Grade EN9

EN9 steel is a high-carbon, medium-tensile engineering steel widely recognized for its excellent strength, wear resistance, and toughness. With a higher carbon content than EN8, EN9 provides significantly improved hardness and durability, making it an ideal choice for heavy-duty mechanical components subjected to stress, shock, and continuous loading. Its robust performance makes it a popular material across automotive, industrial, and general engineering sectors.

Typically supplied in the normalized condition, EN9 offers reliable mechanical properties that can be further enhanced through heat treatment. It responds exceptionally well to hardening and tempering, achieving hardness levels of 50–55 HRC, and even higher surface hardness (up to 55–60 HRC) through induction or flame hardening. This combination of a hard surface and tough core makes it suitable for wear-resistant applications.

Tool Steel

EN9 also offers good machinability in its normalized or annealed state, allowing efficient manufacturing processes such as turning, milling, and drilling. However, due to its higher carbon content, machining becomes more difficult after hardening. Welding is possible but requires careful control, including preheating and post-weld heat treatment, to avoid cracking.

Due to its strength, wear resistance, and cost-effectiveness, EN9 steel is widely used for gears, shafts, tools, and various machine components that operate under demanding conditions. It is a dependable choice for industries requiring durability and long service life.

Key Properties

  • High Strength & Toughness: Offers higher tensile strength than EN8, suitable for heavy-duty applications under stress and shock.
  • Excellent Wear Resistance: Ideal for components exposed to friction and abrasive conditions such as gears and rollers.
  • Heat Treatable to High Hardness: Can achieve 50–55 HRC through hardening and tempering, and up to 60 HRC with surface hardening.
  • Good Machinability (Before Hardening): Easily machinable in normalized condition; machining becomes difficult after hardening.
  • Moderate Weldability: Requires preheating and post-weld treatment due to higher carbon content.
  • Cost-Effective: Provides high performance without the cost of alloy steels.

Common Applications

  • Gears, sprockets, pinions, and gear shafts
  • Heavy-duty axles and crankshafts
  • Hammers, chisels, and hand tools
  • Camshafts and connecting rods
  • Railway components
  • Industrial machine tools
  • Rollers, rams, and levers
  • Shear blades and cutting tools
  • Wear-resistant machinery parts

PUROHIT STEEL is a trusted name in the tool steel industry, with humble beginnings dating back to 1965 and over three decades of expertise in delivering high-quality materials and solutions. Today, the group operates multiple well-established units, maintaining a vast inventory ranging from hot work and cold work tool steels to specialized materials. Known for reliability and strong technical support, PUROHIT STEEL caters to the diverse requirements of small, medium, and large-scale industries. The company specializes in manufacturing moulds and tooling components using premium grades such as Grade EN9 which is ideal for applications including injection moulds (medium to large size), blow moulds, low-pressure die-casting dies, automotive moulds, tooling plates, extrusion dies, machine parts, shafts, and general tooling components. With a focus on quality, performance, and precision, PUROHIT STEEL continues to deliver durable and efficient tooling solutions.