Commercial Production · Alloy Steel · High-Carbon Chromium Bearing Steel Bar

52100 Round Steel Bar

A high-carbon chromium steel used for bearings and precision wear components requiring hardness and rolling-contact fatigue resistance.

Purchase to your specification

52100 for production and repeat supply.

Buying 52100 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 52100 material profile ↓

Quote Desk

Your 52100 requirement

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

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52100 Round Bar: Material Profile

52100 is commonly supplied in a spheroidize-annealed condition for machining before final hardening.

Bearing-quality applications may require strict cleanliness, carbide distribution, decarburization, surface quality, and testing provisions.

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

Very high hardness potential
Excellent wear resistance
High rolling-contact fatigue strength
Good dimensional stability with proper processing

Common Applications

Bearing races and balls
Precision rollers
Wear-resistant bushings
High-hardness tooling 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.