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Alloy Steel · Chromium-Molybdenum Alloy Steel Bar

4145 Round Steel Bar

A higher-carbon chromium-molybdenum alloy used for strong, wear-resistant, heat-treated components. Request Pricing

4145 Round Bar: Material Profile

4145 provides more hardness potential than lower-carbon 41XX grades while retaining alloy toughness and hardenability.

Orders typically state a heat-treated condition and mechanical-property range.

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

  • High strength potential
  • Good hardenability
  • Wear resistance
  • Good fatigue performance

Common Applications

  • Heavy-duty shafts
  • Oilfield components
  • Gears and couplings
  • High-load machinery parts

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 4145 Round Bar

The material field is prefilled with 4145 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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