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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...

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

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

Calibration Of Pyrometer With Common Salt
An easy and convenient method for standardization and one whi...

Machineability
Reheating for machine ability was done at 100 deg. less than ...

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

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

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

The Leeds And Northrup Potentiometer System
The potentiometer pyrometer system is both flexible and subst...

Rate Of Cooling
At the option of the manufacturer, the above treatment of gea...

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

S A E Heat Treatments
The Society of Automotive Engineers have adopted certain heat...

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

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

Annealing In Bone
Steel and cast iron may both be annealed in granulated bone. ...

For Milling Cutters And Formed Tools
FORGING.--Forge as before.--ANNEALING.--Place the steel in a ...

Drop Forging Dies
The kind of steel used in the die of course influences the he...

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

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

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



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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