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

4135 Round Steel Bar

A medium-carbon chromium-molybdenum alloy offering strength, toughness, and through-hardening capability.

Purchase to your specification

4135 for production and repeat supply.

Buying 4135 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 4135 material profile ↓

Quote Desk

Your 4135 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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4135 Round Bar: Material Profile

4135 falls between 4130 and 4140 in carbon level and may be selected where a particular balance of weldability, strength, and heat-treatment response is required.

The governing specification, condition, mechanical properties, and any ultrasonic or cleanliness requirements should accompany 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

Good strength and toughness
Responsive to heat treatment
Good fatigue resistance
Alloy hardenability

Common Applications

Shafts and axles
Forged components
Pressure and oilfield parts
High-load 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.