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

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

Tempering Round Dies
A number of circular dies of carbon tool steel for use in too...

Tensile Properties
Strength of a metal is usually expressed in the number of pou...

Lathe And Planer Tools
TO FORGE.--Gently warm the steel to remove any chill is parti...

Alloying Elements
Commercial steels of even the simplest types are therefore p...

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

Conclusions
Martien was probably never a serious contender for the honor ...

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

Corrosion
This steel like any other steel when distorted by cold worki...

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

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

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

Heat Treatment Of Axles
Parts of this general type should be heat-treated to show the...

The Influence Of Size
The size of the piece influences the physical properties obta...

Sulphur
SULPHUR is another element (symbol S) which is always found i...

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

Fatigue Tests
It has been known for fifty years that a beam or rod would fa...

Gears
The material used for all gears on the Liberty engine was sel...

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



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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