Notes:

2. To meet the tensile strength requirements, the hardness shall be over Brinell 201 (Rockwell B94) minimum.

3. Materials of all Grades of Classes 1, 1B and 1C and Grade B8S products are carbide solution treated.

Materials of all Grades of Class 1A and Grades B8RA and B8SA products are carbide solution treated in their finished condition for corrosion resistance; heat treatment is critical due to physical property requirements. Materials of all Grades of Class 2 and Class 3 products ar ecarbide solution treated and strain hardened. Austenitic steel in the strain hardened condition may not show uniform properties throughout the section, particularly in diameters over 3/4 in.

4. For diameters 3/4 in. and smaller, a maximum hardness of Brinell 241 (Rockwell B100) is permitted.

5. For diameters 1-1/2 in. and larger, center (core) properties may be lower than indicated by test reports which are based on values determined at mid radius.