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Crankshaft
The crankshaft was the most highly stressed part of the entir...

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

Hardening Carbon Steel For Tools
For years the toolmaker had full sway in regard to make of st...

Carbon Steels For Different Tools
All users of tool steels should carefully study the different...

The Influence Of Size
The size of the piece influences the physical properties obta...

Using Illuminating Gas
The choice of a carburizing furnace depends greatly on the fa...

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

The Thermo-couple
With the application of the thermo-couple, the measurement of...

Application Of Liberty Engine Materials To The Automotive Industry
The success of the Liberty engine program was an engineer...

Preventing Carburizing By Copper-plating
Copper-plating has been found effective and must have a thick...

Judging The Heat Of Steel
While the use of a pyrometer is of course the only way to hav...

Heat Treatment Of Axles
Parts of this general type should be heat-treated to show the...

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

Bessemer Process
The bessemer process consists of charging molten pig iron int...

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

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

Annealing Of High-speed Steel
For annealing high-speed steel, some makers recommend using g...

The Care Of Carburizing Compounds
Of all the opportunities for practicing economy in the heat-t...

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

Hardening
The forgings can be hardened by cooling in still air or quen...



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.





Next: High-chromium Or Rust-proof Steel

Previous: Non-shrinking Oil-hardening Steels



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