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   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

The Care Of Carburizing Compounds
Of all the opportunities for practicing economy in the heat-t...

Annealing Alloy Steel
The term alloy steel, from the steel maker's point of view, r...

Quenching Tool Steel
To secure proper hardness, the cooling of quenching of steel ...

Refining The Grain
This is remedied by reheating the piece to a temperature slig...

The Theory Of Tempering
Steel that has been hardened is generally harder and more br...

Protectors For Thermo-couples
Thermo-couples must be protected from the danger of mechanica...

Preventing Carburizing By Copper-plating
Copper-plating has been found effective and must have a thick...

Annealing Method
Forgings which are too hard to machine are put in pots with ...

Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...

Temperatures To Use
As soon as the temperature of the steel reaches 100 deg.C. (...

Sulphur
Sulphur is another impurity and high sulphur is even a greate...

The Modern Hardening Room
A hardening room of today means a very different place from ...

Judging The Heat Of Steel
While the use of a pyrometer is of course the only way to hav...

Manganese
Manganese adds considerably to the tensile strength of steel,...

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

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

Heating Of Manganese Steel
Another form of heat-treating furnace is that which is used ...

Heat Treatment Of Steel
Heat treatment consists in heating and cooling metal at defin...

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

Heavy Forging Practice
In heavy forging practice where the metal is being worked at...



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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