Steel Suppliers and stockholders - Steel Express

817M40 Engineering Steel

817M40 also known as EN24/EN24T comes treated as 817M40T to 850/1000 N/mm2 we can offer 817M40T in plate from 10mm thick up to 300mm, diameters from 10mm up to 950mm, squares from 20mm to 300mm and flats 20 x 10 up to 3000 x 300mm from stock. 817M40 is a popular through-hardening steel with good machinability in the "T" condition. 817M40T is used in gears, shafts, studs and bolts. 817M40T can be further surface-hardened to create components with enhanced wear resistance by induction or nitriding processing.

We stock 817M40 and 817M40T for rapid local and national delivery, also available for export, call for details.

For popular 817M40 stock please see our EN24T stock page.

BS 970 1991 BS 970 1955 EN AISI/SAE Werkstoff
817M40 EN24 4340 1.6565

 

EN24T properties, composition and equivalents here.

817M40T is renown for its wear resistance properties and also were high strength properties are required.
Typical chemical composition of 817M40.

C

SI

MN

S

P

Cr

Mo

Ni

0.36/0.44

0.10/0.35

0.45/0.70

0.040 MAX

0.035 MAX

1.00/1.40

0.20/0.35

1.30/1.70

 

A range of popular 817M40 size ranges can be found on the EN24T stock page, other sizes available upon request.

As we cut all our 817M40 flats & squares from plate we can cut other sizes more suitable for you.

817M40 Steel is equivalent to AISI 4340 steel or Werkstoff 1.6565 and EN24T

Click here for Steel hardness conversion charts and heat treatment hardness tables

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Steel Express

Based in Wolverhampton, West Midlands, Steel Express are steel suppliers and stockholders. Stock is delivered on our own fleet of vehicles locally and nationally quickly and efficiently on the day we say we will.

We also provide a free issue cutting service, press braking, fabrication and forging.

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