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Steel Making

The Forging Of Steel
So much depends upon the forging of steel that this operation...

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

Hardening High-speed Steel
In forging use coke for fuel in the forge. Heat steel slowly ...

Pyrometry And Pyrometers
A knowledge of the fundamental principles of pyrometry, or th...

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

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

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

William Kelly's Air-boiling Process
An account of Bessemer's address to the British Association w...

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

Protectors For Thermo-couples
Thermo-couples must be protected from the danger of mechanica...

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

Blending The Compound
Essentially, this consists of the sturdy, power-driven separa...

High-carbon Machinery Steel
The carbon content of this steel is above 30 points and is ha...

High-chromium Or Rust-proof Steel
High-chromium, or what is called stainless steel containing f...

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

Furnace Data
In order to give definite information concerning furnaces, fu...

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

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

Flange Shields For Furnaces
Such portable flame shields as the one illustrated in Fig. 1...

Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...



Impact Tests






Category: COMPOSITION AND PROPERTIES OF STEEL

Impact tests are of considerable importance as an indication of
how a metal will perform under shock. Some engineers think that
the tensile test, which is one made under slow loading, should
therefore be supplemented by another showing what will happen if
the load is applied almost instantaneously. This test, however, has
not been standardized, and depends to a considerable extent upon
the type of machine, but more especially the size of the specimen
and the way it is nicked. The machine is generally a swinging
heavy pendulum. It falls a certain height, strikes the sample at
the lowest point, and swings on past. The difference between the
downward and upward swing is a measure of the energy it took to
break the test piece.





Next: Fatigue Tests

Previous: Tensile Properties



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