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Heat Treatment Of Lathe Planer And Similar Tools
FIRE.--For these tools a good fire is one made of hard foundr...

Crucible Steel
Crucible steel is still made by melting material in a clay or...

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

Carburizing Material
The simplest carburizing substance is charcoal. It is also th...

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

Tempering Round Dies
A number of circular dies of carbon tool steel for use in too...

Heat Treatment Of Gear Blanks
This section is based on a paper read before the American Gea...

Ebbw Vale And The Bessemer Process
After his British Association address in August 1856, Besseme...

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

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

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

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

Introduction Of Carbon
The matter to which these notes are primarily directed is the...

Placing Of Pyrometers
When installing a pyrometer, care should be taken that it re...

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

Correction By Zero Adjustment
Many pyrometers are supplied with a zero adjuster, by means ...

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

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

Heating
Although it is possible to work steels cold, to an extent de...

Molybdenum
Molybdenum steels have been made commercially for twenty-five...



Effect Of A Small Amount Of Copper In Medium-carbon Steel






Category: ALLOYS AND THEIR EFFECT UPON STEEL

This shows the result of tests by C. R. Hayward and A. B. Johnston
on two types of steel: one containing 0.30 per cent carbon, 0.012
per cent phosphorus, and 0.860 per cent copper, and the other 0.365
per cent carbon, 0.053 per cent phosphorus, and 0.030 per cent
copper. The accompanying chart in Fig. 13 shows that high-copper
steel has decided superiority in tensile strength, yield point and
ultimate strength, while the ductility is practically the same.
Hardness tests by both methods show high-copper steel to be harder
than low-copper, and the Charpy shock tests show high-copper steel
also superior to low-copper. The tests confirm those made by Stead,
showing that the behavior of copper steel resembles that of nickel
steel. The high-copper steels show finer grain than the low-copper.
The quenched and drawn specimens of high-copper steel were found
to be slightly more martensitic.





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Previous: Non-shrinking Oil-hardening Steels



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