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

Drop Forging Dies
The kind of steel used in the die of course influences the he...

Heating
Although it is possible to work steels cold, to an extent de...

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

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

S A E Heat Treatments
The Society of Automotive Engineers have adopted certain heat...

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

Classifications Of Steel
Among makers and sellers, carbon tool-steels are classed by g...

Hardening
The forgings can be hardened by cooling in still air or quen...

Annealing Of Rifle Components At Springfield Armory
In general, all forgings of the components of the arms manufa...

Heating Of Manganese Steel
Another form of heat-treating furnace is that which is used ...

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

An Automatic Temperature Control Pyrometer
Automatic temperature control instruments are similar to the ...

High-carbon Machinery Steel
The carbon content of this steel is above 30 points and is ha...

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

Rate Of Absorption
According to Guillet, the absorption of carbon is favored by ...

Restoring Overheated Steel
The effect of heat treatment on overheated steel is shown gra...

Air-hardening Steels
These steels are recommended for boring, turning and planing...

Properties Of Alloy Steels
The following table shows the percentages of carbon, manganes...

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



Annealing Alloy Steel






Category: ANNEALING

The term alloy steel, from the steel maker's point of view, refers
largely to nickel and chromium steel or a combination of both. These
steels are manufactured very largely by the open-hearth process,
although chromium steels are also a crucible product. It is next
to impossible to give proper directions for the proper annealing
of alloy steel unless the composition is known to the operator.

Nickel steels may be annealed at lower temperatures than carbon
steels, depending upon their alloy content. For instance, if a
pearlitic carbon steel may be annealed at 1,450 deg.C., the same analysis
containing 2-1/2 per cent nickel may be annealed at 1,360 deg.C. and
a 5 per cent nickel steel at 1,270 deg..

In order that high chromium steels may be readily machined, they
must be heated at or slightly above the critical for a very long
time, and cooled through the critical at an extremely slow rate.
For a steel containing 0.9 to 1.1 per cent carbon, under 0.50 per
cent manganese, and about 1.0 per cent chromium, Bullens recommends
the following anneal:

1. Heat to 1,700 or 1,750 deg.F.
2. Air cool to about 800 deg.F.
3. Soak at 1,425 to 1,450 deg.F.
4. Cool slowly in furnace.





Next: High-carbon Machinery Steel

Previous: Tool Or Crucible Steel



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