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Heavy Forging Practice
In heavy forging practice where the metal is being worked at...

The Penetration Of Carbon
Carburized mild steel is used to a great extent in the manufa...

The Effect Of Tempering On Water-quenched Gages
The following information has been supplied by Automatic and ...

Plant For Forging Rifle Barrels
The forging of rifle barrels in large quantities and heat-tre...

Quality And Structure
The quality of high-speed steel is dependent to a very great ...

Annealing To Relieve Internal Stresses
Work quenched from a high temperature and not afterward tempe...

Critical Points
One of the most important means of investigating the properti...

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

Tensile Properties
Strength of a metal is usually expressed in the number of pou...

Pyrometers
Armor plate makers sometimes use the copper ball or Siemens' ...

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

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

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

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

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

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

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...

Heating Of Manganese Steel
Another form of heat-treating furnace is that which is used ...

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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