EN40B (722M24) is ideal for nitriding, which creates a wear-resistant case-hardened finish.

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The engineering steel alloy finds use in many motorsport applications and is particularly suited for producing crankshafts.

Suitability:

EN40B (722M24) is a high-tensile steel benefitting from good toughness and wear resistance. Due to the material's fine-grain microstructure, the alloy offers resistance to impact and shock without breaking or fracture. Our material is highly suitable for highly stressed applications and where components are subject to wear and abrasion. EN40B is weldable, but precautions are required to ensure the material is unaffected and not prone to cracking. Preheating with subsequent post-weld heat treatment is advisable as the carbon content is high.

Crankshaft Production:

Crankshafts in EN40B are typically manufactured from forged EN40B or billets with bored holes to reduce weight before stress-relieving, nitriding and heat treatment, which raises the core strength of the alloy.

Good Toughness:

EN40B has good toughness - it can withstand sudden shocks and impacts, which is helpful in motorsport applications. The alloy's microstructure (fine-grained ferrite and pearlite) results in the toughness characteristics of the material. Hardenability increases due to the inclusion of chromium and molybdenum in the alloy mix, which in turn boosts overall toughness.

Where performance matters:

When you purchase high-performance materials from Smiths High Performance, you will join some of the biggest and best global engineering companies. We are a Tier 1 supply chain partner to the world's leading motorsport companies. Our unique business structure and ethos allow us to offer services otherwise unavailable in this market sector.