The Mdewakantonwan were so called from their former habitat, Mdewakan, or Mysterious lake, commonly called Spirit lake, one of the Mille Lacs in Minnesota. The whole name means Mysterious Lake village, and the term was used by De l'Isle as ea... Read more of The Mdewakantonwan at Siouan.caInformational Site Network Informational
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Steel Making

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

Hardening
Steel is hardened by quenching from above the upper critical....

Typical Oil-fired Furnaces
Several types of standard oil-fired furnaces are shown herew...

Phosphorus
Phosphorus is one of the impurities in steel, and it has been...

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

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

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

Preparing Parts For Local Case-hardening
At the works of the Dayton Engineering Laboratories Company, ...

Phosphorus
PHOSPHORUS is an element (symbol P) which enters the metal fr...

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

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

Blending The Compound
Essentially, this consists of the sturdy, power-driven separa...

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

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

Hardening Operation
Hardening a gear is accomplished as follows: The gear is tak...

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

Temperatures To Use
As soon as the temperature of the steel reaches 100 deg.C. (...

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

High Speed Steel
For centuries the secret art of making tool steel was handed ...

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



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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