Product Description: Steel Round Bar 1.6745 / 40NiMoCr10-5
Steel round bar 1.6745 (40NiMoCr10-5) is a high-quality alloy structural steel designed for manufacturing critical components operating under high loads. The material combines high strength, good toughness, and excellent hardenability, making it suitable for demanding engineering applications.
General Technical Characteristics
1.6745 steel is characterized by high strength and resistance to dynamic and impact loads. After heat treatment, it provides an optimal balance of hardness and ductility, ensuring reliable performance in service.
Key properties:
- high strength
- good impact toughness
- excellent hardenability
- resistance to fatigue loads
Chemical Composition
The composition includes alloying elements that ensure superior performance:
- Carbon (C): approx. 0.37–0.44%
- Nickel (Ni): 2.25–2.75%
- Chromium (Cr): 0.5–0.8%
- Molybdenum (Mo): 0.2–0.4%
- Manganese (Mn) and Silicon (Si): in moderate amounts
Nickel improves toughness, while chromium and molybdenum enhance strength and hardenability.
Mechanical Properties
After heat treatment, the steel typically demonstrates:
- tensile strength: up to 900–1100 MPa
- good impact toughness
- high fatigue strength
- resistance to deformation
Applications
1.6745 steel round bar is widely used for manufacturing:
- shafts and axles
- gears
- transmission components
- heavily loaded machine parts
It is commonly used in mechanical engineering, energy, and heavy industry.
Features
Key advantages include:
- reliable performance under load
- good balance of strength and toughness
- fatigue resistance
- versatility of application
Supply Formats and Standards
The material is supplied as round bar:
- hot-rolled bars
- ground or calibrated bars
- various diameters available
The steel complies with:
- EN 10083 (1.6745 / 40NiMoCr10-5)
Steel round bar 1.6745 is an excellent choice for producing critical components where strength, reliability, and durability under high loads are essential.
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