722M24 Steel (EN40B)

722M24 is a low-alloy steel that contains chromium and molybdenum as its primary alloying elements.

It is a high-tensile steel with good strength, toughness, and wear resistance properties. This type of steel is commonly used in applications that require high strength and good resistance to wear and fatigue. It is often used to manufacture aerospace, oil and gas, and automotive components.

  • Good toughness
  • Good tensile strength
  • Good wear and fatigue resistance
  • Highly weldable

When considering welding 722M24, precautions must be taken to ensure that the welding process does not affect the material properties or cause cracking. Due to its high carbon content, preheating the material is recommended before welding to avoid cracking. Post-weld heat treatment is also necessary to relieve residual stresses and improve the toughness of the weld. 722M24 steel is a weldable material, which makes it easy to manufacture components with complex shapes.

Chemical Composition (weight, %)
* Properties as per BS 970
C Si Mn P S Cr Mo
Min. 0.20 0.10 0.45 3.00 0.45
Max. 0.28 0.40 0.70 0.035 0.040 3.50 0.65
722M24 (EN40B) alloy steel
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722M24 PDF

This steel has good toughness, which means it can withstand impacts and sudden shocks without fracturing or breaking. The toughness of this steel is primarily due to its microstructure, which consists of fine-grained ferrite and pearlite. The presence of chromium and molybdenum in 722M24 steel also contributes to its toughness by improving its hardenability and resistance to wear and corrosion.

The material can be heat treated to improve its mechanical properties, strength, and toughness, making it an ideal material for high-stress applications. Heat treatment typically involves three stages: annealing, normalising, and hardening and tempering.

Applications include mining- rock drills and crushers, turbines, generators, gears, shafts and drilling equipment.

We stock 722M24 in round and square bars.

We stock a comprehensive range of steels for engineering

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