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Steel Making

Testing And Inspection Of Heat Treatment
The hard parts of the gear must be so hard that a new mill f...

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

Heating
Although it is possible to work steels cold, to an extent de...

Carbon Tool Steel
Heat to a bright red, about 1,500 to 1,550 deg.F. Do not ham...

Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...

Standard Analysis
The selection of a standard analysis by the manufacturer is t...

Connecting Rods
The material used for all connecting rods on the Liberty engi...

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

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

Case-hardening Treatments For Various Steels
Plain water, salt water and linseed oil are the three most co...

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

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

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

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

Annealing
There is no mystery or secret about the proper annealing of d...

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

Annealing Alloy Steel
The term alloy steel, from the steel maker's point of view, r...

Carbon In Tool Steel
Carbon tool steel, or tool steel as it is commonly called, us...

Tool Or Crucible Steel
Crucible steel can be annealed either in muffled furnace or b...

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



Properties Of Steel






Category: COMPOSITION 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
materials.





Next: Tensile Properties

Previous: Alloying Elements



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