Grade EN24

EN24 steel is a premium-grade nickel–chromium–molybdenum alloy steel known for its exceptional strength, toughness, and fatigue resistance. It is widely used in critical engineering applications where components are subjected to heavy loads, shock, torsional stress, and cyclic fatigue. Compared to EN19, EN24 offers higher strength and improved toughness, making it suitable for more demanding environments.

Typically supplied in the quenched and tempered (Q&T) condition, EN24 achieves very high mechanical properties, including tensile strength ranging from 850 to 1200 MPa. Its ability to maintain strength and toughness even in larger cross-sections makes it ideal for heavy-duty shafts, gears, and industrial machinery components.

Tool Steel

One of the key advantages of EN24 is its excellent hardenability, allowing it to be induction hardened for surface hardness up to 55–60 HRC while maintaining a tough core. The presence of nickel, chromium, and molybdenum enhances wear resistance, fatigue strength, and impact toughness, ensuring long service life in demanding conditions.

Due to its superior mechanical performance, EN24 is widely used across industries such as automotive, aerospace, defense, mining, and oil & gas. It is the preferred material for high-load components where reliability, durability, and strength are critical.

Key Properties

  • Very High Tensile Strength: Achieves 850–1200 MPa in Q&T condition with hardness of 30–40 HRC.
  • Outstanding Toughness & Fatigue Resistance: Ideal for components under impact loads, torsion, vibration, and cyclic stress.
  • Excellent Hardenability: Maintains strength even in large cross-sections, suitable for heavy-duty parts.
  • Good Wear Resistance: Enhanced by nickel, chromium, and molybdenum content.
  • Moderate Machinability: Machinable in annealed or tempered condition.
  • Weldability (With Precautions): Requires preheating (250–350°C) and post-weld heat treatment.

Common Applications

  • Heavy-duty shafts, propeller shafts, and transmission shafts
  • Gears, pinions, spur gears, and bevel gears
  • High-strength studs, bolts, and tie rods
  • Crankshafts, camshafts, and connecting rods
  • Couplings, spindles, and axles
  • Tool holders, collets, and chuck components
  • Heavy forging components
  • Aircraft landing gear parts
  • Press rams and high-load machine parts
  • Mining drill rods and downhole tools

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 Steel 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 EN24 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.