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The Effect Of Tempering On Water-quenched Gages
The following information has been supplied by Automatic and ...

Process Of Carburizing
Carburizing imparts a shell of high-carbon content to a low-...

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

Open Hearth Process
The open hearth furnace consists of a big brick room with a l...

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

Annealing In Bone
Steel and cast iron may both be annealed in granulated bone. ...

Preventing Carburizing By Copper-plating
Copper-plating has been found effective and must have a thick...

There is no mystery or secret about the proper annealing of d...

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

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

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

Quenching The Work
In some operations case-hardened work is quenched from the bo...

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

Composition And Properties Of Steel
It is a remarkable fact that one can look through a dozen tex...

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

Affinity Of Nickel Steel For Carbon
The carbon- and nickel-steel gears are carburized separately...

Heat-treating Department
The heat-treating department occupies an L-shaped building. ...

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

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

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

High-chromium Or Rust-proof Steel


High-chromium, or what is called stainless steel containing from
11 to 14 per cent chromium, was originally developed for cutlery
purposes, but has in the past few years been used to a considerable
extent for exhaust valves in airplane engines because of its resistance
to scaling at high temperatures.

Carbon 0.20 to 0.40
Manganese, not to exceed 0.50
Phosphorus, not to exceed 0.035
Sulphur, not to exceed 0.035
Chromium 11.50 to 14.00
Silicon, not to exceed 0.30

The steel should be heated slowly and forged at a temperature above
1,750 deg.F. preferably between 1,800 and 2,200 deg.F. If forged at temperatures
between 1,650 and 1,750 deg.F. there is considerable danger of rupturing
the steel because of its hardness at red heat. Owing to the
air-hardening property of the steel, the drop-forgings should be
trimmed while hot. Thin forgings should be reheated to redness
before trimming, as otherwise they are liable to crack.

The forgings will be hard if they are allowed to cool in air. This
hardness varies over a range of from 250 to 500 Brinell, depending
on the original forging temperature.

Next: Annealing

Previous: Effect Of A Small Amount Of Copper In Medium-carbon Steel

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