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Pyrometers For Molten Metal
Pyrometers for molten metal are connected to portable thermoc...

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

Double Annealing
Water annealing consists in heating the piece, allowing it to...

Restoring Overheated Steel
The effect of heat treatment on overheated steel is shown gra...

Pickling The Forgings
The forgings were then pickled in a hot solution of either ni...

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

Calibration Of Pyrometer With Common Salt
An easy and convenient method for standardization and one whi...

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

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

Cutting-off Steel From Bar
To cut a piece from an annealed bar, cut off with a hack saw,...

Annealing Method
Forgings which are too hard to machine are put in pots with ...

Annealing Of High-speed Steel
For annealing high-speed steel, some makers recommend using g...

Carbon-steel Forgings
Low-stressed, carbon-steel forgings include such parts as car...

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

The Quenching Tank
The quenching tank is an important feature of apparatus in c...

High Speed Steel
For centuries the secret art of making tool steel was handed ...

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

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

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

Rate Of Absorption
According to Guillet, the absorption of carbon is favored by ...



Properties Of Alloy Steels






Category: ALLOYS AND THEIR EFFECT UPON STEEL

The following table shows the percentages of carbon, manganese,
nickel, chromium and vanadium in typical steel alloys for engineering
purposes. It also gives the elastic limit, tensile strength, elongation
and reduction of area of the various alloys, all being given the same
heat treatment with a drawing temperature of 1,100 deg.F. (600 deg.C.). The
specimens were one inch rounds machined after heat treatment.

Tungsten is not shown in the table because it is seldom used in
engineering construction steels and then usually in combination
with chromium. Tungsten is used principally for the magnets of
magnetos, to some extent in the manufacture of hacksaws, and for
special tool steels.

TABLE I.--PROPERTIES OF ALLOY STEELS
------------------------------------------------------------------------------
Manganese,/ Chromium,/ ElasticTensile ElongationReduction
Carbon, per /Nickel, per /Vanadium,limit, Strength,in 2 in., of area,
per cent per cent per cent lb. perlb. per per cent per cent
cent cent sq. in.sq. in.
----------------------------------------------------------------------
0.27 0.55 49,000 80,000 30 65
0.27 0.47 0.26 66,000 98,000 25 52
0.36 0.42 58,000 90,000 27 60
0.34 0.87 0.13 82,500 103,000 22 57
0.45 0.50 65,000 96,000 22 52
0.43 0.60 0.32 96,000 122,000 21 52
0.47 0.90 0.15 102,000 127,500 23 58
0.30 0.60 3.40 75,000 105,000 25 67
0.33 0.63 3.60 0.25 118,000 142,000 17 57
0.30 0.49 3.60 1.70 119,000 149,500 21 60
0.25 0.47 3.47 1.60 0.15 139,000 170,000 18 53
0.25 0.50 2.00 1.00 102,000 124,000 25 70
0.38 0.30 2.08 1.16 120,000 134,000 20 57
0.42 0.22 2.14 1.27 0.26 145,000 161,500 16 53
0.36 0.61 1.46 0.64 117,600 132,500 16 58
0.36 0.50 1.30 0.75 0.16 140,000 157,500 17 54
0.30 0.50 0.80 90,000 105,000 20 50
0.23 0.58 0.82 0.17 106,000 124,000 21 66
0.26 0.48 0.92 0.20 112,000 137,000 20 61
0.35 0.64 1.03 0.22 132,500 149,500 16 54
0.50 0.92 1.02 0.20 170,000 186,000 15 45
------------------------------------------------------------------------------





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