440F Free-Machining Stainless Steel Round Bar: 440F is a sulfur-modified high-carbon martensitic stainless alloy for selected machined components. It is not interchangeable with 440C where high-hardness wear or polished surfaces are critical.
Download Mozaic 440F Free-Machining Stainless Steel Round Bar reference PDF
440F Free-Machining Stainless Steel Round Bar — Technical Specification Overview
| Property | Material or specification details |
|---|---|
| Material designation | 440F Free-Machining Stainless Steel Round Bar |
| Chemical / alloy identity | High-carbon, sulfur-modified chromium stainless; verify exact grade/UNS |
| Specification to confirm | Customer-specified ASTM bar grade and acceptance standard |
| Supplied condition | Annealed or hardened and tempered as ordered |
| Representative parts | Automated-lathe wear parts, precision mechanical shafts and fasteners |
| Processing requirements | Finished bar OD, surface roughness, straightness, length and heat/lot traceability determined per purchase order |
Illustrative reference only. The exact edition of the purchase standard, product form, supply condition and mill test report govern material acceptance.
Selection, Properties and Applications
440F and 440C differ in machinability, corrosion and finishing performance; substitutions require approval.
Common applications include automated-lathe wear parts, precision mechanical shafts and fasteners. The correct steel grade depends on operating environment, hardness or corrosion criteria, machining requirements, and traceability. An engineer should approve any alternative material designation and required temper before production.
Centerless Ground Bar and Processing
Mozaic Precision Metals can review 440F Free-Machining Stainless Steel Round Bar sourcing and precision centerless grinding, polishing, straightening, saw cutting and packaging. Service capability depends on bar diameter, length, condition, starting material and tolerances. Requirements for straightness, roundness, finished diameter and surface finish should be separately specified, not assumed to share one universal tolerance.
Related Material Grades
- 440C stainless steel — compare chemistry, condition and suitability before substituting
- 416 stainless steel — compare chemistry, condition and suitability before substituting
Request a Material Quote
Please identify the exact grade, product standard/revision, annealed or heat-treated condition, starting and final OD, bar length, quantity, surface and inspection criteria, and certificates needed. Request a quote from Mozaic, email sales@mozaicprecision.com, or call 847-637-8379.