Air | 1,650 | 1,300 | 70,785 | 101,250 | 26.0 | 64.6
| | 1,380 | 66,080 | 98,335 | 28.0 | 63.6
| | 1,470 | 70,785 | 96,990 | 27.0 | 64.7
---------|----------|-----------|---------|---------|----------|---------
| | 930 | 163,070 | 202,720 | 8.0 | 18.2
Oil | 1,650 | 1,100 | 88,255 | 116,480 | 20.0 | 56.9
| | 1,300 | 77,950 | 105,505 | 25.5 | 63.8
| | 1,380 | 88,255 | 98,785 | 27.0 | 66.3
---------|----------|-----------|---------|---------|----------|---------
| | 930 | 158,815 | 202,050 | 12.0 | 34.2
Water | 1,650 | 1,100 | 90,270 | 120,735 | 22.0 | 59.8
| | 1,300 | 66,080 | 102,590 | 25.8 | 64.8
| | 1,380 | 67,200 | 97,890 | 27.0 | 65.2
-------------------------------------------------------------------------

This steel can be drawn into wire, rolled into sheets and strips
and drawn into seamless tubes.

CORROSION.--This steel like any other steel when distorted by cold
working is more sensitive to corrosion and will rust. Rough cut
surfaces will rust. Surfaces finished with a fine cut are less
liable to rust. Ground and polished surfaces are practically immune
to rust.

When chromium content is increased to 16 to 18 per cent and silicon
is added, from 2 to 4 per cent, this steel becomes rust proof in
its raw state, as soon as the outside surface is removed. It does
not need to be heat-treated in any way. These compositions are
both patented.

S. A. E. STANDARD STEELS

The following steel specifications are considered standard by the
Society of Automotive Engineers and represents automobile practice in
this country. These tables give the S. A. E. number, the composition
of the steel and the heat treatment. These are referred to by
letter--the heat treatments being given in detail on pages 134
to 137 in Chap. 8. It should be noted that the percentage of the
different ingredients desired is the mean, or halfway between the
minimum and maximum.

TABLE 4.--CARBON STEELS
------------------------------------------------------------------------------
S. A. E. | Carbon | Manganese | | |
Specification|(minimum and |(minimum and |Phosphorus| Sulphur | Heat
no. | maximum) | maximum) |(maximum) |(m