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 The following suppliers (machine shops, fabricators, casters, molders, 3D printing, CNC machining, etc.) provide manufacturing services and are members of the MFG.com community. For more information visit http://www.mfg.com. MFG.com performs a 5-point inspection on all engineered parts and RFQs to ensure quality and enhance your 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.