Out in the sky the great dark clouds are massing; I look far out into the pregnant night, Where I can hear a solemn booming gun And catch the gleaming of a random light, That tells me that the ship I seek is passing, passing. My tear... Read more of Ships That Pass In The Night at Martin Luther King.caInformational Site Network Informational
Privacy
   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

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

The Forging Of Steel
So much depends upon the forging of steel that this operation...

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

Tempering Colors On Carbon Steels
Opinions differ as to the temperature which is indicated by t...

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

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

An Automatic Temperature Control Pyrometer
Automatic temperature control instruments are similar to the ...

A Satisfactory Luting Mixture
A mixture of fireclay and sand will be found very satisfactor...

Temperature Recording And Regulation
Each furnace is equipped with pyrometers, but the reading an...

Standard Analysis
The selection of a standard analysis by the manufacturer is t...

Restoring Overheated Steel
The effect of heat treatment on overheated steel is shown gra...

Placing The Thermo-couples
The following illustrations from the Taylor Instrument Compan...

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

Fatigue Tests
It has been known for fifty years that a beam or rod would fa...

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

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

Correction For Cold-junction Errors
The voltage generated by a thermo-couple of an electric pyrom...

Knowing What Takes Place
How are we to know if we have given a piece of steel the ver...

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

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



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



Add to del.icio.us Add to Reddit Add to Digg Add to Del.icio.us Add to Google Add to Twitter Add to Stumble Upon
Add to Informational Site Network
Report
Privacy
SHAREADD TO EBOOK


Viewed 3551