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Instructions For Working High-speed Steel
Owing to the wide variations in the composition of high-speed...

Furnace Data
In order to give definite information concerning furnaces, fu...

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

Manganese
MANGANESE is a metal much like iron. Its chemical symbol is M...

Temperatures To Use
As soon as the temperature of the steel reaches 100 deg.C. (...

Robert Mushet
Robert (Forester) Mushet (1811-1891), born in the Forest of D...

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

Heat-treating Department
The heat-treating department occupies an L-shaped building. ...

Steel For Chisels And Punches
The highest grades of carbon or tempering steels are to be re...

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

Phosphorus
PHOSPHORUS is an element (symbol P) which enters the metal fr...

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

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

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

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

Compensating Leads
By the use of compensating leads, formed of the same materia...

Short Method Of Treatment
In the new method, the packed pots are run into the case-har...

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

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

Connecting Rods
The material used for all connecting rods on the Liberty engi...



Temperature For Annealing






Category: HEAT TREATMENT OF STEEL

Theoretically, annealing should be
accomplished at a temperature at just slightly above the critical
point. However, in practice the temperature is raised to a higher
point in order to allow for the solution of the carbon and iron to
be produced more rapidly, as the time required to produce complete
solution is reduced as the temperature increases past the critical
point.

For annealing the simpler types of low-carbon steels the following
temperatures have been found to produce uniform machining conditions
on account of producing uniform fine-grain pearlite structure:

0.15 to 0.25 per cent carbon, straight carbon steel.--Heat to 1,650 deg.F.
Hold at this temperature until the work is uniformly heated; pull
from the furnace and cool in air.

0.15 to 0.25 per cent carbon, 1-1/2 per cent nickel, 1/2 per cent
chromium steel.--Heat to 1,600 deg.F. Hold at this temperature until
the work is uniformly heated; pull from the furnace and cool in air.

0.15 to 0.25 per cent carbon, 3-1/2 per cent nickel steel.--Heat
to 1,575 deg.F. Hold at this temperature until the work is uniformly
heated; pull from the furnace and cool in air.





Next: Care In Annealing

Previous: Effects Of Proper Annealing



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