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   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

An Automatic Temperature Control Pyrometer
Automatic temperature control instruments are similar to the ...

Hardening
Steel is hardened by quenching from above the upper critical....

Uses Of The Various Tempers Of Carbon Tool Steel
DIE TEMPER.--No. 3: All kinds of dies for deep stamping, pres...

Annealing
ANNEALING can be done by heating to temperatures ranging from...

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

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

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

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

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

Gas Consumption For Carburizing
Although the advantages offered by the gas-fired furnace for ...

Silicon
Silicon prevents, to a large extent, defects such as gas bubb...

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

Hardness Testing
The word hardness is used to express various properties of me...

Fatigue Tests
It has been known for fifty years that a beam or rod would fa...

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

Vanadium
Vanadium has a very marked effect upon alloy steels rich in c...

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

Carburizing Material
The simplest carburizing substance is charcoal. It is also th...

Temperature Recording And Regulation
Each furnace is equipped with pyrometers, but the reading an...

Case-hardening Treatments For Various Steels
Plain water, salt water and linseed oil are the three most co...



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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