Term
| Metals have ______ and ______ properties. |
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Definition
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Term
| What are mechanical properties? |
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Definition
| Mechanical properties relate to the way a metal behave. |
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Term
| What are physical properties? |
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Definition
| Physical properties are properties that help identify the metal. |
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Term
| What are the 5 important mechanical properties of metals? |
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Definition
| Hardness, ductility, toughness, tensile strength and machinability |
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Term
| What is hardness? What is an example of a hard metal? |
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Definition
| It is the ability of a metal to resist penetration and plastic deformation. Examples of hard materials are Carbide, ceramic and hardened steel. |
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Term
| What is ductility? What is an example of a ductile metal? |
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Definition
| It is the ability of a metal to be permanently deformed without breaking. Examples of ductile materials are machine steel, copper, aluminum and lead. |
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Term
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Definition
| Toughness is the ability of a metal to withstand shock and impact without breaking or shattering. |
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Term
| What is tensile strength? |
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Definition
| Tensile strength is the ability of a metal to withstand pull without breaking. |
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Term
| What is Machinability? What is an example of a metal with high machinability? |
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Definition
| Machinability measures the ease with which a metal can be cut and shaped, it is expressed using a base number of 100. Examples of highly machinable metals are brass and aluminum (soft) |
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Term
| What is hot rolled steel? What does it look like? |
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Definition
| Hot rolled steel is produced by drawing red-hot billets through rollers. It's the cheapest type of steel product and is only used when the size and finish of the stock is not important. It's recognized by its black oxidized surface. |
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Term
| What is cold rolled steel? What does it look like? |
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Definition
| Cold rolled steel is formed by cleaning the scale from hot-rolled billets and then drawing them through rollers or dies until the desired shape and size are reached. Cold rolling creates a finished product thus it is more expensive than hot-rolled steel. It is recognized by its smooth, grey surface. |
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Term
| What is the major downside to cold-rolled steel? |
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Definition
| Cold-rolling steel creates internal stresses causing it to warp during machining. |
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Term
| How is cold-drawn wire and tubing made? |
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Definition
| It is made by pulling a steel rod through one or more dies. |
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Term
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Definition
| A pipe is any tubular steel product that is produced in a size commonly used for piping systems. |
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Term
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Definition
| Tubing is any tubular product, other than pipe and includes square and rectangular shapes, as well as round. |
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Term
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Definition
| For pipes under 12" in diameter the nominal size refers to a standardized outside diameter which, given a standard wall thickness, would provide an inside diameter rougly equal to the nominal size. For pipes over 14 inches in diameter the nominal size equals the outside diameter of the pipe. |
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Term
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Definition
| For tubes the outside diameter equals the nominal size. |
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Term
| What are 3 forms that both hot and cold rolled steel are produced in? |
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Definition
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Term
| What are 2 forms that can only be produced through cold rolling? |
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Definition
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Term
| What is carbon steel? What are the properties of Low carbon steel? Medium Carbon Steel? High Carbon steel? |
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Definition
| Carbon steel contains carbon and iron but no other significant alloying elements. Low carbon steel cannot be hardened. Medium carbon steel has better mechanical properties than low carbon and can be hardened. High carbon steel is meant to be hardened and is found in cutting tools like taps and drills |
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Term
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Definition
| It is the process of making wire or tubing by pulling a steel rod through one or more dies. |
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Term
| What is the difference between pipe and tubing? |
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Definition
| A pipe is any tubular steel product that is produced in a size commonly used for piping systems. Tubing is any tubular product other than pipe. This can include square and rectangular shapes. |
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Term
| What is the carbon content of Low Carbon Steel? Medium Carbon Steel? High Carbon Steel? |
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Definition
Low Carbon Steel (0.02-0.30%)
Medium Carbon Steel (0.30%-0.60%)
High Carbon Steel (over 0.60%) |
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Term
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Definition
| Alloy steel contains significant elements other than iron and carbon. These elements are added to improve its mechanical properties. |
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Term
| What is HSLA? What are the benefits and common applications of HSLA? |
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Definition
| HSLA is High Strength Low Alloy Steel. It is a low carbon structural steel. The rust that will form on the outer skin of the steel is impervious to water and will prevent the steel from rusting further. It is ideal for bridges, truck trailers and other structures exposed to the environment. |
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Term
| What is Quench and temper structural steel? |
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Definition
It is steel with a higher carbon content than high strength low alloy steel. It can be hardened and posseses corrosion resistance and a high strength to weight ratio.
(Summary: More carbon than HSLA. Can be hardened and it has corrosion resistance and a high strength to weight ratio) |
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Term
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Definition
It is a steel that uses elements other than carbon for hardening and carbon is considered an impurity and must be kept to a minimum. It is high in nickle, cobalt and molybdenum. It may be hardened without fear of distirtion and it is very easy to weld.
(Summary: Doesn't use carbon to harden, does not distort when hardened and is easy to weld) |
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Term
| What are tool steels? What are the two types of high speed tool steels? |
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Definition
| Tool steels are an expensive, high quality steel. It is made for cutters, tools, dies molds and jigs. The two types of HSS are tungsten and molybdenum. |
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