The codes below display in the CL: Classification field.

The headings in square brackets are not classification codes and do not appear in the classification code field; they are subject headings to show the organization of the classification codes.

[Microstructure]
A1 Constitutional and Structural Hardening
A2 Microstructure
A3 Atomic Properties
A4 Irradiation

[Testing Methods and Analysis]
B1 Structural Analysis
B2 Testing and Quality Control
B3 Chemical Analysis

[Properties and Characteristics]
C1 Mechanical Properties
C2 Physical Properties
C3 Electrical and Magnetic Phenomena
C4 Chemical and Electrochemical Properties
C5 Corrosion

[Engineered Materials Production]
D1 Raw Materials
D2 Materials Development

[Processes]
E1 Casting and Molding
E2 Working and Forming
E3 Machining
E4 Powder Metallurgy
E5 Joining
E6 Heat Treatment
E7 Surface Treatment

[Engineering]
F1 Engineering Components and Structures

[Miscellaneous]
G2 Special Publications