713 aluminum alloy is recognized for its strong mechanical performance and dependable casting characteristics. Its balanced composition supports durability, impact resistance and efficient machining across a range of industrial applications.
713.0 (7.5Zn-0.7Cu-0.35Mg) Aluminum Alloy
- Former designation. 613, Tenzalloy
- Former ASTM. B26 ZC81A
- Former SAE. 315
- UNS number. A07130
- Government. QQ-A-601, QQ-A-596
- Description: 713 is commonly not heat treated. We typically always use 713.1 aluminum alloy. 713 is a high-strength aluminum casting alloy that has tensile, yield and elongation properties equivalent to the common heat treated alloys such as 355-T6 and 319-T6. The impact strength of 713 is greater than any of these alloys, and in several instances, the elongation is higher. 713 attains its strength by a natural aging process that gradually takes place at room temperature. The typical properties are reached after 10-14 days, and when testing for specification purposes, a 21-day period is used. Some slight further aging and strengthening takes place up to six months, at which time the alloy is stable and no further change of any kind takes place.
713 Aluminum Alloy Properties and Specifications
713 is a high-strength aluminum alloy formulated with zinc, copper and magnesium. This combination enhances mechanical strength and wear resistance while maintaining the lightweight advantages aluminum is known for.
The alloy’s composition makes it well-suited for applications where structural performance and durability are critical. With its strong mechanical properties and reliable castability, 713 aluminum alloy is commonly used for components that must perform consistently in demanding industrial environments.
| Typical Aluminum Alloys (a) | Approx. Weight, lb./in.3 | Resistance to Corrosion (b) | Relative Machinability (c) | Castability (k) | Weldability (Arc) (d) | Typical Mechanical Properties | ||||||||||
| AA | Former AA Designation | ASTM Spec. No. | Federal Spec. No. | SAE Alloy No. | General | Stress Corrosion Cracking | 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) | ||||
| 713.0-T5 | 613, Tenzaloy | B26 | QQ-A-601 | 315 | 0.102 | 2 | B | 1 | 4 | 4 | 35 | 25 | 4 | 26 | 9 | 74 |
Alloy 713 Chemical Composition
| Designations and nominal compositions of common aluminum alloys used for sand casting | |||||||
|---|---|---|---|---|---|---|---|
| AA Number | Former AA designations | Former ASTM number | Cu | Mg | Mn | Si | Others |
| 713.0 | T5 | 210 | 30 | 150 | 22 | 180 | 26 |
Maximum Impact Resistance
In addition to its strength, 713 aluminum alloy demonstrates strong resistance to impact and mechanical shock. Components produced with this alloy can absorb sudden forces without cracking or deforming easily. This durability makes the alloy well-suited for applications where equipment may be exposed to vibration, sudden loads or challenging operating environments.
Excellent Machinability and Finishing
713 aluminum casting also allows manufacturers to produce precise components with tight tolerances. Its machinability supports efficient drilling, milling and finishing processes, which helps reduce production time and maintain consistent part quality. Additionally, 713 aluminum can achieve smooth surface finishes, making it suitable for applications where appearance and dimensional accuracy are important.
Another advantage of working with 713 aluminum alloy is its consistency during the casting process. When produced under controlled foundry conditions, the alloy allows manufacturers to achieve reliable part quality and repeatable results across production runs.
| Characteristics of common aluminum alloys used in sand casting | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Alloy | Fluidity | Resistance to hot cracking | Pressure tightness | Heat Treatment | Strength at elevated temperatures | General corrosion resistance | Machining | Polishing | Anodizing Appearance | Weldability |
| 713.0 | 3 | 4 | 4 | No | 4 | 3 | 1 | 1 | 1 | 4 |
Common Applications for 713 Cast Aluminum
713 aluminum alloy is often used for cast components in demanding industrial environments, including:
- Automotive: In the automotive industry, 713 aluminum alloy is used for parts like engine blocks and transmission housings.
- Aerospace: Due to its high strength-to-weight ratio, 713 is a top choice for aircraft components and structural parts, contributing to fuel efficiency and overall performance.
- Machinery manufacturing: It’s a popular material for various industrial machinery components, where it can withstand mechanical stress and wear.
- Medical equipment: 713’s high strength, nonmagnetic properties and corrosion resistance make it suitable for MRI machines and other medical devices requiring reliability.
Typical applications include structural housings, mechanical brackets, equipment components and other parts that require reliable strength while benefiting from aluminum’s lightweight properties. This alloy’s balanced performance makes it a practical option for manufacturers seeking durable cast solutions.
Design engineers often select 713 aluminum alloy when performance and manufacturability must work together. Its mechanical characteristics allow components to handle structural demands while still supporting efficient casting and finishing processes. This balance gives manufacturers greater flexibility when designing parts that must meet performance standards without introducing unnecessary complexity into production.
| Alloy | Uses |
|---|---|
| 713.0 | General-purpose casting alloy for applications that require strength without heat treament or that involve brazing |
| Typical Tensile Properties for separately cast test bars of comon aluminum casting alloys | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Alloy | Temper | Tensile strength | Yield strength | Shear strength | Compressive yield strength | Elongation % | ||||
| Mpa | ksi | Mpa | ksi | Mpa | ksi | Mpa | ksi | |||
| 713.0 | T5 | 210 | 30 | 150 | 22 | 180 | 26 | 170 | 25 | 3 |
Other Aluminum Specs:
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