Stainless Steel Seamless Double - Colour Hollow Ball Sculpture
Hollow stainless steel spheres with a seamless appearance and two-tone colour finish, fabricated to order in Shenzhen. Wall thickness from 1 mm to 5 mm, diameters from 20 mm to 4000 mm, made from AISI 304 or AISI 316 stainless steel. The double colour effect is achieved through electroplating and polishing, with no visible seam. Designed for architectural, landscape and interior applications where a reflective, custom-coloured sphere is required.
Key Benefits
- Seamless appearance achieved through welding and polishing, with no visible joint in mirror finish
- Double colour finish created via electroplating and polishing, not paint, so it lasts outdoors
- Wall thickness from 1 mm to 5 mm allows weight control for large diameters without sacrificing durability
- Diameters from 20 mm to 4000 mm cover small decorative balls to giant public art installations
- AISI 304 standard, AISI 316 available for coastal or chemically aggressive environments
- Custom colours and finishes matched to your design, with no batch variation in polish
Problems It Solves
- Painted two-tone spheres fade, chip or yellow outdoors; electroplated finish lasts without repainting
- Visible seams in mirror polished spheres break the illusion of a seamless form; welding and grinding hide the joint
- Buying a sphere in two colours from different suppliers leads to mismatched finishes and inconsistent reflectivity
- Large spheres become too heavy to install without lifting plant; hollow construction keeps weight manageable
- Custom colour matching is difficult with standard paint; electroplating gives a consistent, durable finish
- On-site finishing of a mirror sphere damages the surface; all work is done before delivery
Application Scenarios
Public art installations where a large reflective sphere with two distinct colours is a focal point
Landscape features in parks and campuses where a double-colour sphere stands out in planting
Interior lobbies and atriums where a custom-coloured reflective sphere adds visual interest
Architectural details on building facades or entryways where a seamless metal sphere is needed
Garden sculptures where a large hollow ball with a two-tone finish adds depth and contrast
Film and VFX studios needing HDRI reference balls with a custom double colour for lighting
Who It Is For
- Public art commissioners needing a custom double-colour sphere for a site-specific installation
- Landscape architects specifying a reflective, non-painted sphere with a unique colour transition
- Interior designers requiring a seamless, high-reflective ball in a custom two-tone finish
- Film studios sourcing HDRI reference balls with a non-uniform colour for realistic lighting
- Property developers installing a branded or themed sculpture in a residential or commercial complex
- Sculpture installers sourcing a ready-to-mount, custom-finished sphere with no on-site finishing
Technical Features
- Two hemispheres welded and ground to an invisible seam, then polished to mirror finish
- Electroplating applied to create a double colour effect, not paint or coating
- Wall thickness selectable from 1 mm to 5 mm, suitable for small decorative balls to giant public art
- Diameters from 20 mm to 4000 mm, custom sizes possible beyond standard tooling
- AISI 304 standard, AISI 316 available for high-corrosion environments
- Finish options: mirror polished, with double colour via electroplating, no paint or film
Specifications and Materials
| Material | AISI 304 stainless steel, AISI 316 on request |
|---|---|
| Diameter Range | 20 mm to 4000 mm |
| Wall Thickness | 1 mm to 5 mm |
| Forming Method | Welding and seam grinding for seamless appearance |
| Finish | Mirror polished with electroplated double colour |
| Colour | Customisable via electroplating, not paint |
| Secondary Operations | Electroplating, polishing, welding of base or pedestal |
| Lead Time | 30 to 40 days after deposit received |
| Packing | Soft foam inside, sturdy wooden frame or case outside |
| Payment Terms | T/T, 50% deposit and 50% balance before shipping |
| Place of Origin | Shenzhen, China |
| Size Range | Customised to any size |
| Standard Finish | Mirror polished |
| Optional Finish | Electroplating and colour coating |
Materials
- AISI 304 stainless steel, standard for most outdoor and indoor decorative spheres
- AISI 316 stainless steel, specified for coastal sites, pool areas, or high-corrosion environments
- Electroplating base, not paint, for double colour finish that resists fading and chipping
Customization
- Any diameter between 20 mm and 4000 mm, not limited to standard sizes
- Wall thickness selected from 1 mm to 5 mm based on structural and weight needs
- Double colour finish customised via electroplating to match your design
- Base, pedestal or mounting point welded in the exact position required
- Multiple spheres in a set can be finished in the same batch for visual consistency
- Graded sets of different diameters with matching double colour and polish
How It Is Made
- Step 1Sheet cut and blanked to the required diameter and thickness
- Step 2Hemispheres formed by welding and seam ground to an invisible joint
- Step 3Sphere polished through progressive grits to mirror finish
- Step 4Electroplating applied to create the double colour effect
- Step 5Base, pedestal or mounting point welded on if required
- Step 6Protective film applied, foam wrapped, and packed in a wooden frame or case
Quality Control and Use
Quality Control
- Seam inspected under reflected light to ensure no visible joint remains
- Diameter and wall thickness verified before polishing begins
- Electroplated colour checked against sample for consistency
- Final finish inspected under natural light for uniformity and reflectivity
- Photographs of the finished piece sent for approval before shipping
Use Guide
- Specify diameter, wall thickness, colour transition, and mounting position when requesting a quote
- Send the base or pedestal detail so the weld point is in the correct location
- Use AISI 316 if the sphere will be near salt water, pools, or de-icing chemicals
- Keep the protective film on until the sphere is mounted and the site is clean
- Clean with water and a soft cloth; avoid wire brushes or chloride-based cleaners
Compared With The Alternatives
| Alternative | How this product compares |
|---|---|
| Painted two-tone spheres | Electroplated finish lasts outdoors without fading or chipping, while paint wears and peels |
| Seamless cast steel spheres | Hollow construction is lighter and easier to install, but not load-bearing |
| Single colour mirror polished spheres | Double colour adds visual complexity and design flexibility, but requires more process steps |
| Acrylic or GRP spheres | Real specular reflection and no yellowing, but heavier and slower to produce |
Related Products
Stainless Steel SpheresGarden Stainless Steel Ball Sculpture
View Details
Stainless Steel SpheresLarge Stainless Steel Globes Sculpture
View Details
Stainless Steel Half SpheresStainless Steel Hemispheres Half Balls
View Details
Stainless Steel SpheresHollow Stainless Steel Balls Diameter 19 mm to 3000 mm
View DetailsGuides That Help You Specify This
AISI 304 vs 316 Stainless Steel for Outdoor Sculpture
When 304 is enough, when 316 earns the extra cost, and why chloride rather than rain is what actually attacks a polished surface.
How to Choose Wall Thickness for a Stainless Steel Sphere
What 1 mm, 2 mm and 6 mm walls actually change, and why thickness is a handling decision more than a strength one.
Mirror Polishing Explained for Stainless Steel Sculpture
Why the quality of a mirror finish is decided during welding and fixing, long before the piece reaches the polishing shop.
Questions About Stainless Steel Seamless Double - Colour Hollow Ball Sculpture
What is the largest diameter you can make?
4000 mm on custom tooling. There is no fixed step between sizes, so intermediate diameters are available.
How long does it take to deliver?
30 to 40 days after the deposit is received. Larger or complex orders may take longer.
Can I have a custom double colour finish?
Yes. The colour transition is achieved through electroplating, not paint, so it is durable and consistent.
Is the seam really invisible?
Yes. The weld is ground and polished until no visible joint remains in the mirror finish.
How are the spheres packed for shipping?
Soft foam inside, wrapped around the sphere, then packed in a sturdy wooden frame or case.
What are the payment terms?
T/T with 50% deposit and 50% balance before shipping. Photographs of the finished piece are sent before the balance is invoiced.
Get a Price on Stainless Steel Seamless Double - Colour Hollow Ball Sculpture
Send the size, finish and fixing you need and we will come back with a price and a lead time for Stainless Steel Seamless Double - Colour Hollow Ball Sculpture.