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Steel Making

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

Brown Automatic Signaling Pyrometer
In large heat-treating plants it has been customary to mainta...

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

Annealing Of Rifle Components At Springfield Armory
In general, all forgings of the components of the arms manufa...

Correction By Zero Adjustment
Many pyrometers are supplied with a zero adjuster, by means ...

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

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

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

The Penetration Of Carbon
Carburized mild steel is used to a great extent in the manufa...

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

Preventing Carburizing By Copper-plating
Copper-plating has been found effective and must have a thick...

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

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

Hardening High-speed Steel
In forging use coke for fuel in the forge. Heat steel slowly ...

Preventing Cracks In Hardening
The blacksmith in the small shop, where equipment is usually ...

Sulphur
Sulphur is another impurity and high sulphur is even a greate...

Bessemer Process
The bessemer process consists of charging molten pig iron int...

Hardness Testing
The word hardness is used to express various properties of me...

Steel Worked In Austenitic State
As a general rule steel should be worked when it is in the a...

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



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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