4320 Steel Bar

Size ranging from .250" to 15"

4340 alloy steel bar is formed using a medium-carbon alloy. Similar to 4140 steel, 4340 is recognized for its durability and superior impact properties especially when induction hardened. Mainly found in the automotive, aerospace, and energy industries, 4340 alloy steel is used in such products as shafts, axles, and drilling components.

Requirement Specifications we can meet:

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

Shapes Available

  • Rounds
  • Square
  • Hexagon
  • Rounded Cornered Square
  • Flats
  • Please give as much detail as you can and a King Steel representative will contact you shortly to help you.
  • Max. file size: 50 MB.

Hot Rolled Steel Properties

Chemical Properties
Iron 95.855 – 96.98
Nickel 1.65 – 2.00
Manganese 0.450 – 0.650
Chromium 0.400 – 0.600
Molybdenum 0.200 – 0.300
Carbon 0.170 – 0.220
Silicon 0.150 – 0.300
Sulfur (max) 0.040
Phosphorous 0.0350

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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