Product Description: Steel Round Bar D6AC / UNS K24728
Steel round bar D6AC (UNS K24728) is a high-strength alloy steel developed for use in aerospace and defense applications. The material is known for its exceptional strength, high toughness, and resistance to impact and cyclic loads, making it suitable for critical and highly loaded components.
General Technical Characteristics
D6AC steel combines ultra-high strength with good impact toughness, allowing it to perform reliably under extreme loading conditions. After heat treatment, it achieves an optimal balance of strength and ductility.
Key properties:
- ultra-high strength
- good impact toughness
- high fatigue strength
- excellent hardenability
Chemical Composition
The composition includes alloying elements that ensure superior performance:
- Carbon (C): approx. 0.45–0.55%
- Chromium (Cr): 0.9–1.2%
- Molybdenum (Mo): 0.8–1.1%
- Vanadium (V): 0.05–0.15%
- Manganese (Mn) and Silicon (Si): in moderate amounts
Molybdenum and chromium improve strength and hardenability.
Mechanical Properties
After heat treatment, the steel typically demonstrates:
- tensile strength: up to 1800–2000 MPa
- high impact toughness
- resistance to fatigue
- reliability under dynamic loads
Applications
D6AC steel round bar is used for manufacturing:
- aerospace components
- highly loaded shafts and axles
- landing gear elements
- parts operating under extreme loads
It is widely used in aerospace, mechanical engineering, and defense industries.
Features
Key advantages include:
- ultra-high strength
- excellent fatigue resistance
- reliability in severe operating conditions
- good machinability after heat treatment
Supply Formats and Standards
The steel is supplied as round bar:
- hot-rolled bars
- ground or calibrated bars
- various diameters available
The material complies with:
- ASTM A646
- AMS 6431 (UNS K24728)
Steel round bar D6AC is an optimal choice for manufacturing critical components where maximum strength, reliability, and resistance to high loads are essential.
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