4320 Steel Bar

Properties

4320, a low-alloy steel, is distinguished by its superior strength and toughness, achieved by adding nickel, chromium, and molybdenum. This grade is known for its exceptional harden ability and resistance to wear and abrasion, even in severe conditions.

Typically, 4320 steel is used in applications demanding both strength and toughness, such as gears, pinions, and shafts in heavy-duty machinery. It’s commonly chosen for components in the automotive and aerospace industries, where durability under high stress is crucial.

Chemical Properties
Iron 95.85 – 96.98
Carbon 0.17 – 0.22
Manganese 0.45 – 0.65
Chromium 0.40 – 0.60
Nickel 1.65 – 2.00
Molybdenum 0.20 – 0.30
Silicon 0.15 – 0.30
Phosphorus 0.035 (max)
Sulfur 0.040 (max)

Shapes & Sizes Available

  • Rounds
  • Square
  • Round Corner Square
  • Hex
  • Flats

Requirement Specifications we can meet:

  • ASTM A193B7
  • ASTM A320L7/A193B7
  • ASTM A434BC
  • ASTM A449
  • ASTM A354BC
  • ASTM A354BD
  • ASTM A722MOD


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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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