EN24T Steel – Properties, Composition, Equivalent Grades, Heat Treatment & Applications 
 

If you are sourcing high-strength steel for heavy-duty engineering applications, EN24T steel is a material you must understand thoroughly. Also known as 817M40, EN24T is a popular high-tensile alloy steel known for its excellent combination of strength, shock resistance, and ductility. 

What is EN24T? 

EN24T is a nickel-chromium-molybdenum alloy steel. It is supplied in the "T" condition, which means it has been hardened and tempered to a specific tensile strength range of 850–1000 N/mm². This specific heat treatment process gives the material its high fatigue strength and resistance to wear, making it ideal for components subject to high stress. 

EN24 vs EN24T: Understanding the Difference 

You might often see inquiries for "EN24" and "EN24T" used interchangeably, but the distinction is critical for procurement: 

• EN24: Refers to the base material grade (composition only) usually supplied in an annealed condition, which is softer and easier to machine but lacks high tensile strength. 
• EN24T: Refers specifically to the material in the hardened and tempered "T" condition. This is the finished, high-strength state ready for heavy-duty applications. 

At Nifty Alloys LLC, we ensure that when you order EN24T, you receive material that meets the precise mechanical properties required for your specific engineering needs.