... Relief, Normalizing, Spheroidize Anneal, Annealing, OD: 1/4"-8" Executive Tube Standard: JIS G3461 Carbon steel boiler and heat-exchanger ... tube Product particular communication: 1) Size: OD > 6 mm & ... Packing Type: Round, Square, Rectangle, Hexagon. Streamline, etc. 8) Relevant Test: Chemical Component Analysis, Mechanical Properties(Ultimate tensile ...