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Steel Making

Heat Treatment Of Steel
Heat treatment consists in heating and cooling metal at defin...

Annealing Work
With the exception of several of the higher types of alloy s...

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

Hints For Tool Steel Users
Do not hesitate to ask for information from the maker as to t...

Surface Carburizing
Carburizing, commonly called case-hardening, is the art of pr...

Hardening Carbon Steel For Tools
For years the toolmaker had full sway in regard to make of st...

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

Nickel-chromium
A combination of the characteristics of nickel and the charac...

Annealing
There is no mystery or secret about the proper annealing of d...

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

Quality And Structure
The quality of high-speed steel is dependent to a very great ...

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

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

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

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

Impact Tests
Impact tests are of considerable importance as an indication ...

Temperature For Annealing
Theoretically, annealing should be accomplished at a tempera...

Gas Consumption For Carburizing
Although the advantages offered by the gas-fired furnace for ...

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

The Effect Of Tempering On Water-quenched Gages
The following information has been supplied by Automatic and ...



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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