7075-T6 Aluminum Bar High Hardness 150HB for Injection Molding Die Tooling with

The 7075-T6 mold grade round aluminum bar is a premium zinc-alloyed product specifically engineered for plastic injection molding, blow molding, and die tooling manufacturing applications. This material delivers exceptional hardness, compressive strength, and long-term dimensional stability critical for demanding manufacturing environments.

• Exceptional Hardness: Minimum 150 HB hardness approaches mild steel values while maintaining aluminum machinability, allowing mold components to withstand repeated clamping forces exceeding 200 tons without surface indentation or deformation.
• High Compressive Strength: Compressive yield strength of 490 MPa ensures mold plates and structural tooling components maintain dimensional stability under injection pressures up to 2000 bar without plastic deformation or creep.
• Reduced Mold Weight: At approximately 2.81 g/cm³ density, 7075 mold plates reduce total mold assembly weight by 60-65% compared to equivalent P20 tool steel designs, enabling manual handling, faster mold changes, and reduced crane requirements.
• Superior Thermal Conductivity: Thermal conductivity of 130 W/(m*K) is approximately four times higher than P20 tool steel, reducing injection molding cycle times through faster heat extraction and more uniform mold temperature distribution.
• Excellent Machinability: In the T6 temper, 7075 alloy provides good chip formation and surface finish during high-speed CNC machining, reducing tool wear and machining time compared to steel mold materials.
• Ultrasonic Inspected: Every mold grade bar undergoes ultrasonic testing per ASTM E2375 to verify internal integrity, ensuring the absence of cracks, inclusions, or porosity that could cause premature mold failure.

7075-T6 mold grade round aluminum bars are extensively utilized in the plastic injection molding industry for the manufacture of mold base plates, clamping plates, ejector plates, and backup plates in both standard and custom mold configurations.

This material is specified for multi-cavity tools producing components such as electronic device housings, automotive interior trim parts, medical device components, and consumer packaging products where rapid thermal cycling and consistent part quality are essential. The alloy's properties make it suitable for low-to-medium production volume mold applications (50,000 to 500,000 cycles) where faster cycle times and reduced mold weight provide significant economic advantages over steel tooling.

Additional applications include blow molding tool cavity blocks, die casting trim die base plates, and prototype/bridge tooling where rapid tool fabrication enables design validation and pre-production sampling in weeks rather than months.

Every 7075-T6 mold grade round aluminum bar is protected with anti-rust oil coating and individually wrapped in VCI (Volatile Corrosion Inhibitor) paper to maintain pristine surface condition. Bars are packed in ISPM 15 compliant fumigation-free plywood cases with internal separators preventing metal-to-metal contact.

A comprehensive EN 10204 3.1 mill test certificate accompanies each shipment, documenting chemical composition, mechanical properties, hardness values, and ultrasonic inspection results per ASTM E2375 Class A standards. Full traceability is maintained from certified primary aluminum billet through each manufacturing stage.

Standard stock diameters (10mm to 150mm) ship within 5 working days. Custom diameters and tight tolerance requirements are fulfilled within 15-25 working days. Value-added services include precision saw cutting, CNC surface milling, centerless grinding, and hard anodizing treatment.