7A04 Aluminum Bar
7A04 aluminum bar (also known as LC4) is a high-strength, heat-treatable aluminum alloy. It is specifically designed for applications requiring an excellent strength-to-weight ratio. Because its mechanical properties are close to those of certain steels while retaining the lightweight characteristics of aluminum, this alloy is often referred to as “super-hard aluminum.” This aluminum alloy is widely used in aerospace, automotive, and defense industries, where high strength and durability are required.
Advantage |
Description |
|
Ultra-High Strength |
7A04 offers one of the highest strength levels among commercially available aluminum alloys, making it suitable for replacing steel in many applications. |
|
Excellent Strength-to-Weight Ratio |
With a density of only 2.85 g/cm³, it provides significant weight savings compared to steel while maintaining high structural integrity. |
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Good Machinability |
In the T6 temper, 7A04 has good machinability, allowing for precise fabrication of complex parts. |
|
Heat Treatable |
The alloy responds well to heat treatment (T6 temper), allowing for significant strengthening after fabrication. |
|
High Hardness |
The high hardness makes it resistant to wear and deformation under load. |
Our 7A04 aluminum alloy rod bar conform to international standards such as ASTM B221, EN 485-2, GB/T 3191-2019. We can also provide Material Testing Certificates (MTC) and third-party inspection reports upon request to ensure quality assurance and traceability for your critical applications. We offer a variety of thicknesses and widths to meet diverse application needs, and provide standard and custom sizes to meet specific design requirements.
HSTF is a professional aluminum rod bar manufacturer and supplier in China. We possess a mature supply chain system, advanced equipment, and technology, ensuring our products are highly competitive in terms of cost and price, approximately 5-10% lower than market prices.
Specification
| Alloy | 7A04 |
| Temper | O, T6, T6511, T73, T73511, T76, T76511 |
| Type | extrusion, cold processing, casting, forging |
| Shape | Round Bar, Square Bar, Hexagonal Bar, Rectangular Bar |
| Diameter (Round Bar) | 5mm – 600mm (Custom sizes available) |
| Length | 1m – 6m (Standard), Custom lengths available |
| Surface Treatment | Mill Finish, Anodized, Polished |
7A04 Aluminum Alloy Bar Chemical Composition
| Element | Composition Range (%) |
| Si | 0.50 |
| Fe | 0.50 |
| Cu | 1.4-2.0 |
| Mn | 0.2-0.6 |
| Mg | 1.8-2.8 |
| Cr | 0.1-0.25 |
| Zn | 5.0-7.0 |
| Ti | 0.10 |
| Others (Each) | 0.05 |
| Others (Total) | 0.15 |
| Al | Rem |
7A04 Aluminum Alloy Bar Physical Properties
| Density | 2.72 g/cm³ |
| Melting point | 562-646°C |
| Thermal conductivity | 150 W/m·K |
| Coefficient of thermal expansion | 23.2 µm/m·°C |
| Electrical conductivity | 40 % IACS |
7A04 Aluminum Alloy Bar Mechanical Properties
| Tensile strength Rm/Mpa | 530 |
| Yield strength Rp0.2/Mpa | 400 |
| Elongation | 6% |
| Hardness | 156HB |
7A04 Aluminum Alloy Bar Heat Treatment Specification
| Homogenization annealing | heating at 450～465℃; keeping warm for 12～14h; furnace cooling. |
| Full annealing | heating at 390～430℃; keeping warm for 30～120min; furnace cooling to 150℃ and air cooling. |
| Quenching and aging | quenching at 465～480℃, water cooling; artificial aging (aluminum-clad sheet) 115～125℃24h, (unclad aluminum profile) 135～145℃16h, (semi-finished products) heating at 115～125℃3h for level 1, air cooling at 155～165℃3h for level 2. |
HSTF 6101 Aluminum Bus Bar Temper and Performance
7A04 Extrusion Aluminum Bar
- Temper: O,T6,T6511,T73,T73511,T76,T76511
- DIA: 0.4″-16″(10-420mm)
- Formed Formed by hot extrusion, it has ultra-high strength and high hardness, and is often used in aerospace structural components.
7A04 Cold Finished Aluminum Bar
- Temper: O,T6,T651,T73,T7351
- DIA: 0.2″-8″(5-200mm)
- Cold deformation process strengthens the material, resulting in higher strength and surface finish, but relatively lower plasticity.
7A04 Aluminum Cast Billets Bar
- Temper: F
- DIA: 4.8″-53″(124-1350mm)
- Material used for subsequent extrusion production, It has good casting properties.
7A04 Aluminum Forged Bar
- Temper: T6,T652,T73,T7352
- DIA: 7.8″-40″(200-1000mm)
- Made by forging process, it has extremely high strength, fatigue resistance and high temperature resistance.
7A04 Aluminum Round Bar
7A04 Aluminum Square Bar
Large Diameter 7A04 Aluminum Rod
7A04 Aluminum Flat Bar
HSTF Other Popular Products
Application
7A04 Aluminum Bar for Aerospace
7A04 aluminum bars, with their ultra-high specific strength and good fracture toughness, have become a core material for main load-bearing structures in aerospace applications.
- Aircraft wing main spars and stringers
- Fuselage frame and skin reinforcements
- Landing gear struts and actuator supports
High-speed Rail and Rail Transit
7A04 aluminum bars can significantly reduce weight and improve structural fatigue resistance and impact resistance in the rail transit field.
- EMU bogie crossbeams and side beams
- Coupleds and load-bearing components of buffer devices
- Key nodes of car body underframe and floor beams
7A04 Aluminum Bar for High-end Construction Machinery
The 7A04 aluminum bars provide a high-strength, wear-resistant, and fatigue-resistant load-bearing solution for extreme operating environments.
- Excavator boom hinge support and boom joint
- Crane boom pin seat and turntable structural components
- Mining dump truck frame and suspension connection structure
7A04 Aluminum Bar for Specialty Sports Equipment
The 7A04 aluminum rod meet the performance requirements of extreme sports and high-end equipment with their ultra-high specific strength and lightweight design.
- Main load-bearing components for professional rock climbing equipment
- Archery bow plates and main structure for compound bows
- High-performance road/mountain bike frames
7A04 Aluminum Bar for Defense and Military
7A04 aluminum rod is used in the military industry to manufacture key tactical equipment structures that require high load-bearing capacity and lightweight construction.
- Tank/Armored Vehicle Road Wheel Brackets and Suspension Arms
- Missile Shells and Missile Body Load-Bearing Sections
- Main Load-Bearing Frames of Military UAVs
Package
| Packing | 1,Generaally package:Anti-water paper+strapped with min three strapping strips. |
| 2,Standard exporting package:Anti-water paper and plastic+covered by iron shrrt+strapped with min three strapping strips. | |
| 3,Excellent package:Anti-water paper and plastic film+covered by iron sheet+strapped with min three strapping strip+fixed on the iron or wooden pallets by strapping strips. | |
| Shipping | 1,Shipping by containers |
| 2,Shipping by bulk ship | |
| Custom | Customization is available upon request |
Why Choose Us?
- Premium Products: Using high-quality aluminum billets and precise alloying and heat treatment processes, we optimize strength and ductility, ensuring uniform cooling and annealing. This guarantees high tensile strength and excellent performance.
- Grain Control: Produced through reverse extrusion, our aluminum bars have controlled cooling rates and homogenization treatment, maintaining grain size at ≤0.5mm to minimize quality defects, enhance material consistency, and refine microstructure.
- Timely Delivery: With a 10,000-ton inventory, standard sizes are ready for immediate dispatch. Advanced equipment and a skilled team ensure fast production cycles and reliable logistics for on-time delivery.
- Competitive Pricing: We support both retail and bulk procurement for metal distributors, offering discounts and rebate policies for B2B customers. Transparent pricing ensures our aluminum bar quality comes at a price advantage.
- Comprehensive Quality Testing: We implement strict multi-step testing, including tensile strength, elongation, ultrasonic testing, and metallographic inspection, ensuring that our aluminum bars meet AMS, EN, and NADCAP standards.
- Customer Service: We provide complete after-sales support, addressing customer concerns with an experienced technical team offering professional advice and guidance, and an established customer service system to guarantee an exceptional service experience.
