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

Compensating Leads
By the use of compensating leads, formed of the same materia...

Care In Annealing
Not only will benefits in machining be found by careful anne...

Gears
The material used for all gears on the Liberty engine was sel...

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

Non-shrinking Oil-hardening Steels
Certain steels have a very low rate of expansion and contract...

Vanadium
Vanadium has a very marked effect upon alloy steels rich in c...

Heat Treatment Of Milling Cutters Drills Reamers Etc
THE FIRE.--Gas and electric furnaces designed for high heats ...

Brown Automatic Signaling Pyrometer
In large heat-treating plants it has been customary to mainta...

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

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

Chromium
Chromium when alloyed with steel, has the characteristic func...

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

Steel Worked In Austenitic State
As a general rule steel should be worked when it is in the a...

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

Carburizing By Gas
The process of carburizing by gas, briefly mentioned on page ...

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...

Annealing Alloy Steel
The term alloy steel, from the steel maker's point of view, r...

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

Preventing Cracks In Hardening
The blacksmith in the small shop, where equipment is usually ...



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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