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Care In Annealing
Not only will benefits in machining be found by careful anne...

Connecting Rods
The material used for all connecting rods on the Liberty engi...

Optical System And Electrical Circuit Of The Leeds & Northrup Optical Pyrometer
For extremely high temperature, the optical pyrometer is lar...

Highly Stressed Parts
The highly stressed parts on the Liberty engine consisted of ...

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

Annealing Of Rifle Components At Springfield Armory
In general, all forgings of the components of the arms manufa...

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

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

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

The Theory Of Tempering
Steel that has been hardened is generally harder and more br...

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

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

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

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

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

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

Piston Pin
The piston pin on an aviation engine must possess maximum res...

Testing And Inspection Of Heat Treatment
The hard parts of the gear must be so hard that a new mill f...

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

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



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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