826M40 Alloy Steel


826M40 826M40W steel suppliers and stockholders delivering to the whole of the UK. West Yorkshire Steel are suppliers of BS970 826M40 in round bar hot rolled and heat treated to ‘W’ condition. As a 2.5% nickel chromium molybdenum high tensile grade it has a tensile range of 1075-1225 N/mm². It is suitable for applications which require higher tensile and yield strength than 817M40 or 826M31 specifications. 826M40 can be induction or flame hardened and is also suitable for nitriding.

We welcome export enquiries for alloy steel. Contact our sales office and consult our shipping policy for further details.

Alternative grades we supply

605M36T | 709M40T  | 708M40T | 817M40T | 835M30 | 535A99 | 655M13 | 722M24 | 905M39

Form of Supply

West Yorkshire Steel are stockholders and suppliers of round bar. Diameters in 826M40W can be sawn to your required length as one offs or multiple cut pieces. 826M40W can sometimes conform to 826M40V, please contact our sales department for further information if you require this grade in ‘V’ condition. Centreless ground 826M40W steel bar can be supplied, providing a high tensile engineering steel precision ground bar to tight tolerances.

Contact our experienced sales team who will assist you with your alloy steel enquiry.

  • Diameter

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Applications

A commonly used engineering steel 826M40W is suitable for applications that require a higher tensile than 817M40T. Typical applications include pins, rams, turbine discs, torsion bars, gears, shafts and spindles.


Carbon 0.36-0.44% Nickel 2.30-2.80%
Manganese 0.45-0.70% Chromium 0.50-0.80%
Silicon 0.10-0.35% Molybdenum 0.45-0.65%
Phosphorous 0.035% max
Sulphur 0.040% max

To forge pre heat the 826M40 carefully, then raise the temperature to 1150-1200°C and hold at temperature until thoroughly soaked and suitable to forge. Do not forge below 850°C. After forging the 826M40 should be cooled slowly.


Heat the steel slowly to 790-840°C. Hold until the temperature is uniform throughout the steel. Cool in a furnace.


826M40W is supplied ready heat treated. If further heat treatment is required annealed 826M40 should be heated to 820-850°C and hold until the temperature is uniform through the section. Quench the 826M40 steel in oil, water or polymer as required.


826M40 can be flame or induction hardened to achieve a good surface hardness.


Heat the 826M40 component to the required tempering temperature between 450°/660°C and thoroughly soak for two hours per 25mm thickness of section, cool in still air.


Condition Tensile
N/mm²
Yield
N/mm²
Elongation
%
Izod
KCV J
Hardness
Brinell
V 1000-1150 850 12 42 293-352
W 1075-1225 940 11 35 311-375
X 1150-1300 1020 10 28 341-401
Y 1225-1375 1095 10 21 363-429
Z 1550 1235 5 9 444

(*subject to ruling section)


Heat treatment temperatures, including rate of heating, cooling and soaking times will vary due to factors such as the shape and size of each steel component. Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities. Please consult your heat treatment provider for full guidance on heat treatment of 826M40 alloy steel.


826M40W alloy steel is available with a cast and analysis certificate or a BS EN 10204 3.1 mill certificate, please request when placing any orders.


826M40W is supplied in accordance with our ISO 9001:2015 registration.