AISI 4130/4140 NACE, API 6A This item was sourced on www.MFG.com as one of the items in an RFQ in CANADA for Alloy Steel Buyer is in search of AISI 4130/4140 NACE material to finish at 21" Diameter x 23.5" Long. Part Part Number: AISI 4130/4140 NACE, API 6A Material: Material Grade: Technical Specifications Category:Alloy Steel Dimensions0.0 x 0.0 inch Annual Usage:5.0 Are you looking for suppliers (machine shops, fabricators, casters, molders, 3D printing, CNC machining, etc.) to provide manufacturing services for machine tool industry, automotive industry? For more information visit MFG.com. MFG.com performs a 5-point inspection on all engineered parts and RFQs to ensure quality and enhance your online quoting experience Alloy Steel: Alloy Steel is an iron/carbon steel combined with various other elements such as chromium, cobalt, copper, manganese, molybdenum, nickel, tungsten, or vanadium to obtain desirable properties.