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

Steel Making

Surface Carburizing
Carburizing, commonly called case-hardening, is the art of pr...

The Influence Of Size
The size of the piece influences the physical properties obta...

Complete Calibration Of Pyrometers
For the complete calibration of a thermo-couple of unknown e...

The Packing Department
In Fig. 56 is shown the packing pots where the work is packe...

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

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

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

Compensating Leads
By the use of compensating leads, formed of the same materia...

Care In Annealing
Not only will benefits in machining be found by careful anne...

An Automatic Temperature Control Pyrometer
Automatic temperature control instruments are similar to the ...

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

Composition And Properties Of Steel
It is a remarkable fact that one can look through a dozen tex...

Carbon Tool Steel
Heat to a bright red, about 1,500 to 1,550 deg.F. Do not ham...

Hardening High-speed Steels
We will now take up the matter of hardening high-speed steels...

Temperature For Annealing
Theoretically, annealing should be accomplished at a tempera...

Correction For Cold-junction Errors
The voltage generated by a thermo-couple of an electric pyrom...

Blending The Compound
Essentially, this consists of the sturdy, power-driven separa...

Standard Analysis
The selection of a standard analysis by the manufacturer is t...

Tempering Round Dies
A number of circular dies of carbon tool steel for use in too...

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



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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