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

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

Crankshaft
The crankshaft was the most highly stressed part of the entir...

Heat Treatment Of Lathe Planer And Similar Tools
FIRE.--For these tools a good fire is one made of hard foundr...

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

The Pyrometer And Its Use
In the heat treatment of steel, it has become absolutely nece...

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

Temperature For Annealing
Theoretically, annealing should be accomplished at a tempera...

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

Chrome-nickel Steel
Forging heat of chrome-nickel steel depends very largely on ...

Temperatures To Use
As soon as the temperature of the steel reaches 100 deg.C. (...

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

Care In Annealing
Not only will benefits in machining be found by careful anne...

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

Brown Automatic Signaling Pyrometer
In large heat-treating plants it has been customary to mainta...

Hardening Operation
Hardening a gear is accomplished as follows: The gear is tak...

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

Complete Calibration Of Pyrometers
For the complete calibration of a thermo-couple of unknown e...

Carbon Steels For Different Tools
All users of tool steels should carefully study the different...

Hints For Tool Steel Users
Do not hesitate to ask for information from the maker as to t...



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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