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Assorted round steel bar stock

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Alloy Steel · Nickel-Chromium-Molybdenum Alloy Steel Bar

4320 Round Steel Bar

A low-carbon alloy steel developed for carburized components requiring a hard surface and tough core. Request Pricing

4320 Round Bar: Material Profile

4320 combines nickel, chromium, and molybdenum for deep hardenability, impact resistance, and fatigue performance after case hardening.

The order should define the governing specification, condition, case requirements, and mechanical properties.

Purchase to the controlling ASTM, SAE, AMS, or customer specification. Section size, supply condition, mechanical properties, surface limits, testing, and heat/lot traceability can change the acceptable material and processing route.

Product form Round bar; other long-product forms by inquiry
Condition Hot rolled, cold finished, annealed, or heat treated as required
Quote details Specification, size, condition, quantity, testing, and delivery

Key Characteristics

  • Excellent case-hardening response
  • High core toughness
  • Good fatigue resistance
  • Deep alloy hardenability

Common Applications

  • Aircraft and automotive gears
  • Pinions and shafts
  • Heavy-duty bearings
  • Power-transmission components

Specification Requirements

Identify the governing specification and revision, product form, section size, condition, mechanical properties, testing, and certification requirements. The purchase specification and material certification govern the order.

Request a Quote for 4320 Round Bar

The material field is prefilled with 4320 and remains editable. Add the specification, size, condition, quantity, processing, testing, required date, and ship-to location.

Premium Steel Sales
Ohio Bar & Metal Co. is the round bar division of Premium Steel Sales LLC.

Premium Steel Sales handles customer setup and invoicing. Flat-rolled carbon and coated steel can be quoted through the same sales contact.

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