Product Description: Steel Round Bar HY-TUF AMS 6425
Steel round bar HY-TUF (AMS 6425) is a high-strength alloy steel specifically developed for applications involving severe dynamic and impact loading. The material is widely used in aerospace and mechanical engineering due to its excellent combination of strength and toughness.
General Technical Characteristics
HY-TUF steel offers improved impact toughness compared to conventional 4340-type steels while maintaining a high level of strength. It ensures reliable performance under extreme service conditions and in critical components.
Key properties:
- high strength
- enhanced impact toughness
- excellent fatigue resistance
- good hardenability
Chemical Composition
The composition is optimized to improve toughness and strength:
- Carbon (C): approx. 0.38–0.43%
- Nickel (Ni): 1.65–2.00%
- Chromium (Cr): 0.7–0.9%
- Molybdenum (Mo): 0.2–0.3%
- Manganese (Mn) and Silicon (Si): in moderate amounts
Balanced alloying provides high strength and resistance to fracture.
Mechanical Properties
After heat treatment, the steel typically demonstrates:
- tensile strength: up to 1600–1900 MPa
- high impact toughness
- excellent fatigue resistance
- reliability under dynamic loads
Applications
HY-TUF steel round bar is used for manufacturing:
- aerospace components
- shafts and axles
- highly loaded gears
- high-strength fasteners
- parts subjected to impact loads
It is widely applied in aerospace, defense, and mechanical engineering industries.
Features
Key advantages include:
- improved toughness compared to similar steels
- high reliability under impact loading
- long service life
- stable performance characteristics
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:
- AMS 6425 (HY-TUF)
Steel round bar HY-TUF is an excellent choice for manufacturing critical components where high strength, toughness, and reliability under severe operating conditions are required.
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