EN24 Overview
EN24 is a high strength steel alloy that is also known as 4340. It is supplied, tempered, and hardened. It is popular and widely used due to its excellent strength in numerous components, including bolts, gears, and studs. Other grades can be surfaced-hardened to create parts with improved water resistance through nitriding or induction.
EN24 Equivalent Materials
Replacement equipment materials for EN24 4340 USA/ASTM, 34Cr2Ni2Mo China GB/T, and SNCM439 Vietnam/Japan JIS.
Characteristics of EN24
EN24 is generally supplied in a final heat-treated condition. It is a popular grade of through-hardening alloy steel, which is also machinable in the “T” condition. EN24 is best-suited for use in heavy-duty commercial shafts, axles, and other components. The steel alloy can maintain good impact value at even lower temperatures, so it is frequently used for offshore applications.
The strength of EN24 is excellent. It is a combination of nickel-chromium-molybdenum and offers incredible tensile strength with excellent ductility and resistance to water. It performs well for use at higher temperatures as well. EN24 is a suitable material that treats quickly and is supplied already tempered.
As a standard high-speed steel grade, EN24 is a well-balanced alloy composition. It forms the basis of durability, edge retention, and rendering. It is perfect for a wide variety of applications that require flexibility.
Uses of EN24
There are several uses for EN24 steel, including stamping dies, rubber molds, cranes, die casting, automotive industries, machine tool industries, shafts, gears, spindles, pinions, rolling mills, coal cutters, nuts, rivets, bolts, plastics, mold support, racks, needle angle die casting, and more. EN24 is an excellent choice for use in heavy-duty projects and processes.
EN24 also works well for woodworking tools, twist drills, broaches, milling cutters, reamers, saw segments, and shaping tools. It is also tough enough to make tools using the cold-forming method, including dies and rams.
EN24 Physical Properties
Physical Properties | Metric | US/Imperial |
Density | 7.80 g/cc | 0.282 lb/in³ |
EN24 Electrical Properties
Electrical Properties | Metric | US/Imperial |
Electrical Resistivity | 0.00000200 – 0.00000250 ohm-cm | 0.00000200 – 0.00000250 ohm-cm |
EN24 Thermal Properties
Thermal Properties | Metric | US/Imperial |
CTE, linear | 12.0 µm/m-°C | – |
@Temperature 20.0 – 300 °C | 6.67 µin/in-°F | – |
@Temperature 68.0 – 572 °F | – | |
Specific Heat Capacity | 0.460 – 0.480 J/g-°C | – |
@Temperature 50.0 – 100 °C | 0.110 – 0.115 BTU/lb-°F | – |
@Temperature 122 – 212 °F | – | |
Thermal Conductivity | 40.0 – 45.0 W/m-K | 278 – 312 BTU-in/hr-ft²-°F |
Transformation Temperature | 315 °C | 599 °F |
725 °C | 1340 °F | |
785 °C | 1450 °F |
EN24 Component Elements Properties
Component Elements Properties | Metric | US/Imperial |
Carbon, C | 0.32 – 0.39 % | 0.32 – 0.39 % |
Chromium, Cr | 1.3 – 1.7 % | 1.3 – 1.7 % |
Iron, Fe | 94.64 – 96.33 % | 94.64 – 96.33 % |
Manganese, Mn | 0.50 – 0.80 % | 0.50 – 0.80 % |
Molybdenum, Mo | 0.15 – 0.30 % | 0.15 – 0.30 % |
Nickel, Ni | 1.3 – 1.7 % | 1.3 – 1.7 % |
Phosphorus, P | <= 0.035 % | <= 0.035 % |
Silicon, Si | 0.10 – 0.40 % | 0.10 – 0.40 % |
Sulfur, S | <= 0.035 % | <= 0.035 % |
*Redstone Manufacturing does not guarantee the accuracy of the information contained within the above table. Some metrics have been rounded, converted, or estimated. Consult a qualified engineer to confirm the accuracy of the information contained on this webpage.