What is 1.6580 (30CrNiMo8)
The alloyed engineering steel 1.6580 (30CrNiMo8) is characterized by high strength, toughness, and excellent through-hardening properties. These characteristics make it a versatile material suitable for a wide range of applications.
Heat-treated condition (quenched and tempered):
Tensile strength QT 800–950 N/mm² | 1000–1200 N/mm²
1.6580 is popularly known as AISI 4340.
International identifiers
Properties of the material 1.6580 (30CrNiMo8)
Properties
| Weldability | limited |
| Machinability | medium -> 4 (1 = poor - 10 = good) |
| Toughness | good |
| Corrosion resistance | low |
| Wear resistance | good |
- Welding: Very difficult to weld due to its carbon content.
- Hardening may occur in the edge area.
- Therefore, not recommended for welded structures.
- Hot forming: Should be carried out at 850–1,100 °C.
- Followed by slow cooling in the furnace.
Physical properties
| Density in kg/dm3 | 7,76 |
| Electrical resistivity at 20°C in (Ω mm2)/m | 0,19 |
| Modulus of elasticity (103 MPa) | 210 |
| Thermal conductivity at 20°C in W/(m K) | 38,0 |
| Specific heat capacity at 20°C in J/(kg K) | 430 |
Processing
| Gas nitriding | possible |
| Machining | possible |
| Open-die and closed-die forging | possible |
Calculate the weight quickly and easily
Heat treatment 1.6580
- Normalizing: 850–880 °C, followed by air cooling.
- Tempering after normalizing: Subsequent tempering may be required depending on the component dimensions.
- Soft annealing: 650–700 °C, followed by slow cooling in the furnace.
- Quenching and tempering: 830–860 °C, followed by quenching in oil or an equivalent aqueous polymer solution.
- Tempering after hardening: To prevent cracking, temper immediately after hardening at 540–680 °C.
- After tempering: Air cooling.
Chemical composition of 1.6580
| 1.6580 30CrNiMo8 | C | Si | Mn | P | S | Cr | Mo | Ni | V |
|---|---|---|---|---|---|---|---|---|---|
| min. | 0,26 | 0,3 | 1,8 | 0,3 | 1,8 | ||||
| max. | 0,34 | 0,4 | 0,6 | 0,035 | 0,035 | 2,2 | 0,5 | 2,2 |
Areas of application for 1.6580
Areas of application
- Mechanical engineering
- Automotive engineering
- Fracking
- Pump manufacturing
- Mountings for testing machines
- Pole plates for generators
- Steering arms for airport towing tractors
- Coils for press manufacturing
- Suspensions for rolling mill machinery
Instructions for use
- Suitable for components with high toughness requirements.
- Good hardenability allows use even for components with larger cross-sections.
- High strength makes it suitable for highly mechanically stressed components.
- Particularly suitable for highly stressed components in mechanical and automotive engineering.
Form of supply and availability of 1.6580
In stock
Immediately available from stock
Form of supply
Flat, forged, quenched and tempered
Flat, rolled, quenched and tempered
Sawn blank
The processing with the saw is a mechanical processing of the material, which results in a significantly lower unintended deformation and increased hardness for the existing structure, such as the thermal cutting.
Thus, the machined workpiece has a homogeneous structure even at the edge, which does not change in the continuation of the material.
This circumstance allows immediate finishing of the workpiece with milling or drilling . So it is not necessary to anneal the material or make a similar operation beforehand.
![[Translate to Englisch:]](/fileadmin/user_upload/produkt-fotos/1.6580_Stahlzuschnitt.jpg "[Translate to Englisch:]")
![[Translate to Englisch:]](/fileadmin/user_upload/produkt-fotos/1.6580_Stahlblock.jpg "[Translate to Englisch:]")
![[Translate to Englisch:]](/fileadmin/user_upload/produkt-fotos/1.6580_Flachstahl.jpg "[Translate to Englisch:]")
Frequently asked questions about material 1.6580:
It is a highly alloyed chromium-nickel-molybdenum quenched and tempered steel. It has extremely high hardenability, allowing it to achieve a tensile strength of up to 1,250 N/mm² while maintaining excellent toughness, even in components with large cross-sections.
It is the preferred material for so-called fluid ends (pump blocks) and highly stressed crankshafts. Since fracking pumps handle abrasive fluids at extremely high pressures (often exceeding 1,000 bar) in a pulsating flow, the excellent hardenability and toughness of 1.6580 help prevent premature cracking of the pump housing under continuous cyclic loading.
Yes, for components with large cross-sections. 1.6580 (30CrNiMo8) has a significantly higher nickel and chromium content than 1.6582 (34CrNiMo6). As a result, it offers considerably better hardenability and achieves extremely high strength and toughness values even in massive components (over 100 mm in diameter), while the more cost-effective 1.6582 reaches its limits with large cross-sections.
Notice: Specifications contained in following data sheet are provided as a description, liability is excluded!