Titanium ASTM designation

The vast majority of vessels are constructed of ferrous and nonferrous alloys. Ferrous alloys are defined as those having more than 50% iron. They are used in the ASME Code, VIII-1 and 2, and include carbon and low-alloy steels, stainless steels, cast iron, wrought iron, and quenched and tempered steels. Nonferrous alloys include aluminum, copper, nickel, titanium, and zirconium. The ASTM designates all ferrous alloys by the letter A and all nonferrous alloys by B. ASME uses the prefixes SA and SB, respectively, In most cases the ASME and ASTM specifications are identical. However, vessels built to the ASME Code usually refer to the ASME specifications. 

Apart from the ASTM grades, the world s largest titanium producers have proposed their own commercial designations for grades. For example, the commercial designations according to several of the chief titanium producers are listed in Table 4.50. 

Kemlra 470 is a rutile titanium dioxide pigment designed to meet the needs of the most demanding plastics applications. It has the same brightness and tone properties as standard Kemira 460 but is end-treated to impart hydrophobic properties. This results in outstanding dispersibility and significantly improved high temperature performance. Kemira 470 rutile titanium dioxide meets the requirements of specification ASTM D 476-84 (1989), Type II III. 

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