Hot-Forged Aluminum Alloy Billet

Hot-forged aluminum alloy billet is a semi-finished industrial material produced through controlled heating and initial deformation processes. It serves as the primary feedstock for subsequent precision forging, pressing, and stamping operations in metalworking supply chains. This material is engineered to have specific metallurgical properties that optimize formability and final part strength. Manufacturers rely on consistent billet quality to reduce defects and improve production efficiency in automotive, aerospace, and machinery component fabrication.

The billet is typically supplied in round or rectangular cross-sections, with diameters ranging from 50 to 500 mm and lengths from 100 to 3000 mm, cut to length on request. Common alloy grades include 6061, 6082, and 7075, with the specific designation determining mechanical and physical properties. Forging temperatures are typically in the range of 400–500 °C, ensuring optimal plasticity. Yield strength varies from 240 to 500 MPa depending on alloy and temper, while hardness ranges from 60 to 150 HB. Grain size is controlled to ASTM 5–8, and thermal conductivity is between 150 and 200 W/m·K. Density ranges from 2.70 to 2.82 g/cm³, and surface roughness after machining is typically Ra 1.6–3.2 μm. Tolerances are held to ±0.5 mm, with tighter tolerances possible on request. Weight per piece ranges from 5 to 500 kg, based on dimensions.

Relevant standards for procurement and verification include ASTM B247 for alloy and forging, ASTM E8 for tensile testing, ASTM E112 for grain size, ASTM E1461 for thermal conductivity, GB/T 3191 for dimensions, ISO 2768-m for general tolerances, ISO 1302 for surface texture, ASTM B311 for density, and ASTM E10 for hardness. These standards serve as references; actual compliance must be confirmed with the supplier.

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Aluminum alloy is heated to forging temperature (typically 400–500 °C) and subjected to compressive forces, such as pressing or hammering, to create a uniform grain structure and a preliminary shape. This initial deformation refines the cast structure, eliminates porosity, and aligns the grain flow, preparing the material for final forming operations like precision forging, stamping, or machining. The controlled heating and deformation ensure that the billet has consistent mechanical properties, such as yield strength and hardness, which are critical for downstream processing.