VIEW THE MOBILE VERSION of Informational Site Network Informational
   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

Heat Treatment Of Punches And Dies Shears Taps Etc
HEATING.--The degree to which tools of the above classes shou...

Preventing Cracks In Hardening
The blacksmith in the small shop, where equipment is usually ...

The Modern Hardening Room
A hardening room of today means a very different place from ...

Tempering Colors On Carbon Steels
Opinions differ as to the temperature which is indicated by t...

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

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

Manganese adds considerably to the tensile strength of steel,...

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

Placing Of Pyrometers
When installing a pyrometer, care should be taken that it re...

Take Time For Hardening
Uneven heating and poor quenching has caused loss of many ve...

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

Suggestions For Handling High-speed Steels
The following suggestions for handling high-speed steels are ...

MANGANESE is a metal much like iron. Its chemical symbol is M...

SILICON is a very widespread element (symbol Si), being an es...

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

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

PHOSPHORUS is an element (symbol P) which enters the metal fr...

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

The Thermo-couple
With the application of the thermo-couple, the measurement of...

Tool Or Crucible Steel
Crucible steel can be annealed either in muffled furnace or b...

High-carbon Machinery Steel


The carbon content of this steel is above 30 points and is hardly
ever above 60 points or 0.60 per cent. Annealing such steel is
generally in quantity production and does not require the care that
the other steels need because it is very largely a much cheaper
product and a great deal of material is generally removed from
the outside surface.

The purpose for which this steel is annealed is a deciding factor
as to what heat to give it. If it is for machineability only, the
steel requires to be brought up slowly to just below the critical and
then slowly cooled in the furnace or ash pit. It must be thoroughly
covered so that there will be no access of cool air. If the annealing
is to increase ductility to the maximum extent it should be slowly
heated to slightly over the upper critical temperature and kept at
this heat for a length of time necessary for a thorough penetration
to the core, after which it can be cooled to about 1,200 deg.F., then
reheated to about 1,360 deg.F., when it can be removed and put in an
ash pit or covered with lime. If the annealing is just to relieve
strains, slow heating is not necessary, but the steel must be brought
up to a temperature not much less than a forging or rolling heat
and gradually cooled. Covering in this case is only necessary in
steel of a carbon content of more than 40 points.

Next: Annealing In Bone

Previous: Annealing Alloy Steel

Add to Add to Reddit Add to Digg Add to Add to Google Add to Twitter Add to Stumble Upon
Add to Informational Site Network

Viewed 2956