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Sulphur
SULPHUR is another element (symbol S) which is always found i...

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

Heavy Forging Practice
In heavy forging practice where the metal is being worked at...

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

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

Critical Points
One of the most important means of investigating the properti...

Care In Annealing
Not only will benefits in machining be found by careful anne...

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

The Packing Department
In Fig. 56 is shown the packing pots where the work is packe...

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

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

Affinity Of Nickel Steel For Carbon
The carbon- and nickel-steel gears are carburized separately...

Protective Screens For Furnaces
Workmen needlessly exposed to the flames, heat and glare from...

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...

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

Chromium
Chromium when alloyed with steel, has the characteristic func...

Carbon In Tool Steel
Carbon tool steel, or tool steel as it is commonly called, us...

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

The Theory Of Tempering
Steel that has been hardened is generally harder and more br...

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



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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