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

41L40 Round Steel Bar

A leaded version of 4140 developed to improve machining productivity in alloy-steel production parts.

Purchase to your specification

41L40 for production and repeat supply.

Buying 41L40 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 41L40 material profile ↓

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Your 41L40 requirement

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

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41L40 Round Bar: Material Profile

41L40 retains the general strength and heat-treatment capability associated with 4140 while lead additions improve chip control and tool life.

Its use should be checked against welding, elevated-temperature, regulatory, and end-customer restrictions before 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

Improved alloy-steel machinability
Good hardenability
High strength potential
Good wear resistance

Common Applications

Machined shafts
Hydraulic components
Couplings and fittings
High-volume alloy-steel 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.