Types of Alloys Used in Die Casting

In many cases, the need for shortening fabrication time, post-production machining, and rising the cost-efficiency of the process can get eliminated or reduced. While it can become difficult to die casting sturdier metals, such as certain grades of steel, you will find other types of well-suited methods for them.

From hardened steel die casting molds are usually constructed and in a die casting machine they are often the most expensive component. With varying results, these molds can handle a range of different alloy families, but on metals, with low fusing temperatures alloy die casting is generally most effective. For this particular reason, the common die casting alloys fall into a handful of categories depending on their composition and material properties.

Types of Alloys and Their Uses

Lead Alloys

Like tin alloys, for their corrosion resistance, lead-based materials tend to be used and in applications requiring no more than 8000 pounds of tensile strength per square inch. Common applications that are included are various decorative metal goods, fire-safety equipment, and bearings. For producing castings less than 15 pounds they are relatively inexpensive, but for products that will be in contact with food lead alloys cannot be used.

Zinc Alloys

In die casting, Zinc-based materials are relatively easy, and to the die molding process, they respond well. In specific ratios, these materials are comprised of multiple metals. For example, a typical zinc-based die casting workpiece consists of 7 to 10 percent tin, 86 percent zinc, and 4 to 7 percent copper. The workpiece becomes more flexible by little higher proportions of tin, while increased copper levels improve rigidity. In the range of 700 to 800 degrees, Fahrenheit Zinc alloys have a melting point. You will find many alloy die casting company for alloy manufacturing.

In place of cast iron or brass, Zinc die castings are often used, but compared to their sturdier counterparts they tend to have lower tensile strength. During the alloying process, unless it is specially reinforced, zinc-based material cannot exceed approximately 17,000 pounds per square inch of force. As a result, in applications involving high mechanical loads die cast zinc products are generally not used. By alkaline substances or salt-water Zinc, castings can get corroded, and despite atmospheric conditions, they are often plated to preserve their luster.

Aluminum Alloys

In automobile parts and gears Die cast aluminum alloys are often found, and in the past, they have been used to create surgically instruments. Compared to most zinc-based materials they are generally stronger and lighter but tend to be more expensive to create. The need for finishing treatments, such as plating can be reduced by using aluminum alloys, and a common grade is composed of 92 percent aluminum mixed with 8 percent copper. To improve its tensile strength from around 21,000 pounds per square inch to approximately 32,000 per square inch Magnesium may be added to this alloy, while to increase rigidity and provide a higher surface finish nickel can be included.

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Created on Feb 8th 2021 01:54. Viewed 219 times.

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