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Steel Making

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

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

High Speed Steel
For centuries the secret art of making tool steel was handed ...

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

Cyanide Bath For Tool Steels
All high-carbon tool steels are heated in a cyanide bath. Wi...

Piston Pin
The piston pin on an aviation engine must possess maximum res...

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

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

Annealing
ANNEALING can be done by heating to temperatures ranging from...

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

A Chromium-cobalt Steel
The Latrobe Steel Company make a high-speed steel without tun...

Hardening Carbon Steel For Tools
For years the toolmaker had full sway in regard to make of st...

The Electric Process
The fourth method of manufacturing steel is by the electric f...

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

Hints For Tool Steel Users
Do not hesitate to ask for information from the maker as to t...

Classifications Of Steel
Among makers and sellers, carbon tool-steels are classed by g...

Pyrometers
Armor plate makers sometimes use the copper ball or Siemens' ...

Flange Shields For Furnaces
Such portable flame shields as the one illustrated in Fig. 1...

Carburizing By Gas
The process of carburizing by gas, briefly mentioned on page ...

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



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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