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

Steel Making

Nickel-chromium
A combination of the characteristics of nickel and the charac...

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

Detrimental Elements
Sulphur and phosphorus are two elements known to be detrimen...

Open Hearth Process
The open hearth furnace consists of a big brick room with a l...

Typical Oil-fired Furnaces
Several types of standard oil-fired furnaces are shown herew...

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

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

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

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

Carburizing By Gas
The process of carburizing by gas, briefly mentioned on page ...

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

Annealing
ANNEALING can be done by heating to temperatures ranging from...

Impact Tests
Impact tests are of considerable importance as an indication ...

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

Quality And Structure
The quality of high-speed steel is dependent to a very great ...

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

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

Hardening Carbon Steel For Tools
For years the toolmaker had full sway in regard to make of st...

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

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



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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