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Model No: EN24
1.6582 / 34CrNiMo6 / 817M40T EN24 Alloy Steel
EN24 is a 1.5% nickel, 1% chromium, 0.2% molybdenum alloy steel. EN24 can be heat treated to a wide range of tensile strengths from 850-1000 N/mm² (‘T’ condition) up to 1550 N/mm² (‘Z’ condition).
Delivery :
FOB
minimum order :
100 kilograms
Supply Ability :
5000Tonkilograms / Month
Stock Time :
7-10Day
Country of Origin :
CHINA
Quantity :
EN24 is a 1.5% nickel, 1% chromium, 0.2% molybdenum alloy steel. EN24 can be heat treated to a wide range of tensile strengths from 850-1000 N/mm² (‘T’ condition) up to 1550 N/mm² (‘Z’ condition).
Heat treated EN24 offers high tensile strength combined with good ductility and resistance to shock. At low temperatures good impact values can be obtained.
Equivalent grades of steel 34CrNiMo6 (1.6582)
| EU EN | USA - | Germany DIN,WNr | Japan JIS | France AFNOR | England BS | Italy UNI | China GB | Sweden SS | Poland PN | Czechia CSN | Russia GOST | Inter ISO |
| 34CrNiMo6 | 4340 | 34CrNiMo6GS-34CrNiMo6V | SNCM447 | 35NCD6 | 817M40 | 35CrNiMo635NiCrMo6KB | 34CrNi3Mo34CrNiMoZG34CrNiMo | 2541 | 34HNM | 163421634316444 | 36KH2N2MFA38KH2N2MA40KHN2MA | 36CrNiMo6 |
Chemical Composition
| Grade | C | Mn | P | S | Si | Ni | Cr | Mo |
| EN24/817M40 | 0.36-0.44 | 0.45-0.70 | 0.035 | 0.040 | 0.1-0.40 | 1.3-1.7 | 1.00-1.40 | 0.20-0.35 |
| 4340 | 0.38-0.43 | 0.60-0.80 | ≦0.035 | ≦0.04 | 0.15-0.35 | 1.65-2.00 | 0.70-0.90 | 0.20-0.30 |
| 34CrNiMo6/1.6582 | 0.30-0.38 | 0.50-0.80 | ≦0.035 | ≦0.035 | ≦0.40 | 1.3-1.7 | 1.3-1.7 | 0.15-0.30 |
Mechanical Properties
| Condition | Tensile N/mm² | Yield N/mm² | Elongation % | Izod KCV J | Hardness Brinell |
| T | 850-1000 | 650 | 13 | 35 | 248-302 |
| U | 925-1000 | 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 |
EN24 Heat Treatment
EN24 can be heat treated using various processes. Conventional hardening and tempering required the steel to be slowly and thoroughly heated to 830-850°C followed by immediate quenching in oil. Tempering is done as soon as the steel reaches room temperature. If hardening from T condition is required it is recommended to fully anneal prior to heat treatment. Standard annealing of EN24T can be carried out by heating slowly and uniformly to 840-860°C, cool in the furnace to 580°C then allow to cool to room temperature.
Heating, cooling and soaking times can vary due to factors such as the size and the shape of the component. Heat treatment providers can offer a full range of heat treatment processes including the following:
- Hardening & Tempering
- Plasma Nitriding
- Nitriding
- Case Hardening
- Carburising
- Nitrocarburising
- Induction Hardening
- Flame Hardening
- Stress Relieving
- Annealing
Applications
When first becoming more prevalent back in the early 1900s EN24 was classified as a wrought steel for automobiles and aircrafts and as such was used to produce numerous parts and components for these industries. It is most popular as EN24T and with good high tensile properties in T condition it is used widely in the manufacturing sector. Some examples of applications include:
- Power transmission gears and other gears requiring maximum hardness.
- Cranks, axles, propellor and gearbox shafts requiring good high tensile properties.
- Connecting rods, special cranks and other parts required to be stiff and yet retain a high degree of toughness.
- Bolts, screwed parts, stub axles, swivel arms required very tough.
- Plastics and rubber moulding industry parts for moulds, hob retaining rings, stop pins.
- Structural components with good high tensile needs.
