Figure 3-1.--Examples of continuous identification marking.
recognized technical society or industrial association,
The manufacturer is required to make these
such as the American Iron and Steel Institute
markings on materials before delivery. The marking
intervals for various shapes and forms are specified in
Some of the physical conditions and quality
the Federal Standard previously mentioned.
designations for various metal products are as follows:
Figure 3-1 shows the normal spacing and layout.
C R . . . . . . . . . . . . . cold rolled
For metal products, the continuous identification
CD . . . . . . . . . . . . . cold drawn
marking must include (1) the producer's name or
registered trademark and (2) the commercial
HR . . . . . . . . . . . . . hot rolled
designation of the material. In nonferrous metals the
AQ . . . . . . . . . . . . . aircraft quality
government specification for the material is often used.
The producer's name or trademark shown is that of the
CQ . . . . . . . . . . . . . commercial quality
producer who does the final processing or finishing
1/4H . . . . . . . . . . . . quarter hard
before the material is marketed. The commercial
designation includes the following information:
1/2H . . . . . . . . . . . . half hard
H .............
hard
1. A material designation, such as an SAE
number, an AISI number, or an ASTM (American
HTQ . . . . . . . . . . . . high tensile quality
Society of Testing Materials) specification
AR . . . . . . . . . . . . . as rolled
2 . A "physical condition" and quality
HT . . . . . . . . . . . . . heat treated
designation-that is, the designation of temper or other
G . . . . . . . . . . . . . . ground
physical condition approved by a nationally
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