EN24T Alloy Steel

EN24T flat bar and round bar steel stockholders and suppliers. EN24T is a nickel chromium molybdenum specification available as full bar lengths or cut pieces in flat and round bar with delivery to the whole of the UK. It is usually supplied hardened and tempered as EN24T or EN24U. It is readily machineable and combines a good high tensile steel strength with shock resistance, ductility and wear resistance. It is a widely used engineering steel with a tensile strength of 850/1000 N/mm². It has reasonably good impact properties at low temperatures, whilst it is also suitable for a variety of elevated temperature applications. Flame or induction hardening of EN24T can give a case hardness of 50 HRc or higher.

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

Alternative grades we supply

EN16T | EN19T | EN26W | EN30B | EN31 | EN32 | EN36 | EN40B | EN41B |

Form of Supply

West Yorkshire Steel are stockholders and suppliers of EN24T flat, round and plate – squares, flats and diameters can be sawn cut to your required sizes. Diameters in EN24T are available bright drawn and black hot rolled. EN24T can be sawn to your required lengths as one offs or multiple cut pieces.

Ground steel bar can be supplied, providing a high tensile engineering steel precision ground bar to tight tolerances.

Click here to contact our experienced sales team who will assist you with your EN24 alloy steel enquiry.

  • Plate
  • Flat
  • Diameter

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EN24 was originally introduced for use in the motor vehicle and machine tool industries for gears, pinions, shafts, spindles and the like. Later its applications became much more extended. Suitable to produce parts for such as locomotives, cranes, rolling mills, coal cutting machinery etc. where good strength and fatigue resistance is called for. Other applications for EN24 and EN24T are found in die casting and hot metal working, such as die bolsters, racks and pinions, angle pins for pressure die casting, hot stamping dies for aluminium stamping, die beds for steel stamping, lower temperature nut, bolt and rivet heading dies, large section drop forging dies. It is widely used in the plastic and rubber moulding industries for moulds (particularly rubber moulds), hob retaining rings, patens, retaining rings for built up moulds, stop pins for moulds. For moulds EN24 is normally supplies hardened and tempered to ‘T’ condition. If a higher hardness is desired EN24T should be annealed and then heat treated to the required hardness.

Carbon 0.35-0.45% Silicon 0.10-0.35%
Nickel 1.30-1.80% Manganese 0.45-0.70%
Chromium 0.90-1.40% Phosphorous 0.05% max
Molybdenum 0.20-0.35% Sulphur 0.05% max

EN24T flat bar is available cut from large rectangular block, pieces can be cold sawn to your specific sizes.

Preheat carefully, then raise temperature to 1000-1100°C for forging. Do not forge the steel below 850-1100°C. After forging cool slowly preferably in a furnace.

Heat slowly to 840-860°C, soak well and allow to cool with the furnace to 580°C, before withdrawing.

When parts are heavily machined, ground or otherwise subject to cold work, stress relieving will be beneficial prior to hardening. Heat carefully to 650-670°C, soak well before cooling in the furnace or in the air.

EN24T is supplied  ready heat treated. If further heat treatment is required annealed EN24 should be heated slowly to 830-850°C and after adequate soaking at this temperature quench in oil. Temper as soon as tools reach room temperature. Hardening from a neutral salt bath, will reduce the possibility of scaling or decarburisation. Heat to 830-850°C and after equalisation quench in oil.

Heat carefully to a suitable temperature selected by reference to the tempering chart or table, soak at the temperature for 2 hours per 25mm of ruling section, then all to cool in the air. Tempering between 250-375°C is not advised as tempering within this range will seriously reduce the impact value. The tempering temperature is dependent on the required mechanical properties, the steel can achieve EN24U, EN24V, EN24W, EN24Y & EN24Z.

Condition Tensile
T 850-1000 650 13 35 248-302
U 925-1075 755 12 42 269-331
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 alloy steel.

EN24T alloy steel is available with a cast and analysis certificate or BS EN 10204 3.1 mill certificate, please request when placing any orders.

EN24T is supplied in accordance with our ISO 9001:2015 registration.