4140 Engineering Steel Alloy Steel Flat Bar Cold Drawn

4140 Alloy Steel Flat is a cold drawn annealed steel of relatively high hardenability with its chromium content provides good hardness penetration, and the molybdenum imparts uniformity of hardness and high strength. 4140 Alloy Steel Flat responds well to heat-treatment and is relatively easy to machine in the annealed condition. 4140 Alloy Steel Flat has good strength and wear resistance, excellent toughness, coupled with good ductility, and the ability to resist stress at elevated temperatures.

• Specifications: ASTM A331, A108-13, AISI 4140
• AKA: CDA Alloy Flat, 4140 Rectangle Bar
• Applications: brake dies, fixtures, jigs, blades, tool holders, etc.
• Workability: Moderate to Weld, Cut and Machine.
• Mechanical Properties: Brinell = 197-223, Tensile = 95ksi
• How is it Measured? Thickness (A) X Width (B) X Length
• Available Stock Sizes: 2ft, 4ft, 6ft, 8ft, 12ft or Cut to Size

Stock lengths may vary +/- 1/4"
Please call if you need specific lengths.

AISI SAE 4140 alloy steel is a chromium molybdenum alloy steel specification widely used in general purpose high tensile steel for components, like axles, shafts, bolts, gears and other applications. Similar to alloy grade AISI 4130 chrome moly alloy steel but with a slightly higher carbon content. The higher carbon content of AISI 4140 steel gives greater strength and heat treatment capabilities in comparison to AISI / ASTM 4130 alloy steels, however it does have inferior weldability characteristics.