Alloy Steel Precision Ground Bars

Tight-Tolerance Alloy Steel Precision Ground Bars for Demanding Applications

Our alloy steel precision ground bars are centerless ground to ±0.0005 inch or better for consistent diameter, straightness, and superior surface finish. Available in high-strength alloy grades, these bars support precision machining applications requiring dimensional accuracy, hardness, wear resistance, and reliable performance under demanding production conditions.

Key Features:

  • Material Composition: Available in alloy steel grades such as 4130, 4140, 4340, 8620, 6150, and 52100, with chromium, molybdenum, and nickel enhancing mechanical performance.
  • Tight Tolerances: Precision ground to exact diameters, typically within ±0.0005 inch or better, depending on application requirements.
  • Superior Surface Finish: Smooth, consistent surfaces reduce friction, improve wear resistance, and support reliable machining performance.
  • High Strength & Hardness: Engineered for demanding shafts, gears, bearings, tooling, and industrial components.
  • Good Machinability & Stability: Maintains dimensional accuracy while minimizing warping or distortion during machining.

Common Applications:

  • Aerospace & Automotive:Used for shafts, gears, axles, and precision-machined components.
  • Tool & Die Making: Ideal for punches, dies, molds, jigs, and tooling components.
  • Hydraulic & Pneumatic Systems: Suitable for piston rods, cylinder shafts, and actuators.
  • Machine Components: Used for bearings, spindles, bushings, and high-wear parts.

Available Sizes & Shapes:

  • Round Bars
  • Flat Bars
  • Square Bars
  • Custom Cut Lengths
Alloy steel precision ground bars are available in multiple grades, each providing distinct strength, hardness, wear resistance, machinability, and heat-treatment capabilities for demanding industrial applications.

Low Alloy Steel Grades

  • 4140 – Chromium-molybdenum steel offering high strength, toughness, and wear resistance.
  • 4340 – Nickel-chromium-molybdenum steel with excellent toughness and fatigue
  • 8620 – Low-carbon case-hardening steel providing a hard surface and tough core.

Medium & High Alloy Steel Grades

  • 6150 – Chromium-vanadium steel with excellent strength, toughness, and fatigue resistance.
  • 52100 – High-carbon chromium bearing steel offering exceptional hardness and wear resistance.
  • 4130 – Chromium-molybdenum steel used in aerospace and automotive applications.

Tool & Die Steel Grades

  • H13 – Hot-work tool steel with high heat resistance and toughness for dies and molds.
  • D2 – High-carbon, high-chromium tool steel with excellent wear resistance and dimensional stability.