- Learn about weather from a world and scentific point of view. Extreme storms, mild rain, blisting sun and whipping wind are all elements of weather. Discover how they work. Visit Fogs.caInformational Site Network Informational
   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

Chrome-nickel Steel
Forging heat of chrome-nickel steel depends very largely on ...

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

Rate Of Cooling
At the option of the manufacturer, the above treatment of gea...

Compensating Leads
By the use of compensating leads, formed of the same materia...

Fatigue Tests
It has been known for fifty years that a beam or rod would fa...

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

Tungsten, as an alloy in steel, has been known and used for a...

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

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

Introduction Of Carbon
The matter to which these notes are primarily directed is the...

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

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

Steel is hardened by quenching from above the upper critical....

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

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

Placing The Thermo-couples
The following illustrations from the Taylor Instrument Compan...

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

SULPHUR is another element (symbol S) which is always found i...

Critical Points
One of the most important means of investigating the properti...

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

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

Add to Add to Reddit Add to Digg Add to Add to Google Add to Twitter Add to Stumble Upon
Add to Informational Site Network

Viewed 4858