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Uses Of The Various Tempers Of Carbon Tool Steel
DIE TEMPER.--No. 3: All kinds of dies for deep stamping, pres...

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

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

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

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

Effects Of Proper Annealing
Proper annealing of low-carbon steels causes a complete solu...

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

Machineability
Reheating for machine ability was done at 100 deg. less than ...

Protective Screens For Furnaces
Workmen needlessly exposed to the flames, heat and glare from...

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

Corrosion
This steel like any other steel when distorted by cold worki...

Tempering Colors On Carbon Steels
Opinions differ as to the temperature which is indicated by t...

Short Method Of Treatment
In the new method, the packed pots are run into the case-har...

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

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

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

Double Annealing
Water annealing consists in heating the piece, allowing it to...

Judging The Heat Of Steel
While the use of a pyrometer is of course the only way to hav...

Correction For Cold-junction Errors
The voltage generated by a thermo-couple of an electric pyrom...

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



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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