services
Polishing Service
Polishing, let the luster bloom, the details achieve perfection – bring mirror-like brilliance to the surface of your product, release extraordinary charm! AFI Industrial Co., Ltd. to provide customers with polishing surface treatment services!
Get A Quick ReplyMetal Polishing Services with AFI
Metal polishing is a precision surface finishing process that enhances both the aesthetic and functional properties of metal parts. Engineers and designers choose polished finishes to reduce surface roughness, remove oxidation, and achieve specific reflectivity levels—especially for high-visibility components, medical devices, and decorative hardware.
AFI’s online polishing services provide a fast and cost-effective solution for any parts that require superior surface quality based on 3D CAD files or engineering drawings. AFI offers a range of polishing capabilities for materials including stainless steel, aluminum, copper, and brass, as well as specialized treatments like mirror finishing, satin brushing, and buffing. With a network of domestic and overseas facilities, AFI Parts can supply any quantity of polished parts, from low-volume, high-mix prototypes to high-volume production runs. AFI Parts offers competitive, custom pricing for all projects, and your price for prototypes includes tariffs and shipping for standard parcels.
AFI Metal Polishing Capabilities
| Feature | Description |
|---|---|
| Max Part Size | Up to 5’ x 10’ (1.52 m x 3.05 m). We accommodate larger part volumes upon request. |
| Standard Lead Time | 3 business days |
| Surface Roughness (Ra) | 4 to 125 micro-inches typical. We can achieve ultra-fine mirror finishes or specific grit textures upon request. |
| Precision Uniformity | We offer surface consistency as tight as +/- 0.005″. Tighter tolerances for material removal are available upon manual review. |
| General Standards | See our Polishing & Finishing standards for details on reflectivity levels and surface quality grades. |
| Mirror Polishing | Capacity for parts up to 14’ in length for high-luster, distortion-free reflective finishes. |
| Satin & Brushing | Consistent directional textures (e.g., #4 Brushed Finish) applied across the entire component surface. |
| Edge Treatment | Precision deburring and edge rounding for parts with 2” diameter holes or larger upon request. |
| Weld Blending | Expert smoothing and blending of welded edges, seams, and assemblies to ensure a seamless final appearance. |
What is Metal Polishing?
Metal parts are often produced with raw, oxidized, or uneven surfaces that require refinement through a series of progressive abrasive steps. For a typical polishing project, the first step is grinding, where coarse abrasives or belts are used to remove heavy scratches, mill scale, and surface imperfections. This process is essential for preparing the metal for higher-quality finishes.
Once the surface is leveled, the next step is to refine the texture using various tools, most commonly buffing wheels and specialized compounds. A power-driven tool uses dedicated pads to create a desired luster, transforming a dull surface into a reflective one. This treatment can be applied to multiple surfaces and complex geometries, creating everything from a uniform brushed (satin) finish to a high-gloss mirror effect, which may require manual hand-detailing for intricate areas. Once the parameters are set, processing large batches is highly efficient. This makes metal finishing ideal for both high-end prototypes and high-volume production.
How AFI Metal Polishing Works?
AFI makes professional metal finishing simple. Just upload your part design and surface specifications to our platform to get started. We automatically calculate pricing and lead times for virtually endless finish configurations, including specific Ra (Roughness Average) requirements, mirror finishes, and custom brushing patterns. When you place your order, we utilize our diverse finishing network to find the right specialist for the job. In a matter of days, your custom polished parts will be delivered to your door.
AFI’s expertise in a wide range of materials and post-processing solutions allows you to obtain parts suitable for any application. We serve the aerospace, medical (surgical instruments), food processing (hygienic surfaces), construction, and high-end consumer electronics industries.
Polishing Materials Available at AFI
Aluminum 1100-H14
Aluminum 5052-H32
Aluminum 6061-T6
Copper 101
Copper C110
Bronze 220
Bronze 510
Stainless steel 301
Stainless steel 304
Stainless Steel 304 #4 brushed
Stainless Steel 304, #8 mirror polish
Stainless steel 316/316L
Stainless Steel 316, #4 brushed
Steel 1018 (Low Carbon)
Steel 1045 (Hot Rolled)
Steel A569/ASTM A1011 (Hot Rolled)
AZ55 Galvalume
A653 Galvanized
1095 Spring Steel
Steel A36
Steel A36, pickled and oiled
Steel A366/1008
Inconel 625
Nickel Alloy 200
Nickel Alloy 400
Titanium (Grade 2)
Titanium 6AI-4V (Grade 5)
Glass & Ceramics
Minerals: Jade, Gemstones, and Natural Stone
Wood & Composites
Available Metal Polishing Finishes
Various polishing grades and surface finishes are available for an instant online quote. If you do not see the specific surface roughness (Ra) or luster level combination you are looking for, please choose “Other” under the finish drop-down on your quote page and submit for an expert engineering review once you have specified your required reflectivity, tolerances, inspection needs, and quantities.
Basic deburring and surface cleaning with no specific luster requirements.
Unidirectional grain created with 120-180 grit abrasives; ideal for architectural and food equipment.
Highly reflective, distortion-free finish achieved through fine abrasive steps and buffing.
An electrochemical process that removes a microscopic layer for a bright, ultra-clean, and passive surface.
Batch polishing in media for uniform surface smoothing and edge rounding on smaller parts.
High-efficiency polishing for cylindrical parts, tubes, and rods.
Non-contact surface brightening for complex internal geometries that mechanical tools cannot reach.
Extreme precision polishing for flatness and mirror-like smoothness in high-pressure seals.
Get In-Depth Tips With Our Design Guide
Get GuideMetal Polishing & Finishing Guidelines
| Feature | Description (MT = Material Thickness / RA = Roughness Average) |
|---|---|
| Minimum Surface Roughness | 0.05 μm RA (Mirror Finish) |
| Minimum Material Removal | 0.02mm – 0.05mm per side |
| Edge Rounding Radius | 0.2X MT (to prevent burr buildup) |
| Blind Hole Depth Limit | 2X Hole Diameter (for uniform internal finish) |
| Complex Geometry Access | 10mm minimum clearance for polishing wheels |
| Uniformity Tolerance | ±10% of target RA value |
| Heat Affected Zone (HAZ) Depth | 1X MT (must be removed prior to high-buffing) |
| Post-Polishing Passivation | Required for Stainless Steel (ASTM A967) |
Applications and Advantages of Surface Polishing
Enhanced Aesthetics
It can transform rough surfaces into a mirror-like shine or a refined satin finish. It eliminates surface imperfections, scratches, and dullness, giving products a high-end visual effect, and is suitable for luxury consumer goods and architectural hardware.
Corrosion Resistance
It improves the oxidation and corrosion resistance of materials by removing surface contaminants and reducing microscopic surface area. This makes it an essential process for medical, marine, and food-grade components.
Precision Finishing
It ensures stringent dimensional accuracy and an ultra-smooth surface roughness (Ra value). It also achieves low friction and high cleanliness, making it ideal for industrial molds and high-performance mechanical parts.
Ready to Get a Professional Polishing Quote?
Free surface evaluation available for bulk finishing orders!
Get Your Instant QuoteWhy Choose AFI Parts for Custom Polishing?
Endless Options
Choose from millions of possible combinations of materials, finishes, tolerances, markings, and certifications for your order.
Easy to Use
Get started with our easy-to-use platform and let our experts take care of managing the project from locating the right manufacturing partner to delivery logistics.
Vetted Network
We are ISO 9001:2015, ISO 13485, and AS9100D certified. Only the top shops that apply to become suppliers make it through our qualification process.
我们获得了 ISO 9001：2015、ISO 13485 和 AS9100D 认证。