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Steel Making

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

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

Silicon
SILICON is a very widespread element (symbol Si), being an es...

Machineability
Reheating for machine ability was done at 100 deg. less than ...

Annealing Work
With the exception of several of the higher types of alloy s...

Flange Shields For Furnaces
Such portable flame shields as the one illustrated in Fig. 1...

Pickling The Forgings
The forgings were then pickled in a hot solution of either ni...

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

Carbon-steel Forgings
Low-stressed, carbon-steel forgings include such parts as car...

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

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

Heat Treatment Of Milling Cutters Drills Reamers Etc
THE FIRE.--Gas and electric furnaces designed for high heats ...

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

Complete Calibration Of Pyrometers
For the complete calibration of a thermo-couple of unknown e...

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

Hardening High-speed Steel
In forging use coke for fuel in the forge. Heat steel slowly ...

Using Illuminating Gas
The choice of a carburizing furnace depends greatly on the fa...

Brown Automatic Signaling Pyrometer
In large heat-treating plants it has been customary to mainta...

Leeds And Northrup Optical Pyrometer
The principles of this very popular method of measuring tempe...

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



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.





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Previous: Sulphur



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