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The Pyrometer And Its Use
In the heat treatment of steel, it has become absolutely nece...

S A E Heat Treatments
The Society of Automotive Engineers have adopted certain heat...

Hardening
The forgings can be hardened by cooling in still air or quen...

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

Carbon Steels For Different Tools
All users of tool steels should carefully study the different...

Mushet And Bessemer
That Mushet was "used" by Ebbw Vale against Bessemer is, perh...

Carbon-steel Forgings
Low-stressed, carbon-steel forgings include such parts as car...

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

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

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

Annealing Work
With the exception of several of the higher types of alloy s...

Pyrometers For Molten Metal
Pyrometers for molten metal are connected to portable thermoc...

Lathe And Planer Tools
TO FORGE.--Gently warm the steel to remove any chill is parti...

Silicon
SILICON is a very widespread element (symbol Si), being an es...

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

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

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...

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

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

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



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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