8620 Alloy Steel Round Bar: 8620 is a low-carbon nickel-chromium-molybdenum alloy steel commonly specified for carburized components with a hard case and relatively tough core.
Download Mozaic 8620 Alloy Steel Round Bar technical reference PDF
8620 Alloy Steel Round Bar — Technical Overview
| Specification item | Reference or order requirement |
|---|---|
| Grade or product | 8620 Alloy Steel Round Bar |
| Material designation / identity | SAE/AISI 8620 / UNS G86200; Ni-Cr-Mo carburizing steel |
| Specification to review | ASTM A29/A29M or drawing-defined aircraft/industrial specification |
| Delivery/heat-treatment condition | Annealed before machining or carburized/hardened after controlled treatment |
| Examples of applications | Gears, splines, shafts and precision transmission components |
| Quotation and inspection | Provide OD, length, finished tolerance, surface finish and heat-lot documents |
Engineering reference, not a mill test report. Actual chemistry, properties, condition, availability and qualification must meet the ordered product specification and accompanying certification.
Material Properties, Typical Parts and Selection
Case depth, surface hardness, core strength and post-treatment grind allowance must be specified. Representative applications include gears, splines, shafts and precision transmission components. Suitability depends on the environment, grade, geometry, strength/temper and processing route. Specify finished-size and material performance separately; two alloys with similar commercial names may have different test standards.
Precision Grinding, Straightening and Bar Finishing
Mozaic Precision Metals supports project-specific bar sourcing and centerless grinding, straightening, polishing, cutting, chamfering and packaging. Describe the incoming and finished OD, bar length, drawing requirements, production quantity and material traceability. Surface roughness, diameter tolerance and straightness are independent acceptance characteristics, and actual capability is confirmed by quote.
Related Grades and Application Alternatives
- 4340 steel — related but not automatically interchangeable
- 4140 round bar 2 — related but not automatically interchangeable
Common Buyer Questions
What condition must be specified for 8620 Alloy Steel Round Bar?
Annealed before machining or carburized/hardened after controlled treatment. If the condition is not on the drawing, request the engineer’s confirmation before ordering or machining.
Are nearby grades automatic equivalents?
No. Case depth, surface hardness, core strength and post-treatment grind allowance must be specified. Mechanical-property and chemical compliance must be verified against the applicable specification and mill certification.
Request a Quote
Email sales@mozaicprecision.com, call 847-637-8379, or request pricing and availability online.