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8620 HR Alloy Bar

HR 8620 steel bar is a low carbon nickel chromium molybdenum alloy with good carburized properties, formability, and weldability. This grade is a low-cost steel that is the most widely used carburizing alloy. Due to its nickel content, this grade has a high strength case and core toughness. The chromium and molybdenum support carburizing, and give good surface hardness and wear. Eaton Steel Bar Company stocks many diameters of 8620 hot rolled steel to meet the markets demand. We also supply 8620 steel bar to various industries like aerospace, agriculture, ATV, construction, and motorcycle.

8620 hot-rolled-steel-bar

8620 HR Steel Bar Applications

Typical applications for this grade include gears, pinions, shafts, bushings, and bolts. 

Shapes and Sizes

Eaton Steel Bar Company supplies 8620 steel bar in a variety of sizes ranging from 5/8”-15”. The shapes available for this grade include:

  • Rounds
  • Rounded Cornered Square

Standard "8620 Grade" Chemical Composition

Carbon 0.18-0.23
Manganese 0.70-0.90
Phosphorus (max) 0.035
Sulfur (max) 0.040
Silicon 0.15-0.35
Nickel 0.40-0.70
Chromium 0.40-0.60
Molybdenum 0.15-0.25


Estimated Mechanical Property Ranges for "Grade 8620"

Tensile strength (psi) 80,000 - 90,000
Yield strength (psi) 55,000 - 65,000
Elongation in 2” (%) 22 - 32
Reduction of area (%) 40 - 50
Brinell Hardness (BHN) 160 - 190