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Steel Making

Crucible Steel
Crucible steel is still made by melting material in a clay or...

Critical Points
One of the most important means of investigating the properti...

Impact Tests
Impact tests are of considerable importance as an indication ...

Pickling The Forgings
The forgings were then pickled in a hot solution of either ni...

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

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

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

The Forging Of Steel
So much depends upon the forging of steel that this operation...

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

William Kelly's Air-boiling Process
An account of Bessemer's address to the British Association w...

Conclusions
Martien was probably never a serious contender for the honor ...

Rate Of Absorption
According to Guillet, the absorption of carbon is favored by ...

Annealing In Bone
Steel and cast iron may both be annealed in granulated bone. ...

Properties Of Steel
Steels are known by certain tests. Early tests were more or l...

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

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

Steel Before The 1850's
In spite of a rapid increase in the use of machines and the ...

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

Separating The Work From The Compound
During the pulling of the heat, the pots are dumped upon a ca...

Preventing Decarbonization Of Tool Steel
It is especially important to prevent decarbonization in such...



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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