Stainless Steel Mechanical Finish
Bead Blasted Stainless Steel Finish
Specifications, Supply & Technical Guide
Bead blasted stainless steel finish is a uniform, low-glare matte or satin surface produced by blasting the stainless face with fine spherical media under controlled conditions. The final texture depends on the media type and size, blasting pressure, angle, stand-off distance, number of passes and the starting surface, so the finish should be approved by sample and measurable criteria where appearance is critical.
Illustrative Bead-Blasted Surface
BEAD
Illustrative visual reference only. Actual bead-blasted appearance can vary with media composition, media size, blasting pressure, angle, distance, coverage, substrate condition and cleaning route. Use a real approved sample for appearance-critical projects.
Finish Definition
What is a bead blasted stainless steel finish?
Bead blasting is a mechanical surface-finishing process in which fine spherical media impacts the stainless steel surface to produce a more uniform, diffuse and low-glare appearance.
Common process media may include glass bead, ceramic bead or other controlled non-ferrous / stainless-compatible blasting media selected for the required finish and contamination-control needs.
Unlike directional brushing, the finish is generally non-directional or much less directional. Unlike aggressive angular-abrasive sandblasting, bead blasting is usually selected for a softer, more uniform matte texture rather than deeper cutting of the surface.
The finish name alone does not define one universal Ra / Rz, color, gloss or defect limit. Media, pressure, distance, angle and coverage should be controlled when repeatability matters.
Define these points before approving a bead-blasted finish
- Stainless steel grade and starting surface
- Blasting media type and nominal media size
- Pressure, angle, distance and coverage / passes
- Ra / Rz range when measurable roughness is critical
- Reflectivity / color / tone tolerance where applicable
- Approved sample and finish-limit reference
- Post-blast cleaning, protection and defect acceptance
Finish Evidence
Technical and application evidence for bead-blasted finish approval
The page keeps the image count to three total. Replace the technical and application placeholders below with real production evidence before final technical sign-off.
Technical evidence image
Use one combined image showing the actual bead-blasted surface under controlled light, the approved sample, media / process reference and Ra / Rz reading where required.
Application image
Use one real panel, enclosure, interior component or fabricated part where the bead-blasted matte surface is visible in the final supplied condition.
Supply Specification
Bead blasted stainless sheet, plate, panel and fabricated-part ordering matrix
Define the grade, starting surface, finished side, blasting media, visual sample, measurable roughness and protection method together. This is an RFQ checklist, not live inventory.
Specify grade, thickness, dimensions, finished side, media and approved sample.
Add panel orientation, visible area, tone uniformity and handling requirements.
Provide drawings, masked areas, final blasting zones and cleaning requirements.
| Supply Form | Required Order Data | Bead-Blasted Surface Control | Processing / Delivery Notes |
|---|---|---|---|
| Sheet | Grade, thickness, width, length, quantity, tolerance and finished side | Media, Ra/Rz if required, approved sample and defect limits | Confirm film / interleave, edge protection and packaging |
| Plate / Panel | Grade, thickness, dimensions, quantity, flatness and visible areas | Control tone, texture, coverage and panel-to-panel consistency | Use approved limit samples for large visible installation areas |
| Cut / Formed Blank | Grade, thickness, blank dimensions, drawing and visible surface | Define whether final bead blasting occurs before or after forming | Protect / mask surfaces through downstream fabrication as required |
| Fabricated Part | Drawing, grade, dimensions, quantity and finish zones | Define weld-area blending, masking, final blast and sample criteria | Confirm post-blast cleaning and protection before shipment |
Availability, dimensional limits, media options and achievable visual / roughness consistency must be confirmed in the quotation.
Finish Selection
Bead blasted vs sandblasted vs brushed vs satin stainless steel finish
Bead blasting is selected for a diffuse, low-glare, usually non-directional matte surface. Sandblasting, brushing and satin finishing can produce different texture, roughness and directional appearance.
| Finish | Visual Character | Process Character | Selection Logic | Specification Note |
|---|---|---|---|---|
|
Bead Blasted
This Page |
Uniform matte / satin, low glare | Spherical-media blasting | When diffuse, soft matte appearance is required | Specify media + process + sample + Ra/Rz if critical |
| Sandblasted | More aggressive matte / textured appearance | Often uses angular abrasive media | When stronger surface cutting / texture is required | Can produce higher roughness than bead blasting |
| Brushed | Visible directional grain | Mechanical abrasive brushing | When linear decorative texture is desired | Directionality is fundamentally different |
| Satin | Low-gloss refined appearance | Project / supplier-specific finishing route | When the visual target is satin but the route is not bead blasting | Do not assume “satin” automatically means bead blasted |
Processing Route
Typical production route for bead blasted stainless steel
A repeatable finish requires controlled preparation, clean blasting media, stable process settings, consistent coverage and proper post-blast cleaning.
Prepare the Surface
Remove oils, fabrication residue and contamination before blasting.
Select Clean Media
Use approved spherical media suitable for stainless-steel finishing.
Controlled Bead Blasting
Control pressure, angle, distance, traverse speed and number of passes.
Ra / Rz Verification
Measure surface roughness where project acceptance requires it.
Post-Blast Cleaning
Remove residual media and process contamination using the approved route.
Inspect & Protect
Check tone / texture against the sample and protect the final surface for delivery.
Surface Control
Roughness, blasting route, visual tolerance and cleaning guidance
Do not publish invented Ra/Rz or capability ranges. The approved process and actual production measurements should control any project-specific numeric values.
Ra / Rz & Production Route
Bead blasting can change surface roughness, but the result depends strongly on the starting surface and blasting parameters.
- Ra target: specify when required
- Rz target: specify when required
- Media type / size: define or approve by sample
- Pressure, angle, distance and passes: control for repeatability
Reflectivity, Color & Defect Acceptance
The surface should appear uniformly diffuse, but tone can vary with alloy, substrate and blasting route.
- Define reflectivity / gloss where critical
- Use controlled-light comparison for tone consistency
- Set overlap, streak, shadow and uneven-blast criteria
- Use a finish-limit sample for visual acceptance
Grades, Protection & Cleaning
Confirm compatible grades, product forms and process limits through the quotation. Post-blast cleaning and handling are important because matte surfaces can retain residues more readily than smooth polished surfaces.
- Grade / form: confirm by quotation
- Protective film: confirm compatibility with the matte surface
- Remove residual blasting media after finishing
- Use cleaners suitable for the grade and final application
Application Guidance
Where is bead blasted stainless steel used?
Bead-blasted stainless is useful where a diffuse, low-glare and more uniform non-directional appearance is preferred over brushed grain or high reflectivity.
Architectural Panels
Visible stainless surfaces requiring a controlled matte, low-glare appearance.
Elevator / Interior Components
Selected panels and trims where a non-directional satin texture is preferred.
Equipment Enclosures
Housings and covers requiring a uniform industrial matte stainless finish.
Decorative Components
Custom fabricated parts where reduced glare and consistent texture are design requirements.
Food / Process Equipment
Project-specific components where the approved roughness, cleaning route and service requirements are compatible with a blasted finish.
Custom Fabricated Parts
Drawing-controlled parts requiring defined blasting zones, masking and final visual acceptance.
Standards & Equivalence
How to specify bead blasted stainless steel without ambiguity
Bead blasted is generally a project-defined mechanical finish, not one universal ASTM numbered finish. Use the base-material standard together with a separate blasting-process and surface acceptance specification.
- Base stainless product specification Specify the governing stainless grade, flat-product / part standard, dimensions and incoming surface before blasting.
- Blasting-process specification Define media type, size, process controls, masking and cleaning requirements when repeatability matters.
- Ra / Rz requirement Add measurable roughness limits, measurement method and location where the application requires them.
- Visual approval Use a controlled-light approved sample / limit sample to control tone, texture, overlap marks and uniformity.
Do not treat bead blasted and sandblasted as automatically equivalent.
Bead blasting generally uses spherical media to create a softer, more uniform matte surface. Sandblasting may use more angular abrasive media and can create a more aggressive texture.
The finish name does not define chemistry, mechanical properties, dimensions, one universal Ra/Rz, color or complete defect criteria.
For critical visible work, approve the media / process, production sample, inspection lighting and cleaning route before releasing the full order.
Technical FAQ
Bead blasted stainless steel finish FAQ
What is a bead blasted stainless steel finish?
Is bead blasted stainless steel the same as sandblasted stainless steel?
What is the typical bead blasted surface roughness?
Is bead blasted stainless steel directional?
What blasting media can be used on stainless steel?
Does bead blasted stainless steel need cleaning after blasting?
Can bead blasted stainless steel use protective film?
What information should be included in a bead blasted stainless steel RFQ?
Related Resources
Continue your stainless steel specification
Technical Evidence & Review
Data sources and document control for this bead-blasted finish page
Required evidence sources
- Ra / Rz values should come from actual measurement records when roughness is controlled.
- Media type, size and blasting route should match the actual production specification.
- Visual tolerance should use controlled-light close-ups and an approved / limit sample.
- Compatible grades, forms, cleaning, protection and processing claims should match current quotation capability.
- Application images should be real project, production or permission-cleared evidence.
Document control
Technical Quote
Request a technical quote for bead blasted stainless steel
Send the grade, dimensions and bead-blasted surface target together. For appearance-critical work, include an approved sample or reference image and define media, roughness and visual acceptance requirements.
- Stainless steel grade
- Sheet, plate, panel or fabricated part
- Thickness × width × length
- Required quantity
- Starting surface / mill finish
- Blasting media + finished side
- Ra / Rz / visual limits if required
- Post-blast cleaning / protection requirement
- Destination, due date and inspection needs