Ryerson’s carbon steel round bar offering includes both Special Bar Quality (SBQ) and Merchant Bar Quality ( MBQ). SBQ grades include 1018, 1045, 1117, 1141, 1144, 1215, 12L14, Stressproof and Fatigueproof. These are stocked in a variety of sizes and finishes designed to meet various strength, machinability and weldabilty requirements. MBQ bar is produced to A-36 and most of the sizes are also produced to A-529-50 and A-572-50. MBQ products are widely used in applications requiring strength while offering superior ductility and weldability.