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Steel Making

The Effect
The heating at 1,600 deg.F. gives the first heat treatment w...

Steel For Chisels And Punches
The highest grades of carbon or tempering steels are to be re...

Non-shrinking Oil-hardening Steels
Certain steels have a very low rate of expansion and contract...

Suggestions For Handling High-speed Steels
The following suggestions for handling high-speed steels are ...

Quenching
It is considered good practice to quench alloy steels from th...

Steel Can Be Worked Cold
As noted above, steel can be worked cold, as in the case of ...

Hardening Operation
Hardening a gear is accomplished as follows: The gear is tak...

Manganese
MANGANESE is a metal much like iron. Its chemical symbol is M...

Robert Mushet
Robert (Forester) Mushet (1811-1891), born in the Forest of D...

Carburizing Low-carbon Sleeves
Low-carbon sleeves are carburized and pushed on malleable-ir...

Effect Of A Small Amount Of Copper In Medium-carbon Steel
This shows the result of tests by C. R. Hayward and A. B. Joh...

Highly Stressed Parts
The highly stressed parts on the Liberty engine consisted of ...

Using Illuminating Gas
The choice of a carburizing furnace depends greatly on the fa...

Furnace Data
In order to give definite information concerning furnaces, fu...

Tensile Properties
Strength of a metal is usually expressed in the number of pou...

Hardening
Steel is hardened by quenching from above the upper critical....

Heat Treatment Of Punches And Dies Shears Taps Etc
HEATING.--The degree to which tools of the above classes shou...

Application Of Liberty Engine Materials To The Automotive Industry
The success of the Liberty engine program was an engineer...

Annealing Of Rifle Components At Springfield Armory
In general, all forgings of the components of the arms manufa...

Application To The Automotive Industry
The information given on the various parts of the Liberty eng...



Impact Tests






Category: COMPOSITION AND PROPERTIES OF STEEL

Impact tests are of considerable importance as an indication of
how a metal will perform under shock. Some engineers think that
the tensile test, which is one made under slow loading, should
therefore be supplemented by another showing what will happen if
the load is applied almost instantaneously. This test, however, has
not been standardized, and depends to a considerable extent upon
the type of machine, but more especially the size of the specimen
and the way it is nicked. The machine is generally a swinging
heavy pendulum. It falls a certain height, strikes the sample at
the lowest point, and swings on past. The difference between the
downward and upward swing is a measure of the energy it took to
break the test piece.





Next: Fatigue Tests

Previous: Tensile Properties



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