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4140 Heat Treated Alloy Round


4140_heat_treated_prehard_round_bar

Cold Finish | Hot Rolled

4140 heat treated alloy is a chromium-molybdenum, medium carbon alloy steel, and is used in a wide variety of applications requiring high strength and toughness. The chromium imparts good hardness penetration while molybdenum provides hardness uniformity and strength. In the heat treated or prehard conditions it is in the 26-32 Rockwell C range and stress relieved to minimize warping during machining. Localized hardness may also be imparted by flame or induction hardening. Primarily used in press brake dies, 4140 is also a good choice for applications requiring greater toughness than mild steel. Other typical applications include: bolts, molds, stripper plates, slides, ejector plates, jigs, fixtures, punch plates, drill collars, couplings, axle shafts, valves, machinery shafts, reamer bodies, machine stops.

  • Finish: Cold Finished/Ground
  • Available Sizes: 3/8" thru 3 3/4" Dia
  • Tolerances: +0/-.008"
  • Condition: Heat Treated 26-32 Rockwell C
  • Applications: molds, stops, shafts, valves, collars, plates, bolts, slides
  • Specifications: A193, J1397, AMS 6349, G41400
  • Available in full bars or cut to size lengths, production cutting available
  • Color Code: ORANGE

    Chemical Composition:

    Carbon: 0.38/0.43
    Chromium: 0.80/1.00
    Molybdenum: 0.15/0.25
    Manganese: 0.75/1.00
    Silicon: 0.15/0.35
    Phosphorus: 0.035 max
    Sulfur: 0.040 max




    Click here to view our Alloy Steel Guide



    4140 HT CF Alloy Round Stock Sizes:

    3/8" Dia 4140 CF HT Alloy Round
    1/2" Dia 4140 CF HT Alloy Round
    9/16" Dia 4140 CF HT Alloy Round
    5/8" Dia 4140 CF HT Alloy Round
    11/16" Dia 4140 CF HT Alloy Round
    3/4" Dia 4140 CF HT Alloy Round
    13/16" Dia 4140 CF HT Alloy Round
    7/8" Dia 4140 CF HT Alloy Round
    15/16" Dia 4140 CF HT Alloy Round
    1" Dia 4140 CF HT Alloy Round
    1-1/16" Dia 4140 CF HT Alloy Round
    1-1/8" Dia 4140 CF HT Alloy Round
    1-3/16" Dia 4140 CF HT Alloy Round
    1-1/4" Dia 4140 CF HT Alloy Round
    1-5/16" Dia 4140 CF HT Alloy Round
    1-3/8" Dia 4140 CF HT Alloy Round
    1-7/16" Dia 4140 CF HT Alloy Round
    1-1/2" Dia 4140 CF HT Alloy Round
    1-9/16" Dia 4140 CF HT Alloy Round
    1-5/8" Dia 4140 CF HT Alloy Round
    1-11/16" Dia 4140 CF HT Alloy Round
    1-3/4" Dia 4140 CF HT Alloy Round
    1-13/16" Dia 4140 CF HT Alloy Round
    1-7/8" Dia 4140 CF HT Alloy Round
    1-15/16" Dia 4140 CF HT Alloy Round
    2" Dia 4140 CF HT Alloy Round
    2-1/8" Dia 4140 CF HT Alloy Round
    2-1/4" Dia 4140 CF HT Alloy Round
    2-3/8" Dia 4140 CF HT Alloy Round
    2-1/2" Dia 4140 CF HT Alloy Round
    2-5/8" Dia 4140 CF HT Alloy Round
    2-3/4" Dia 4140 CF HT Alloy Round
    3" Dia 4140 CF HT Alloy Round
    3-1/4" Dia 4140 CF HT Alloy Round
    3-1/2" Dia 4140 CF HT Alloy Round
    3-3/4" Dia 4140 CF HT Alloy Round


    4140_heat_treated_prehard_round_bar
  • Finish: Hot Rolled
  • Available Sizes: 4" thru 13" Dia
  • Tolerances: +.060/.250"
  • Condition: Heat Treated 26-32 Rockwell C
  • Applications: molds, stops, shafts, valves, collars, plates, bolts, slides
  • Specifications: A434, J1397, AMS 6349, G41400
  • Available in full bars or cut to size lengths, production cutting available
  • Color Code: ORANGE




    4140 HT HR Alloy Round Stock Sizes:

    4" Dia 4140 HR HT Alloy Round
    4-1/4" Dia 4140 HR HT Alloy Round
    4-1/2" Dia 4140 HR HT Alloy Round
    4-3/4" Dia 4140 HR HT Alloy Round
    5" Dia 4140 HR HT Alloy Round
    5-1/4" Dia 4140 HR HT Alloy Round
    5-1/2" Dia 4140 HR HT Alloy Round
    5-3/4" Dia 4140 HR HT Alloy Round
    6" Dia 4140 HR HT Alloy Round
    6-1/4" Dia 4140 HR HT Alloy Round
    6-1/2" Dia 4140 HR HT Alloy Round
    6-3/4" Dia 4140 HR HT Alloy Round
    7" Dia 4140 HR HT Alloy Round
    7-1/2" Dia 4140 HR HT Alloy Round
    8" Dia 4140 HR HT Alloy Round
    8-1/2" Dia 4140 HR HT Alloy Round
    9" Dia 4140 HR HT Alloy Round
    9-1/2" Dia 4140 HR HT Alloy Round
    10" Dia 4140 HR HT Alloy Round
    10-1/2" Dia 4140 HR HT Alloy Round
    11" Dia 4140 HR HT Alloy Round
    11-1/2" Dia 4140 HR HT Alloy Round
    12" Dia 4140 HR HT Alloy Round
    12-1/2" Dia 4140 HR HT Alloy Round
    13" Dia 4140 HR HT Alloy Round

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