4140R

Steel availability

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Round        L. Hot       1 "to 24"

License plate            L. Hot       1/2 to 4 1/2 "

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Average Chemical Analysis

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               C          Yes        Mn          P        S     Cr   Neither   Mo  W   V   Others  BHN / HRC

4140R      0.43-0.50     ≤ 0.40   0.60 0.90   ≤ 0.040  ≤ 0.050     -     -      -   -      -      -        193-295

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Heat treatment

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               Temper temperature (° C)         Cooling Medium (° C)            Tempering (° C)

4140R            840-870                        Oil                        250-700

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Features and Applications

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4140R

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Parts that require high tensile strength and high toughness: crankshafts, transmission gears, shafts, connecting rods, insert holders, parts for pumps, studs, etc.