Specification Brand : OnlineMetals BulletPoint : Price For: Each BulletPoint1 : 4340 steel is easily weldable, has high strength, toughness, wear resistance, and fatigue strength. BulletPoint2 : Annealed BulletPoint3 : 4340 is typically used in military aircraft, automotive systems, hydraulic parts, machine tools, and a steel crankshafts. BulletPoint4 : Meets ASTM-A29, ASTM-A108, ASTM-A322, AMS-6415, AMS-6484, AMS/MIL-S-5000 BulletPoint5 : Mild Steel ItemForm : Bar ItemName : 4340 Alloy Steel Round Bar, Unpolished (Mill) Finish, Rough Turned, Annealed, 1.25" Diameter, 12" Length, OnlineMetals ItemPackageDimensions_Height : 1 inches ItemPackageDimensions_Length : 16 inches ItemPackageDimensions_Width : 18 inches ItemPackageQuantity : 1 ItemShape : Round ItemTypeKeyword : steel-bars Manufacturer : OnlineMetals Material : Alloy Steel 4340 NumberOfItems : 1 PartNumber : OM-25267120 ProductDescription : Alloy: 4340 | Material: Alloy Steel | Shape: Bar-Round | Production Method: Hot Rolled Rough Turned | Diameter: 1.25 Inches | Item Length: 12 Inches Alloy Steel Round Bar 4340 Normalized Rough Turned has high strength, toughness, wear resistance, and fatigue strength. It can be machined in all states other than hardened and it is easily welded. Additionally, 4340 can be cold worked easily in the annealed state. It is typically used in military aircraft, automotive systems, hydraulic parts, machine tools, and a steel crankshafts. Alloy steels are made by combining carbon steel with one or several alloying elements, such as manganese, silicon, nickel, titanium, copper, chromium and aluminum. These metals are added to produce specific properties that are not found in regular carbon steel. The elements are added in varying proportions (or combinations) making the material take on different aspects such as increased hardness, increased corrosion resistance, increased strength, improved formability (ductility); the weldability can also change. UNS G43400, AISI 4340, Alloy Steel This product weighs 4.17 pounds and meets the following specs: ASTM-A29, ASTM-A108, ASTM-A322, AMS-6415, AMS-6484, AMS/MIL-S-5000 ProductSiteLaunchDate : 2020-06-01T18:30:48.549Z Size : 1.25" dia Style : 12" length