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4140 Alloy Round Bar

4140 Alloy Steel Round, is an 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 Round responds well to heat-treatment and is relatively easy to machine in the annealed condition. 4140 Alloy Steel Round has good strength and wear resistance, excellent toughness, coupled with good ductility, and the ability to resist stress at elevated temperatures.
  • Specifications: ASTM A331, AISI 4140
  • AKA: CDA Alloy Round, Alloy steel shaft
  • Applications: shafts, axels, bolts, sprockets, piston rods, rams, etc.
  • Workability: Moderate to Weld, Cut and Machine.
  • Mechanical Properties:Brinell = 223, Tensile = 102,000 +/-,
    Yield = 90,000 +/-
  • How is it Measured? Diameter (A) 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.

4140 Alloy Round Bar
NEW Cut-to-Size Service available on these items! Call 1-859-745-2650 for details.
Stock
Number
Product Type Item Size & Description
(Inches)
Click! Arrow to
Select Size
Qty Select / Price
R214-4140 Alloy 4140 Steel Round - Cold Drawn Annealed 1/4 inch
R212-4140 Alloy 4140 Steel Round - Cold Drawn Annealed 1/2 inch
R258-4140 Alloy 4140 Steel Round - Cold Drawn Annealed 5/8 inch
R234-4140 Alloy 4140 Steel Round - Cold Drawn Annealed 3/4 inch
R278-4140 Alloy 4140 Steel Round - Cold Drawn Annealed 7/8 inch
R21516-4140 Alloy 4140 Steel Round - Cold Drawn Annealed 15/16 inch
R21-4140 Alloy 4140 Steel Round - Cold Drawn Annealed 1 inch
R2118-4140 Alloy 4140 Steel Round - Cold Drawn Annealed 1-1/8 inch
R2114-4140 Alloy 4140 Steel Round - Cold Drawn Annealed 1-1/4 inch
R2138-4140 Alloy 4140 Steel Round - Cold Drawn Annealed 1-3/8 inch
R2112-4140 Alloy 4140 Steel Round - Cold Drawn Annealed 1-1/2 inch
R2158-4140 Alloy 4140 Steel Round - Cold Drawn Annealed 1-5/8 inch
R2134-4140 Alloy 4140 Steel Round - Cold Drawn Annealed 1-3/4 inch
R2178-4140 Alloy 4140 Steel Round - Cold Drawn Annealed 1-7/8 inch
R22-4140 Alloy 4140 Steel Round - Cold Drawn Annealed 2 inch
Quantity Length in Feet, Inches and Fraction of Inch
PCS FT and IN  
Custom cut tolerances = plus / minus 1/16"
Call Us for Mitering and Large Quantities.
Quantity Width in Inches Length in Inches
PCS and X and  
Custom cut tolerances = plus / minus 1/16"
Call Us for Mitering and Large Quantities.