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A Chromium-cobalt Steel
The Latrobe Steel Company make a high-speed steel without tun...

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

Robert Mushet
Robert (Forester) Mushet (1811-1891), born in the Forest of D...

Corrosion
This steel like any other steel when distorted by cold worki...

Refining The Grain
This is remedied by reheating the piece to a temperature slig...

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

Effects Of Proper Annealing
Proper annealing of low-carbon steels causes a complete solu...

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

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

Sulphur
SULPHUR is another element (symbol S) which is always found i...

Lathe And Planer Tools
FORGING.--Gently warm the steel to remove any chill, is parti...

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

Heat-treating Department
The heat-treating department occupies an L-shaped building. ...

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

Pyrometers For Molten Metal
Pyrometers for molten metal are connected to portable thermoc...

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

The Pyrometer And Its Use
In the heat treatment of steel, it has become absolutely nece...

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

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

Pyrometry And Pyrometers
A knowledge of the fundamental principles of pyrometry, or th...



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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