535.0 (7Mg) Aluminum Alloy
Achieving strong, stable casting components typically calls for intensive heat treatment. These processes can add cost, time and potential for distortion. With 535 aluminum alloy, that challenge disappears.
Typical Properties & Characteristics of Aluminum Sand Castings
- Former designations: Almag 35.
- Former AMS: 4238A, 4239
- Former ASTM: GM70B
- UNS number: A05350
- Government: QQ-A-601, QQ-A-371
- Description: The aluminum alloy 535, better known as Almag 35, is a lightweight, high-strength aluminum magnesium alloy that doesn’t require heat treatment. Almag 35 offers excellent corrosion resistance, machines well and is dimensionally stable, making it ideal for products such as instruments or marine aluminum sand castings, among other uses.
| Typical Aluminum Alloys (a) | … | Resistance to Corrosion (b) | … | … | … | Typical Mechanical Properties | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AA | Former AA Designation | ASTM Spec. No. | Federal Spec. No. | SAE Alloy No. | Approx. Weight, lb./in.3 | General | Stress Corrosion Cracking | Relative Machinability (c) | Castability (k) | Weldability (Arc) (d) | Ultimate Tensile Strength, ksi (i) | Yield Strength Tension, ksi (e) (i) | Elongation, Percentage in 2 in. (Round Specimen, 1/2" Dia.) (f) (i) | Shear Strength, ksi (g) | Fatigue Endurance Limit, ksi (h) | Brinell Hardness (500-kg Load, 10-mm Ball) (j) | ||||||||||
| 535.0-F | Almag 35 | B26 | QQ-A-601 | 324 | 0.095 | 1 | A | 1 | 5 | 4 | 40 | 21 | 13 | 28 | 10 | 70 | ||||||||||
| AA Number | Former AA designations | Former ASTM number | Cu | Mg | Mn | Si | Others |
|---|---|---|---|---|---|---|---|
| 535.0 | Almag 35 | GM70B | … | 6.80 | 0.18 | … | 0.18 Ti |
| Alloy | Fluidity | Resistance to hot cracking | Pressure tightness | Heat Treatment | Strength at elevated temperatures | General corrosion resistance | Machining | Polishing | Anodizing Appearance | Weldability |
|---|---|---|---|---|---|---|---|---|---|---|
| 535.0 | 5 | 4 | 5 | Optional | 3 | 1 | 1 | 1 | 1 | 4 |
| Alloy | Uses |
|---|---|
| 535.0 | Marine industry, corrosive prone applications |
| Typical Tensile Properties for separately cast test bars of comon aluminum casting alloys | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Alloy | Temper | Tensile strength | Shear strength | Tensile strength | Shear strength | Elongation % | ||||
| Mpa | ksi | Mpa | ksi | Mpa | ksi | Mpa | ksi | |||
| 535.0 | F | 275 | 40 | 140 | 20 | 190 | 27.5 | 162 | 23.5 | 13 |
High-Performance Properties of 535 Aluminum Alloy
535 is a high-strength aluminum that stands out for its substantial magnesium content. Here’s what sets it apart from other casting alloys:
Unmatched Strength Without Heat Treatment
This alloy combines tensile strength and light weight without any secondary heat treatment. Its as-cast properties eliminate the complexity of additional processing, providing faster turnaround and lower production costs for your project. Components maintain their intended shape throughout manufacturing, allowing for consistently tight tolerances.
Excellent Corrosion Resistance
535 aluminum alloy features superior corrosion resistance, particularly in marine and chemically aggressive environments. This resistance makes it a reliable choice for humid, saltwater and industrial applications. The alloy’s resilience extends service life and reduces maintenance requirements, protecting your investment over time.
Superior Machinability and Stability
Thanks to its low silicon content, Almag 35 offers exceptional machining characteristics. This machinability minimizes tool wear and delivers quality surface finishes. The alloy’s dimensional stability ensures that tight-tolerance components hold their form throughout production and service. As such, 535 is ideal for precision-critical applications.
Common Applications of Almag 35 Castings
535 aluminum alloy’s reliable performance makes it the choice material across these demanding industries:
- Aerospace, marine and military: This alloy is widely specified for instrument housings, structural fittings and specialized hardware where corrosion resistance is essential. In saltwater environments and high-stress applications, 535 maintains its integrity where other materials would degrade. Its strength-to-weight ratio makes it particularly valuable in weight-sensitive military and aerospace components.
- Automotive and electrical: High-performance automotive applications benefit from 535’s combination of strength and reduced weight. The alloy is often used for chassis components, structural brackets and frames needing load-bearing capacity without excessive mass. In electrical applications, it supports long-term reliability in housings, enclosures and mounting hardware.
- High-value instruments and equipment: Precision manufacturing depends on materials with dimensional accuracy. Almag 35’s stability makes it an excellent choice for robotics components, measuring instruments, computing device housings and applications where minor dimensional changes could impact performance. The alloy’s machinability supports complex part production while maintaining strict tolerances.
Partner With America’s 535 Casting Experts
Warner Brothers Foundry Company brings more than 70 years of non-ferrous casting experience to every Almag 35 project. Our family-owned foundry specializes in air-set sand casting processes that maximize the alloy’s natural advantages.
When your application demands 535 aluminum’s distinct capabilities, Warner Brothers is here to help. To discuss your next casting project with our team, call us at 586-315-6985 or request a quote online today.
Other Aluminum Specs:
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