Large Stainless Steel Spheres
3000mm Mirror Polished Stainless Steel Sphere
- Thickness:0.6mm to 4MM
- Size Range:6mm to 4000MM
- Invisible welding seams
- Finish:Mirror polish,Mill finish,Brush,Electroplating,Powder coating, sandblasting,etching,Silk printing
Send a drawing or a photograph on WhatsApp or by email and we will quote against it. No form to fill in.
Product Overview
What This Piece Is
we capable of producing metal Balls to almost any size meet your specification. hollow steel balls in diameter from 19mm to 4000mm in diameter are available with a wall thickness from 0.6mm to 6mm
We can supply AIS 201 / 304 / 316 stainless steel hollow steel balls. Production method: mould pressing and water pressure
is welding steel sheet with man-hand. Our technicians will calculate the specific data for the welding sheet,then bending the leaf shape, our qualify workers will weld asimilar spherical cube shape. and then forming a perfect spherical balls with perfect water pressure. Finally we’ll grind the welding seam and mirror polishing it.
is shape steel sheet by deforming it with a mould. then welded two steel hemispheres together and grinding the welding seams. finally mirror polishing the hollow steel balls. we can make from 5mm to 500MM.Thickness available from 0.6mm to 6mm. we offer drilling and tapping service according to your demand.
None Standard mould limit,Any size can be made.
Spinning(thickest steel balls option)
Who It Is For
- Sculptors, studios and art consultants
- Architects and landscape architects
- Property developers and public realm teams
- Garden centres, retailers and landscape contractors
Problems It Solves
- A diameter or wall thickness that no distributor stocks
- Thin imported balls that dent in transit and dull within a season
- A weld line that shows in the reflection
- No mounting detail, so fixings are improvised on site
Key Benefits
Why Buyers Specify This Product
A Reflection That Stays Whole
Weld seams are ground and re-polished until a straight line reflected across the surface does not break in two, which is the difference between a sculpture and a divided mirror.
Built to Your Size, Not to a Die
Water pressure forming has no standard die limit, so the diameter comes from your drawing rather than from the tooling a supplier happens to own.
Grade Matched to the Location
316 and 316L are specified for coastal cities, marine air and acid rain regions where 304 would be attacked. Indoor work is quoted in 304.
Mounting Detail Made With the Piece
Base plates, support posts, drilled and tapped holes and fixing centres are fabricated with the work rather than improvised on site.
One Supplier From Drawing to Freight
Our 3D drawing team develops the panels, the workshop forms and finishes the piece, and express, air or sea freight is arranged from here.
Application Scenarios
Where This Product Is Installed
The same piece behaves differently indoors, on a coast and in a fountain basin. These are the settings we build for most often.
Civic plazas and parks
Free standing mirror spheres and sphere groups placed as a focal point on lawn, gravel or paving.
Garden and courtyard fountains
A sphere sitting on a pedestal tube with water flowing across the mirror surface.
Technical Features
Specifications and Capability
Figures below combine what this listing states with the full capability range of the workshop, so you can see immediately whether a variant of this piece is possible.
- Size in this listing
- 3000 mm
- Available diameter range
- 19 mm to 5000 mm, built to your drawing
- Grade referenced
- AISI 316, AISI 304, AISI 201
- Grades available
- AISI 201, AISI 304, AISI 316, AISI 316L
- Wall thickness range
- 0.6 mm to 6 mm
- Materials
- Stainless steel, carbon steel, brass, copper, aluminium, corten steel
- Finishes
- Mirror polish, Mill finish, Brushed, Electroplating, Sandblasting, Etching, Silk printing, Spray painted RAL colour
- Forming methods
- Water pressure forming, mould pressing, spinning
- Weld seams
- Ground back and re-polished so the reflection runs unbroken
- Customisation
- Drilling and tapping, laser cut patterns, perforation, sandblasted logos, base plates, water feature pipework
- Made in
- Shenzhen, Guangdong, China
Materials
- Stainless steel 201 / 304 / 316 / 316L
- Carbon steel and mild steel
- Brass
- Copper
- Aluminium
- Corten weathering steel
Customisation Options
- Any diameter to your drawing, with no die limit
- Drilling and tapping to your hole pattern
- Laser cut designs and perforated surfaces
- Sandblasted or etched logos and artwork
- Continents added for a world globe
- Sprayed RAL colour with printed patterns under the topcoat
- Support post and base plate for fountain mounting
Manufacturing Process
How It Is Made
Water Pressure Forming
Technicians calculate the exact developed size for each steel sheet, the sheet is bent into leaf shapes, welded into an approximate spherical cube and then expanded into a true sphere under water pressure. Weld seams are ground off and the surface is mirror polished. There is no standard die limiting the size, so any diameter can be built to a drawing.
Best for: Large and giant spheres, one-off commissions, sizes with no existing tooling
Mould Pressing
Sheet is deformed against a mould, two hemispheres are welded together, the weld seam is ground back and the ball is polished or brushed. Available from 5 mm to 500 mm diameter with 0.6 mm to 6 mm wall thickness, with drilling and tapping to your drawing and invisible weld seams.
Best for: Repeat batches of small and medium balls, gazing balls, drilled and tapped balls
Spinning
Two hemispheres are metal spun and then welded together, ground and polished. This is the route that produces the thickest wall sections we offer.
Best for: Heavy wall spheres and hemispheres, structural or high impact locations
Quality Control
How the Surface Is Judged
Surface Uniformity
A polished surface is judged on whether reflected light is even across the whole ball rather than dark in low lying areas, whether the reflected object stays sharp, and whether it distorts.
Weld Seam Treatment
The weld line is where two panels meet and is the hardest area to finish. If it is not treated correctly the piece reads as a divided mirror and a straight reflected line breaks into two parts, so seams are ground and re-polished until the reflection runs through unbroken.
Material Selection
304 is used for indoor work. For coastal cities and acid rain regions 316 is specified because of its higher corrosion resistance, and we recommend 316 for outdoor sculpture generally. We do not recommend 201 for sculpture work.
We publish the inspection criteria we use rather than a certification badge we cannot evidence.
Comparison
How This Compares With Other Production Routes
| Method | Size range | Thickness | What it gives you | Best suited to |
|---|---|---|---|---|
| Water pressure forming | 19 mm to 5000 mm | 0.6 mm to 6 mm | No die limit, so any diameter can be built | Large spheres and one off commissions |
| Mould pressing | 5 mm to 500 mm | 0.6 mm to 6 mm | Repeatable geometry, invisible seams, drilling and tapping available | Batches of small and medium balls |
| Spinning | Hemisphere based | Thickest wall option | Heaviest sections we produce | Impact exposed and structural pieces |
| Stamping press hemisphere | Φ20 mm to Φ700 mm | 0.6 mm to 3 mm | Consistent batch geometry | Repeat hemisphere and dome components |
| Welded assembled hemisphere | Φ200 mm to Φ3500 mm | 0.6 mm to 3 mm | Large domes with invisible seams | Architectural domes and wall arrays |
Use Guide
Installing and Looking After It
Spheres can sit directly on lawn, gravel or paving, or be mounted on a granite or fabricated steel base. Base plates are made to the fixing centres of the foundation you build. For fountain work the inner pipe, funnel outlet and square base plate are built into the ball.
For daily cleaning use warm water and a cloth, then dry the surface with a towel, because minerals in the water leave marks on stainless steel. A mild neutral cleaning agent removes tough dirt without damaging the surface, and glass cleaner with a microfibre cloth deals with fingerprints. Never scrub a polished ball with a steel wire ball, it leaves scratches that cannot be removed.
Before You Order
- Diameter, or the diameters in the group
- Grade: 304 indoors, 316 or 316L on the coast
- Wall thickness between 0.6 mm and 6 mm
- Finish and, for colour work, the RAL reference
- Mounting: free standing, base plate, post or fountain
- Destination country and site access
Related Products
Other Pieces in Large Stainless Steel Spheres
Related Cases
Projects Using This Type of Work
Related Articles
Background Reading
Process Guide How a Mirror Polished Sphere Is Made
The three forming routes we use, why there is no standard die limiting the diameter, and how the weld seam is made to disappear.
Design Guide Specifying a Sphere for Your Project
The eight things to put on a drawing so a sphere can be quoted, built and installed without a second round of questions.
Shipping and Delivery Options
Express, air and sea options with the transit times we quote against.
FAQ
Questions About This Product
Can this be made in a different size?
Yes. Water pressure forming works without a standard die, so any diameter can be made to your specification between 19 mm and 5000 mm. Send the size you need and we quote against it.
Which stainless steel grade will you use?
AISI 304 for indoor placement and AISI 316 or 316L for coastal cities, marine air and acid rain regions. 316 has better corrosion resistance and durability than 304, and we recommend it for outdoor sculpture. We do not recommend 201.
Will the weld seam show?
No. Seams are ground back and re-polished until a straight reflected line runs across them without breaking. On mould pressed balls the seams are invisible.
Can you add holes, patterns or a logo?
Yes. Drilling and tapping is done to your drawing, spheres can be laser cut with a pattern or perforated with a custom hole layout, and logos or artwork can be sandblasted or etched onto the surface.
What finishes can I choose?
Mirror polish, mill finish, brushed, electroplating, sandblasting, etching, silk printing and sprayed colour in any RAL reference.
How will it be shipped?
Samples and small orders go by air express, usually 5 to 8 days with DHL, UPS, FedEx or Aramex. Medium and urgent orders go by bulk air, around 5 days to your airport. Large orders go by sea, usually 15 to 45 days to your local customs. 7 feet is the largest diameter that ships by conventional freight.
Can you work from my drawing or photographs?
Yes. Our factory has a 3D drawing design team and an in house artist team, and we build from small samples, ideas, 3D drawings or detailed pictures. OEM and ODM commissions are welcome.
Next Step
Get A Quote For This Piece
Send the diameter, grade, finish and destination and you will have a price and a lead time. Drawings and photographs are welcome on WhatsApp or by email.