the Geese, and Other Fables of Bidpai,_ retold by Maude Barrows Button.] A Tortoise and two Geese lived together in a pond for many years. At last there came a drought and dried up the pond. Then the Geese said to one another,-- "We mu... Read more of THE TORTOISE AND THE GEESE at Children Stories.caInformational Site Network Informational
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Steel Making

Heat Treatment Of Steel
Heat treatment consists in heating and cooling metal at defin...

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

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

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

Composition And Properties Of Steel
It is a remarkable fact that one can look through a dozen tex...

Effect Of Different Carburizing Material
[Illustrations: FIGS. 33 to 37.] Each of these different p...

The Quenching Tank
The quenching tank is an important feature of apparatus in c...

Carburizing Low-carbon Sleeves
Low-carbon sleeves are carburized and pushed on malleable-ir...

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

Knowing What Takes Place
How are we to know if we have given a piece of steel the ver...

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

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

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

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

Steel Can Be Worked Cold
As noted above, steel can be worked cold, as in the case of ...

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

Chromium when alloyed with steel, has the characteristic func...

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

An Automatic Temperature Control Pyrometer
Automatic temperature control instruments are similar to the ...

The Effect Of Tempering On Water-quenched Gages
The following information has been supplied by Automatic and ...

Properties Of Steel


Steels are known by certain tests. Early tests were more or less
crude, and depended upon the ability of the workman to judge the
grain exhibited by a freshly broken piece of steel. The cold-bend
test was also very useful--a small bar was bent flat upon itself,
and the stretched fibers examined for any sign of break. Harder
stiff steels were supported at the ends and the amount of central
load they would support before fracture, or the amount of permanent
set they would acquire at a given load noted. Files were also used
to test the hardness of very hard steel.

These tests are still used to a considerable extent, especially in
works where the progress of an operation can be kept under close
watch in this way, the product being periodically examined by more
precise methods. The chief furnace-man, or melter, in a steel
plant, judges the course of the refining process by casting small
test ingots from time to time, breaking them and examining the
fracture. Cutlery manufacturers use the bend test to judge the
temper of blades. File testing of case-hardened parts is very common.

However there is need of standardized methods which depend less
upon the individual skill of the operator, and which will yield
results comparable to others made by different men at different
places and on different steels. Hence has grown up the art of testing

Next: Tensile Properties

Previous: Alloying Elements

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