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    • Successful manufacturing requires mastery of a critical body of knowledge that includes essential concepts in applied mathematics, measurement and inspection, safety, and quality/lean.

    • Materials are very important to manufacturing and determine how well your application performs. Today, options include metals, ceramics, plastics, and composites, to name a few.

    • Machining best practices are specific to either the task or the device. For grinding, metal-cutting, or work holding, many tools can be used to complete the task.

    • Every workplace requires an understanding of the essential safety practices and topics that help employees to avoid potential hazards.

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2040 – 03 – Defining Density

If you know a metal’s mass, then you can figure out its density. Density refers to the size and closeness of the molecules that compose a material; it’s the mass-per-unit volume. A high density means that an object is tightly packed with molecules. Pound cake, for example, has high density, while angel food cake has lower density.

A common figure used in manufacturing is the strength-to-weight ratio. It compares the density of a metal to its strength. This comparison shows the value of a metal’s strength relative to its price, which usually depends on its weight.

Titanium, for example, has a high strength-to-weight ratio: it weighs less than other metals, but can perform equally well under similar conditions. This makes it the ideal metal to use when building aircraft, or in other lightweight, high-strength products.

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Class: 2040 - Physical Properties of Metals - 10 Lessons
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