Explanation
The non-alloy steel used to make engineering structural parts and mechanical parts is generally low-cardon steel. Mechanical manufacturing also includes some medium carbon steel and even high carbon steel. Ordinary carbon structural steel (GB/TKI0-2006) is low carbon steel, which is widely used to directly produce various 1: way structural parts. Performance steel designation is used, which is mainly supplied according to strength and quality grade. The letter Q is followed by yield strength values (including 195, 215, 235 and 275MPa grades), If necessary, add quality grade symbols (in English alphabetical order, A is ordinary. B is to ensure 20 ° C impact resistance, C is to ensure 0 ° C impact resistance, and I) is to ensure -20 ° C impact toughness); High quality carbon structural steel (GB/T699-1999) is made of steel designation, which can be used to manufacture various T structural parts, as well as various mechanical structural parts requiring heat treatment.
Classification
Metals -> Steels -> Non-alloy steels