Alloys & Ferrous Metals
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
