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

9310 Round Steel Bar

A premium case-hardening alloy used for highly loaded gears and components requiring exceptional core toughness and fatigue strength.

Purchase to your specification

9310 for production and repeat supply.

Buying 9310 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 9310 material profile ↓

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9310 Round Bar: Material Profile

9310 combines substantial nickel with chromium and molybdenum for deep hardenability and strong performance after carburizing.

Aerospace or bearing-quality orders may require controlled melt practice, cleanliness, ultrasonic inspection, grain size, and detailed heat-treatment certification.

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

Exceptional core toughness
Excellent carburizing response
High fatigue strength
Deep hardenability

Common Applications

Aircraft gears
Critical pinions and shafts
High-load bearings
Defense and racing drivetrain 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.