What is 1.7218 (25CrMo4)
The material 1.7218 is a chrome-molybdenum alloyed tempering steel with good welding properties. Due to its chemical composition, it is suitable for tempering and due to the very good toughness has good tensile strengths, which is why it is used primarily for components in which these characteristics are very important.
The 1.7218 it is also known under the classification AISI 4130.
International identifiers
Properties of the material 1.7218 (25CrMo4)
Properties
| Weldability | good |
| Machinability | medium 5 (1 = poor - 10 = good) |
| Corrosion resistance | low |
1. Quenched and tempered
2. Soft annealed
Physical properties
| Density in kg/dm3 | 7,75 |
| Young's modulus (103 MPa) | 210 |
| Electr. Resistance at 20°C (Ω mm2 /m) | 0,19 |
| Thermal conductivity at 20°C in W/(m K) | 49 |
| Specific heat capacity at 20°C in J/(kg K) | 435 |
Processing
| Cold forming | is possible |
| Machining processing | is possible |
| Free-form and drop forging | is possible |
Calculate the weight quickly and easily
Heat treatment 1.7218
Hot forming
Temperature range: 1100–850 °C
Subsequent slow cooling
Normalizing
Temperature: 860–900 °C
Subsequent air cooling
Soft annealing
Temperature: 680–720 °C
Subsequent slow cooling
Hardening
25CrMo4 is well suited for hardening due to its chemical composition.
Temperature: 840–870 °C
Subsequent quenching in water
Alternatively:
Temperature: 850–880 °C
Quenching in oil or an aqueous polymer solution
Tempering
Temperature: 540–680 °C
Holding time: at least 1 hour
Subsequent air cooling
Chemical composition of 1.7218
| 1.7218 25CrMo4 | C | Si | Mn | P | S | Cr | Mo | Ni | V |
|---|---|---|---|---|---|---|---|---|---|
| min. | 0,22 | 0,6 | 0,9 | 0,15 | |||||
| max. | 0,29 | 0,4 | 0,9 | 0,035 | 0,04 | 1,2 | 0,30 |
Areas of application for 1.7218
Instructions for use
- Axles and steering knuckles: Suitable due to their high strength and good toughness.
- Turbine components: Suitable for highly stressed components that require good toughness and strength.
- Highly stressed components: Suitable for components that require high mechanical strength.
- Versatile applications: Suitable for various components in mechanical and automotive engineering.
Areas of application
- Automotive engineering
- Aerospace engineering
- Mechanical engineering
- Turbine construction
- Vehicle manufacturing
- Manufacturing of axles and steering knuckles
- Manufacturing of highly stressed components
- Production of components with high strength and toughness requirements
Form of supply and availability of 1.7218
In stock
Immediately available from stock
Form of supply
Flat, forged, annealed
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/1.7218_Stahlzuschnitt.jpg "[Translate to Englisch:]")
![[Translate to Englisch:]](/fileadmin/user_upload/produkt-fotos/1.7218_Flachstahl.jpg "[Translate to Englisch:]")
![[Translate to Englisch:]](/fileadmin/user_upload/produkt-fotos/1.7218_Stahlblock.jpg "[Translate to Englisch:]")
Frequently asked questions about material 1.7218:
It is widely known to correspond to the US standard AISI 4130 (or UNS G41300) and the Japanese standard SCM430.
It is an alloyed quenched and tempered steel (chromium-molybdenum steel) characterized by a good combination of high strength and toughness.
It is used in a wide range of applications, including automotive and aerospace engineering, mechanical engineering for highly stressed components such as axles, steering knuckles, shafts, and linkages, as well as motorsport (e.g., for roll cages and frame tubes due to its excellent weldability in thin-walled applications).
Notice: Specifications contained in following data sheet are provided as a description, liability is excluded!