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Separating The Work From The Compound
During the pulling of the heat, the pots are dumped upon a ca...

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

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

Carburizing Low-carbon Sleeves
Low-carbon sleeves are carburized and pushed on malleable-ir...

Cyanide Bath For Tool Steels
All high-carbon tool steels are heated in a cyanide bath. Wi...

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

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

The Electric Process
The fourth method of manufacturing steel is by the electric f...

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

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

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

Annealing Method
Forgings which are too hard to machine are put in pots with ...

Heat-treating Equipment And Methods For Mass Production
The heat-treating department of the Brown-Lipe-Chapin Company...

Quenching The Work
In some operations case-hardened work is quenched from the bo...

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

Hardening High-speed Steels
We will now take up the matter of hardening high-speed steels...

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

Bessemer Process
The bessemer process consists of charging molten pig iron int...

Sulphur
Sulphur is another impurity and high sulphur is even a greate...

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



Carbon Steels For Different Tools






Category: HARDENING CARBON STEEL FOR TOOLS

All users of tool steels should carefully study the different qualities
of the steels they handle. Different uses requires different kinds of
steel for best results, and for the purpose of designating different
steels some makers have adopted the two terms temper, and quality,
to distinguish between them.

In this case temper refers to the amount of carbon which is combined
with the iron to make the metal into a steel. The quality means
the absence of phosphorous, sulphur and other impurities, these
depending on the ores and the methods of treatment.

Steel makers have various ways of designating carbon steels for
different purposes. Some of these systems involve the use of numbers,
that of the Latrobe Steel Company being given herewith. It will
be noted that the numbers are based on 20 points of carbon per
unit. The names given the different tempers are also of interest.
Other makers use different numbers.

The temper list follows:

LATROBE TEMPER LIST OF CARBON TOOL STEELS
No. 3 temper 0.60 to 0.69 per cent carbon
No. 3-1/2 temper 0.70 to 0.79 per cent carbon
No. 4 temper 0.80 to 0.89 per cent carbon
No. 4-1/2 temper 0.90 to 0.99 pet cent carbon
No. 5 temper 1.00 to 1.09 per cent carbon
No. 5-1/2 temper 1.10 to 1.19 per cent carbon
No. 6 temper 1.20 to 1.29 per cent carbon
No. 6-1/2 temper 1.30 to 1.39 per cent carbon
No. 7 temper 1.40 to 1.49 per cent carbon





Next: Uses Of The Various Tempers Of Carbon Tool Steel

Previous: Carbon In Tool Steel



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