

• Roller and ball bearings of extra-light sections.
• Shafts, screws, and rollers requiring high wear resistance.
• Collets, cams, and other precision machine parts.

Other Uses:

• Shipbuilding and railway industry components.
• Oil industry applications, such as high-pressure shafts and fittings.
• Heavy-duty, highly stressed components like spline shafts and drive shafts.

Chemical Composition

The chemical composition of EN36 ensures its high strength, toughness, and carburising properties:

• Nickel (Ni): Enhances toughness, core strength, and hardenability.
• Chromium (Cr): Improves wear resistance, hardness, and corrosion resistance.
• Molybdenum (Mo): Increases strength and resistance to tempering.
• Carbon (C): Low carbon content ensures a ductile core while allowing a hard surface after carburising.

Supply Size

EN36 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.