A low carbon steel with a medium manganese content. Has good hardening properties, fair machinability and is excellent for cold bending and forming operations Readily brazed and welded. Suitable for shafting and for applications that do not require the greater strength of high carbon and alloy steels. Conforms to ASTM A-108 and AMS 5069. (Not applicable to bars under 2 15/16" and sizes lighter than 29.34 lbs per foot.)
Unit of Measure



N/A Type 1018 Steel


N/A Round Bar


N/A 5/16 inches


N/A 0.3125 inches7.9375 mm

Estimated Weight

N/A 0.261 lbs/ft0.388410804 kg/m

Estimated Weight per 20' Bar

N/A 522 lbs236.7792 kg

ASTM Specification

N/A AMS 5069 ASTM A-108

Standard Length

N/A 20 ft