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

4130 Round Steel Bar

A chromium-molybdenum alloy with good strength, toughness, heat-treatment response, and weldability in the proper condition.

Purchase to your specification

4130 for production and repeat supply.

Buying 4130 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 4130 material profile ↓

Quote Desk

Your 4130 requirement

Add your requirement or attach an RFQ.

Company

Material / Grade

Size / Length

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

Unit *

Quantity covers *

Order Requirements

Buying for *

Order pattern *

Attach your RFQ or drawingOptional

PDF, spreadsheet, document, image, or CAD. Up to 4 files; 10 MB each, 20 MB total.

Optional: share hashed email/phone details and whether this inquiry becomes a qualified opportunity with Google to measure our advertising. Your choice does not affect your quote. Privacy details.

Our sales team reviews the requirement and follows up by email.

Private RFQ: Details and attachments are available only through authorized staff access. Privacy notice.

4130 Round Bar: Material Profile

4130 is used for structural and mechanical components where strength without excessive weight matters.

Supply condition, welding procedure, heat treatment, and mechanical properties must match the governing 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 strength and toughness
Responsive to heat treatment
Good fatigue resistance
Good fabrication range

Common Applications

Shafts and structural parts
Aircraft and transportation components
Roll cages and frames
Oilfield and 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.