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

8630 Round Steel Bar

A medium-carbon alloy steel offering good hardenability, toughness, and strength for loaded mechanical parts.

Purchase to your specification

8630 for production and repeat supply.

Buying 8630 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 8630 material profile ↓

Quote Desk

Your 8630 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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8630 Round Bar: Material Profile

8630 is used where a through-hardened alloy needs to withstand impact and repeated loading.

It may be supplied annealed, normalized, or heat treated to the applicable specification.

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

Good hardenability
Good toughness
Good fatigue resistance
Responsive to heat treatment

Common Applications

Shafts and axles
Gears and couplings
Oilfield components
Heavy-equipment 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.