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Steel Making

Tungsten
Tungsten, as an alloy in steel, has been known and used for a...

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

Liberty Motor Connecting Rods
The requirements for materials for the Liberty motor connecti...

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

Conclusions
Martien was probably never a serious contender for the honor ...

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

Properties Of Steel
Steels are known by certain tests. Early tests were more or l...

Pyrometry And Pyrometers
A knowledge of the fundamental principles of pyrometry, or th...

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

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

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

Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...

Machineability
Reheating for machine ability was done at 100 deg. less than ...

Crankshaft
The crankshaft was the most highly stressed part of the entir...

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

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...

The Care Of Carburizing Compounds
Of all the opportunities for practicing economy in the heat-t...

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

Preventing Carburizing By Copper-plating
Copper-plating has been found effective and must have a thick...

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



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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