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S A E Heat Treatments
The Society of Automotive Engineers have adopted certain heat...

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

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

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

Preventing Decarbonization Of Tool Steel
It is especially important to prevent decarbonization in such...

Tempering Round Dies
A number of circular dies of carbon tool steel for use in too...

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

Preparing Parts For Local Case-hardening
At the works of the Dayton Engineering Laboratories Company, ...

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

Tensile Properties
Strength of a metal is usually expressed in the number of pou...

Hardening Operation
Hardening a gear is accomplished as follows: The gear is tak...

The Thermo-couple
With the application of the thermo-couple, the measurement of...

Pyrometers
Armor plate makers sometimes use the copper ball or Siemens' ...

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

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

Heat Treatment Of Lathe Planer And Similar Tools
FIRE.--For these tools a good fire is one made of hard foundr...

Steel Worked In Austenitic State
As a general rule steel should be worked when it is in the a...

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

The Pyrometer And Its Use
In the heat treatment of steel, it has become absolutely nece...

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



Phosphorus






Category: COMPOSITION AND PROPERTIES OF STEEL

PHOSPHORUS is an element (symbol P) which enters the metal from
the ore. It remains in the steel when made by the so-called acid
process, but it can be easily eliminated down to 0.06 per cent
in the basic process. In fact the discovery of the basic process
was necessary before the huge iron deposits of Belgium and the
Franco-German border could be used. These ores contain several
per cent phosphorus, and made a very brittle steel (cold short)
until basic furnaces were used. Basic furnaces allow the formation
of a slag high in lime, which takes practically all the phosphorus
out of the metal. Not only is the resulting metal usable, but the
slag makes a very excellent fertilizer, and is in good demand.





Next: Silicon

Previous: Sulphur



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