319.0 (6Si-3.5Cu) Aluminum Alloy
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319 aluminum alloy is a strong, versatile alloy that offers significant advantages for your application.
- Former designations: 319, Allcast
- Former ASTM: SC64D
- SAE: 326
- UNS number: A03190
- Foreign: ISO AlSi6Cu4, AC 2A, 3052, A-S5U, A-S5U3, EN AC-45400, EN AC-45200, LM 22, G-AlSi6Cu4, ISO AlSi5Cu3
- Description: 319 is commonly not heat-treated. We typically use 319.1 aluminum alloy.
Chemical Composition of 319 Aluminum Alloy
The 319 aluminum alloy consists of several constituent metals and minerals, including the following:
- Aluminum (Al): As the base metal, aluminum is the largest constituent of this alloy. It is preferred because it is fairly lightweight.
- Copper (Cu): The 319 alloy may contain up to a maximum of 3.5% copper. It improves the alloy’s corrosion resistance and adds strength.
- Silicon (Si): Silicon constitutes up to 6% of this alloy. It offers strength enhancement and helps make the alloy cast better.
- Iron (Fe): 319 contains a maximum of 1% iron. It is a small-scale impurity present in most alloys and can be damaging in larger quantities.
- Manganese (Mn): This alloy may contain up to 0.1% manganese, which makes the alloy more corrosion resistant and improves strength.
- Zinc (Zn): Zinc may comprise up to 1% of this alloy and offers additional strength.
- Magnesium (Mg): 319 may contain around 0.1% magnesium, improving strength and the alloy’s ability to accept heat treatments.
- Titanium (Ti): This alloy should contain no more than 0.25% titanium, which refines the alloy’s grain structure.
| Designations & nominal compositions of common aluminum alloys used for sand casting | |||||||
|---|---|---|---|---|---|---|---|
| AA Number | Former AA designations | Former ASTM number | Cu | Mg | Mn | Si | Others |
| 319.0 | 319, Allcast | SC64D | 3.50 | … | … | 6.00 | … |
Properties and Qualities of 319 Aluminum Alloy
The 319 aluminum alloy demonstrates some excellent characteristics, as expressed in this table.
| 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 Apperance | Weldability |
| 319.0 | 2 | 2 | 2 | Optional | 3 | 3 | 3 | 4 | 4 | 2 |
Characteristics are comparatively rated from 1 to 5 — 1 is the highest or best possible rating.
| Alloy | Uses |
|---|---|
| 319.0 | Engine crankcase covers, electrical boxes, gear boxes |
Excellent Castability
319 aluminum is one of the better casting alloys. We can easily produce intricate or complex designs when using this alloy.
Corrosion Resistance
While it lacks the corrosion resistance of some other alloys, 319 is well suited for environments where exposure to moisture and corrosive chemicals is limited.
Favorable Machining Characteristics
This alloy has good machinability characteristics, making it optimal for cast items requiring further processing.
Mechanical Properties of 319 Aluminum: Tensile Strength
319 aluminum demonstrates good tensile strength, showing 27 ksi in the fabricated state and 36 ksi with a T6 temper.
| Typical Tensile Properties for separately cast test bars of common aluminum casting alloys | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Alloy | Temper | Tensile strength | Yield strength | Shear strength | Compressive yield strength | Elongation % | ||||
| Mpa | ksi | Mpa | ksi | Mpa | ksi | Mpa | ksi | |||
| 319.0 | F | 185 | 27 | 125 | 18 | 150 | 22 | 130 | 19 | 2 |
| 319.0 | T6 | 250 | 36 | 165 | 24 | 200 | 29 | 170 | 25 | 2 |
Common Applications of 319 Aluminum Alloy
319 aluminum has excellent characteristics that make it a versatile casting material. Some common applications include:
- General commercial applications
- Automotive parts (engine parts, oil pans, etc.)
- Aerospace components
- Components for marine applications
- Electrical conduits and housings
Get 319 Castings From Warner Brothers Foundry Company
You know you’re ordering top-quality products when you order your 319 aluminum alloy castings from Warner Brothers. Our high-quality castings save you time and money, thanks to our efficient service and short turnaround times.
Invest in the craftsmanship and efficiency of products manufactured with 319 aluminum casting alloys. Contact us today for a quote or to discuss your requirements.
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If you’re interested in a custom, aluminum solution, get in touch with us today for a quote!
