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8630 Hot Rolled SBQ Bar

Hot rolled 8630 steel is a medium carbon, low alloy grade that contains nickel, chromium, and molybdenum. It is characterized as having fair hardenability, and good strength and toughness. Eaton Steel Bar Company stocks many diameters of 8630 hot rolled steel to meet the market demands. We also supply AISI 8630 steel bar to various industries like automotive, and oil and gas.

1018 hot-rolled-steel-bar


Typical applications for this grade of steel include gears, shafts, and forged connectors.


Eaton Steel Bar Company can meet the following specifications for this grade:

  • ASTM A29
  • ASTM A322

Shapes and Sizes

Eaton Steel Bar Company supplies 8630 steel bar in a variety of sizes ranging from 7/8”- 3”. The shapes available for this grade include:

  • Rounds
  • Rounded Cornered Square

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Standard "8630 Grade" Chemical Composition

Carbon 0.28-0.33
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 8630"

Tensile strength (psi) 85,000 - 95,000
Yield strength (psi) 60,000 - 70,000
Elongation in 2” (%) 20 - 30
Reduction of area (%) 37 - 47
Brinell Hardness (BHN) 170 - 200