4140 Steel Bar

Size ranging from .250" to 15"

4140 steel bar is formed using a medium carbon alloy steel. One of the most common alloy grades, 4140 possesses high fatigue strength, abrasion, and impact resistance, as well as increased durability especially in the quench and tempered form. 4140 steel bar is highly used in the automotive, oil patch, and construction industries in the form of axles, shafts, and bolts.

Requirement Specifications we can meet:

  • ASTM A29
  • ASTM A576
  • JDM QL-2 certified

Shapes Available

  • Rounds
  • Square
  • Hexagon
  • Rounded Cornered Square
  • Flats
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Hot Rolled Steel Properties

Chemical Properties
Carbon 0.38 – 0.43
Manganese 0.75 – 1.00
Phosporus (max) 0.035
Sulfur (max) 0.040
Silicon 0.15 – 0.35
Chromium 0.80 – 1.10
Molybdenum 0.15 – 0.25

If your application requires specific mechanical properties, please inquire with our sales team.

Process Services

King Steel offers a variety of value-added services to improve your workflow and quality control. Our processing capabilities include:

  • Turn and Polish
  • Cold Drawing
  • Annealing
  • Chamfering
  • Grinding
  • Quench and Temper
  • Heat Treated
  • Machine Straightening
  • Precision Saw Cutting
  • Custom Shapes
  • Shot Blast
  • Eddy Current Testing
  • Turn, Ground & Polished
  • Cold Drawn, & Polished
  • Straighten & Cut
  • Ultrasonic Testing
  • Pickle & Oil
  • Stress Relieve
  • Normalize
  • Case Hardening

Learn more about our processing capabilities.

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