What is 1.7225 (42CrMo4)
42CrMo4 | 1.7225 is a versatile heat-treated steel, which is characterized by its high strength and toughness. It is mainly used in mechanical engineering, and for vehicle and automotive use. Gear, crankshafts and connecting rods are manufactured from it. When a higher nickel content, enhanced wear resistance, and greater load-bearing capacity are required, material grade 1.6580 (30CrNiMo8) represents a high-performance alternative.
International identifiers
Properties of the material 1.7225 (42CrMo4)
Properties
| Weldability | difficult to weld |
| Machinability | 5 (1=poor - 10=good) |
42CrMo4 | 1.7225 is very difficult to weld and is therefore not suitable for welded structures. If welding is unavoidable, a heat treatment is recommend.
Physical properties
| Density in kg/dm3 | 7,72 |
| 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) | 42,6 |
| Specific heat capacity at 20°C in J/(kg K) | 470 |
Calculate the weight quickly and easily
Heat treatment 1.7225
Chemical composition of 1.7225
| 42CrMo4 1.7225 | C | Si | Mn | P | S | Cr | Mo | Ni | V |
|---|---|---|---|---|---|---|---|---|---|
| min. | 0,38 | 0,6 | 0,9 | 0,15 | |||||
| max. | 0,45 | 0,4 | 0,9 | 0,025 | 0,035 | 1,2 | 0,3 |
Areas of application for 1.7225
Instructions for use
- When high strength and toughness are required.
- For components that must withstand high mechanical loads.
- When good wear resistance is required.
- When higher wear resistance and load-bearing capacity are required, material 1.6580 (30CrNiMo8) offers a high-performance alternative.
Areas of application
- Mechanical engineering
- Vehicle and automotive engineering
- Gears
- Transmission shafts
- Crankshafts
- Connecting rods
Form of supply and availability of 1.7225
In stock
Immediately available from stock
Form of supply
plates, rolled, quenched and tempered
round bars, rolled / forged, quenched and tempered
flat, forged, 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/1.7225_Flachstahl.jpg "[Translate to Englisch:]")
![[Translate to Englisch:]](/fileadmin/user_upload/produkt-fotos/1.7225_Blech.jpg "[Translate to Englisch:]")
![[Translate to Englisch:]](/fileadmin/user_upload/produkt-fotos/1.7225_Rundstahl.jpg "[Translate to Englisch:]")
Frequently asked questions about material 1.7225:
USA (AISI/SAE): 4140 (similar, but not identical). Japan (JIS): SCM440.
+QT stands for quenched and tempered. In this condition, the steel has its optimum strength and toughness properties.
Due to its higher carbon content and the risk of hardening in the microstructure, its weldability is poor to very difficult. Welding applications without special precautions, such as preheating and post-weld heat treatment, are unsuitable.
1.7225 is not a stainless steel. It has only moderate to good corrosion resistance and must be protected with coatings, such as galvanizing or painting, when used in humid environments.
Notice: Specifications contained in following data sheet are provided as a description, liability is excluded!