Commercial Production · Alloy Steel · Nickel-Chromium-Molybdenum Alloy Steel Bar

8740 Round Steel Bar

A medium-carbon alloy used for high-strength, heat-treated parts requiring toughness and resistance to fatigue.

Purchase to your specification

8740 for production and repeat supply.

Buying 8740 for machining, forging, or component production? Send your dimensions, condition, and quantity per order. For repeat supply, include annual usage and release timing, or attach your existing RFQ.

Size & supply condition: State the diameter, length, and required condition. We confirm the available supply route against your order.
Finished to your requirement: Include production cutting, surface finish, tolerances, and any required heat treatment. Processing is reviewed with the material requirement.
Documentation & delivery: Specify mill certifications, testing, traceability, delivery date, and ship-to location so they can be included in the quote.

A grade name is the starting point. The governing specification, condition, dimensions, and testing define the material to be quoted.

Read the 8740 material profile ↓

Quote Desk

Your 8740 requirement

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Material / Grade

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Quantity / WeightCommercial requirements from 3,000 lb through truckload quantities.

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8740 Round Bar: Material Profile

8740 provides broad hardenability and balanced strength for shafts, fasteners, and forged components.

Include the size, condition, mechanical properties, heat-treatment status, surface limits, and certification with the RFQ.

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.

Key Characteristics

High strength potential
Good hardenability
Good toughness
Good fatigue resistance

Common Applications

High-strength bolts
Shafts and axles
Forged aircraft parts
Heavy-duty machinery 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.