ASTM: ASTM A513
(Standard Specification for Electric-Resistance-Welded Carbon and Alloy Steel Mechanical Tubing)
Characteristics: Uncoated, semi-smooth dark black or brown finish. A welded tube with all flash removed.
Workability: Excellent candidate for most processing techniques.
Applications: Designed for high strength-close tolerance projects. Bushing, Axles, Hydraulic Cylinders, Hinges
A.K.A: Bushing, Seamless