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Effect Of A Small Amount Of Copper In Medium-carbon Steel
This shows the result of tests by C. R. Hayward and A. B. Joh...

Lathe And Planer Tools
FORGING.--Gently warm the steel to remove any chill, is parti...

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

Fatigue Tests
It has been known for fifty years that a beam or rod would fa...

Crucible Steel
Crucible steel is still made by melting material in a clay or...

Temperature Recording And Regulation
Each furnace is equipped with pyrometers, but the reading an...

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

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

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

Annealing To Relieve Internal Stresses
Work quenched from a high temperature and not afterward tempe...

Carbon Tool Steel
Heat to a bright red, about 1,500 to 1,550 deg.F. Do not ham...

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

Hardening
Steel is hardened by quenching from above the upper critical....

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

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

Gas Consumption For Carburizing
Although the advantages offered by the gas-fired furnace for ...

High-chromium Or Rust-proof Steel
High-chromium, or what is called stainless steel containing f...

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

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

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



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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