IS 1977-1975

标准号：IS 1977-1975
发布日期：1975/5/1 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：1.1 This standard covers the requirements for two grades of mild steel (ordinary quality) designated as Fe 310-O (St 32-O) [see IS: 1762 ( Part I )-1974‖ ] and Fe 410-O ( St 42-O ) [see IS : 1762 ( Part I )-1974‖ ]. Steel Fe 310-O (St 32-O) is intended for general engineering purposes and Steel Fe 410-O ( St 42-O) is intended for use in structural work ( see also 0.3 ).1.1.1 The steel may also be supplied in the copper-bearing quality in which case it shall be designated as Fe 310 Cu-O (St 32-OC) and Fe 410Cu-O (St42-OC).