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Tungsten
Tungsten, as an alloy in steel, has been known and used for a...

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

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

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

A Satisfactory Luting Mixture
A mixture of fireclay and sand will be found very satisfactor...

Phosphorus
PHOSPHORUS is an element (symbol P) which enters the metal fr...

Heat Treatment Of Axles
Parts of this general type should be heat-treated to show the...

Process Of Carburizing
Carburizing imparts a shell of high-carbon content to a low-...

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

Liberty Motor Connecting Rods
The requirements for materials for the Liberty motor connecti...

Molybdenum
Molybdenum steels have been made commercially for twenty-five...

Gas Consumption For Carburizing
Although the advantages offered by the gas-fired furnace for ...

The Leeds And Northrup Potentiometer System
The potentiometer pyrometer system is both flexible and subst...

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

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

Knowing What Takes Place
How are we to know if we have given a piece of steel the ver...

Tool Or Crucible Steel
Crucible steel can be annealed either in muffled furnace or b...

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

Crankshaft
The crankshaft was the most highly stressed part of the entir...

Quenching The Work
In some operations case-hardened work is quenched from the bo...



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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