Table 1-4.Metal Identification by Chip Test
and in high-carbon steel, they are small and repeating.
these metals must be distinguished from each other by
Both metals produce a spark stream white in color.
Gray cast iron (view C) produces a stream of sparks
about 25 inches in length. The sparklers are small and
repeating, and their volume is rather small. Part of the
stream near the wheel is red, and the outer portion is
Monel and nickel (view D) form almost identical
spark streams. The sparks are small in volume and
orange in color. The sparks form wavy streaks with no
sparklers. Because of the similarity of the spark picture,
some other method.
Stainless steel (view E) produces a spark stream
about 50 inches in length, moderate volume, and with
few sparklers. The sparklers are forked. The stream next
to the wheel is straw-colored, and at the end, it is white.
The wrought-iron spark test (view F) produces a
spark stream about 65 inches in length. The stream has
a large volume with few sparklers. The sparks appear
near the end of the stream and are forked. The stream
next to the wheel is straw-colored, and the outer end of
the stream is a brighter red.