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Steel Making

Hardening High-speed Steels
We will now take up the matter of hardening high-speed steels...

A Satisfactory Luting Mixture
A mixture of fireclay and sand will be found very satisfactor...

Phosphorus is one of the impurities in steel, and it has been...

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

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

Steel For Chisels And Punches
The highest grades of carbon or tempering steels are to be re...

Chromium when alloyed with steel, has the characteristic func...

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

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

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

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

Heat-treating Equipment And Methods For Mass Production
The heat-treating department of the Brown-Lipe-Chapin Company...

Forging High-speed Steel
Heat very slowly and carefully to from 1,800 to 2,000 deg.F....

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

Properties Of Steel
Steels are known by certain tests. Early tests were more or l...

Typical Oil-fired Furnaces
Several types of standard oil-fired furnaces are shown herew...

Oil-hardening Steel
Heat slowly and uniformly to 1,450 deg.F. and forge thorough...

Protective Screens For Furnaces
Workmen needlessly exposed to the flames, heat and glare from...

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

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

Instructions For Working High-speed Steel


Owing to the wide variations in the composition of high-speed steels
by various makers, it is always advisable to follow the directions
of each when using his brand of steel. In the absence of specific
directions the following general suggestions from several makers
will be found helpful.

The Ludlum Steel Company recommend the following:

CUTTING-OFF.--To cut a piece from an annealed bar, cut off with
a hack saw, milling cutter or circular saw. Cut clear through the
bar; do not nick or break. To cut a piece from an unannealed bar,
cut right off with an abrasive saw; do not nick or break. If of
large cross-section, cut off hot with a chisel by first slowly
and uniformly heating the bar, at the point to be cut, to a good
lemon heat, 1,800 deg.-1,850 deg.F. and cut right off while hot; do not nick
or break. Allow the tool length and bar to cool before reheating
for forging.

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