The northern half of Ireland has not proved as prolific in stories of haunted houses as the southern portion: the possible explanation of this is, not that the men of the north are less prone to hold, or talk about, such beliefs, but that, as... Read more of Haunted Houses In Mogh's Half at Scary Stories.caInformational Site Network Informational
   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

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

Temperature Recording And Regulation
Each furnace is equipped with pyrometers, but the reading an...

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

Take Time For Hardening
Uneven heating and poor quenching has caused loss of many ve...

Ebbw Vale And The Bessemer Process
After his British Association address in August 1856, Besseme...

Pyrometers For Molten Metal
Pyrometers for molten metal are connected to portable thermoc...

Protectors For Thermo-couples
Thermo-couples must be protected from the danger of mechanica...

Silicon prevents, to a large extent, defects such as gas bubb...

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

Instructions For Working High-speed Steel
Owing to the wide variations in the composition of high-speed...

Steel Before The 1850's
In spite of a rapid increase in the use of machines and the ...

Non-shrinking Oil-hardening Steels
Certain steels have a very low rate of expansion and contract...

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

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

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

Application To The Automotive Industry
The information given on the various parts of the Liberty eng...

The Theory Of Tempering
Steel that has been hardened is generally harder and more br...

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

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

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

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 4599