1.1 This specification covers seven regular grades of ferrosilicon for steelmaking and foundry uses designated A, B, C, D, E, F, and G, and subgrades designated as low-aluminum, boron-bearing, and calcium-bearing.

1.2 The values stated in inch-pound units are to be regarded as the standard. The metric equivalents of inch-pound units (SI units) given in parentheses may be approximate.