CD 8620 Bar

CD 8620 bar

Characteristics

Cold drawn (CD) 8620 bar is the most widely used carburizing alloy.  The nickel content imparts good toughness and ductility, and the chromium and molybdenum increases hardness penetration and wearability.  The balanced alloy’s hardening to produce a strong tough core and high case hardness.  It machines at 110 sfm and has good welding qualities.

**Lead added to this grade increases parts production by up to 25% with excellent finish and good tool life.  Machining speeds are increased to 145 sfm, and there are no negative effects on properties.

Applications

Typical applications for CD 8620 bar are gears, pinions, spline shafts, and other applications requiring a hard wear surface and a ductile core.

Sizes

  • Diameter: 0.125" thru 12"
  • Stock Lengths: 10' thru 24'

Typical Chemistry Properties

Carbon, %

0.18 - 0.23

Manganese, %

0.70 - 0.90

Phosphorus, %

0.035

Sulfur, %

0.040

Silicon, %

0.15 - 0.35

Nickel, %

0.40 - 0.70

Chromium, %

0.40 - 0.60

Molybdenum, %

0.15 - 0.25

*Lead - .15-.25 (Applies only to 86L20)

Typical Mechanical Properties

Tensile Strength ksi

85 - 115

Yield Strength

60 - 100

Elongation in 2"

10% - 25%

Reduction of area

30% - 50%

Brinelle Hardness

170 - 230

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