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

The Thermo-couple
With the application of the thermo-couple, the measurement of...

Quenching
It is considered good practice to quench alloy steels from th...

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

Take Time For Hardening
Uneven heating and poor quenching has caused loss of many ve...

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

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

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...

Plant For Forging Rifle Barrels
The forging of rifle barrels in large quantities and heat-tre...

Steel Can Be Worked Cold
As noted above, steel can be worked cold, as in the case of ...

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

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

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

Annealing Of High-speed Steel
For annealing high-speed steel, some makers recommend using g...

Mushet And Bessemer
That Mushet was "used" by Ebbw Vale against Bessemer is, perh...

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

Heat Treatment Of Axles
Parts of this general type should be heat-treated to show the...

Calibration Of Pyrometer With Common Salt
An easy and convenient method for standardization and one whi...

Piston Pin
The piston pin on an aviation engine must possess maximum res...

The Modern Hardening Room
A hardening room of today means a very different place from ...



Annealing






Category: ALLOYS AND THEIR EFFECT UPON STEEL

ANNEALING can be done by heating to temperatures ranging from 1,290
to 1,380 deg.F. and cooling in air or quenching in water or oil. After
this treatment the forgings will have a hardness of about 200 Brinell
and a tensile strength of 100,000 to 112,000 lb. per square inch.
If softer forgings are desired they can be heated to a temperature
of from 1,560 to 1,650 deg.F. and cooled very slowly. Although softer
the forgings will not machine as smoothly as when annealed at the
lower temperature.





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