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Quenching Tool Steel
To secure proper hardness, the cooling of quenching of steel ...

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

Cutting-off Steel From Bar
To cut a piece from an annealed bar, cut off with a hack saw,...

Preventing Cracks In Hardening
The blacksmith in the small shop, where equipment is usually ...

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

Cyanide Bath For Tool Steels
All high-carbon tool steels are heated in a cyanide bath. Wi...

Bessemer Process
The bessemer process consists of charging molten pig iron int...

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

Heat-treating Equipment And Methods For Mass Production
The heat-treating department of the Brown-Lipe-Chapin Company...

Silicon
Silicon prevents, to a large extent, defects such as gas bubb...

Oil-hardening Steel
Heat slowly and uniformly to 1,450 deg.F. and forge thorough...

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

William Kelly's Air-boiling Process
An account of Bessemer's address to the British Association w...

Hints For Tool Steel Users
Do not hesitate to ask for information from the maker as to t...

Heat Treatment Of Steel
Heat treatment consists in heating and cooling metal at defin...

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

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

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

Placing The Thermo-couples
The following illustrations from the Taylor Instrument Compan...

A Satisfactory Luting Mixture
A mixture of fireclay and sand will be found very satisfactor...



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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