Engineering Materials

SAE

AISI

ASTM

What does ANSI do?

In the four digit system that SAE and AISI use for identifying steels:
a. The first digit represents____________
b. The second digit represents_________
c. The third and fourth digit represent_______

1040 steel contains what percentage of carbon?

The major classes of steels we discussed were:

The 11xx and 12xx classes of Carbon steels have been reformulated, invreasing Phosphorous and/or Silicon in order to improve _________. These are called ______ _______ steels.

While the addition of sulfur and phosphorous to steels improve machinability, they also _______ the steel.

The 15xx class of Carbon steel has increased  _ to improve _________.

HSLA steels have high _________ and low ____.

HSLA steels ate usually 20-30% _________ than carbon steel of the same strength.

HSLA steels are more resistant to  __ than most carbon steels due to their lack of ________.

Tool Steels

Classification of tool steels is largely based on _ characteristics.

The 4 major categories of Tool Steels are:

In general Tool Steels are:

A major difference between Carbon/Alloy steels and Tool steels is that Tool steels contain embedded ___________.

Tool steels have high ________ and ________ resistance.

Stainless Steels are alloys of _______, __________ and other elements.

To be classified as a stainless steel, a steel must:

__________ is the spontaneous formation of a hard non-reactive surface film that inhibits further corrosion.

Chromium based stainless steels were originally considered to have poor corrosion resistance because they reacted badly with ___________ _______.

_____________, do not undergo a Crystalline phase change and therefore cannot be ________ ________.

Ferritic SS's should not be used at temperatures above 650°F because they tend to become ______.

The 4 categories of Stainless steels are:

steels containing more than 2% carbon are called ____ _____.

Steel with very high carbon has almost no ________. It can only be cast or machined into the desired shape.

Gray cast iron has little _____ strength, but is very good in _______ applications.

White cast iron is very hard and brittle. It can't be _________ or __________.

Malleable cast iron is a ______ ________ version of white cast iron.

White cast iron is made up of mostly ______.

Non ferrous metals do not contain _______.

__________ is one of the oldest metals known and used by man.

______ is an alloy of copper and tin.

_________ is an alloy of copper and zinc.

What is the purpose of adding alloying metals to copper?

________ is the third most abundant element on the earth, after oxygen and silicon.

What metal is derived primarily from seawater?

__________ ________ are extremely resistant to heat and wear.

________ is used in medical applications for artificial joint replacements.

The greatest use for lead is in _______ _______.

_______ is often used for Galvanizing steels.

___________ is the most biocompatible metal known and has a stiffness similar to that of the human bone.

________ is the lightest of the structural metals and is used in lightweight applications where strength is required.

_________ exists nowhere in nature in a pure form, and is always mixed with other elements. Properties include: corrosion resistance, lightweight, very good conductivity, and high strength-to-weight ratio.

_____________ is known for its high thermal conductivity ( 10 times that of steel) and high electrical conductivity.

Surface engineering as we discussed it refers to altering the surface of a material in order to:

Real surfaces are complex. At magnification they are covered with:

Four major fields of Surface Engineering are:

Surface cleaning can involve:

Surface modification involves:

Surface regeneration requires things like:

Surface coatings involve:

Porosity is:

Particle impingement are processes like:

In ____________, an electrochemical process is used to deposit another metal, like nickel or chrome, on top of a base material.

One problem with electroplating is that it tends to ______ __ on the corners.

____________ _________ is only .0001 to .0002" thick, greatly improves surface hardness and significantly reduces the coefficient of friction.

________ _________ ________  is a process that builds up the coating atom by atom.

Passivation is the __________ transformation of a metal's surface into the passive state, in which corrosion is strongly inhibited.

_________ __________ change the surface layer of the work piece to a different chemical compound.

Conversion coatings are only __________ ______, not corrosion proof.

Some types of conversion coatings are: