Alloys & Ferrous Metals

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Plain carbon steels are designated in the AISI code system by:

10XX

What is a binary phase diagram?

A phase diagram indicating the phases of two metallic elements as a function of composition and temperature at atmospheric pressure

As temperature is increased to slightly above 912 degrees C, pure iron transforms into which one of the following phases?

Austentine

The two most important processes in steelmaking are?

Basic oxygen furnace & electric arc furnace

What element is the most important alloying ingredient in steel?

Carbon

Which of the following alloying elements are most commonly associated with stainless steel?

Chromium and Nickel

What is the most important cast iron commercially?

Gray cast iron

What is the principal ore used in the production of iron and steel?

Hematite

What property or characteristics do not apply to metals?

High electrical resistivity and Ionic bonding

A steel with 1% carbon is known as which one of the following?

Hypereutectoid

The strength and hardness of steel increases as carbon content:

Increases

An alloy is a metal composed of two or more elements, at least one of which is metallic. The two main categories of alloys are?

Intermediate phases and solid solutions

High speed steels are used in cutting tools for machining. Which alloying elements are used in the highest proportion in high-speed steel?

Molybdenum & Tungsten

The iron tapped from the blast furnace is what?

Pig iron

The principal strengthening mechanism in high-strength low-alloy steels is what?

Solid solution alloying

What is a eutectic alloy?

The composition in an alloy system for which the solidus and liquidus are at different temperatures & the composition in an alloy system that has the lowest melting point

The inverse lever rule is used to determine what in a binary phase diagram?

The proportions of each phase present at a given temperature

What is not an important alloying ingredient in steel?

Zinc


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