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   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

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

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

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

Drop Forging Dies
The kind of steel used in the die of course influences the he...

Highly Stressed Parts
The highly stressed parts on the Liberty engine consisted of ...

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

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

Heat Treatment Of Axles
Parts of this general type should be heat-treated to show the...

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

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

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

The Influence Of Size
The size of the piece influences the physical properties obta...

Annealing Of Rifle Components At Springfield Armory
In general, all forgings of the components of the arms manufa...

Heating Of Manganese Steel
Another form of heat-treating furnace is that which is used ...

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

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

Hardening High-speed Steels
We will now take up the matter of hardening high-speed steels...

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

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

Heat Treatment Of Punches And Dies Shears Taps Etc
HEATING.--The degree to which tools of the above classes shou...



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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