Stainless Steel Hemispheres Half Balls
Stainless steel hemispheres pressed from AISI 304 or AISI 316 sheet, available in diameters from 19 mm to 3000 mm and wall thicknesses from 1 mm to 6 mm. Each hemisphere is formed on a press, then seam welded and ground to a smooth finish. Inner polishing is available on request. These half-balls serve as components in larger sculptures, architectural elements, or standalone art pieces where a curved, reflective surface is needed.
Key Benefits
- Hemispheres pressed from sheet steel are lighter than cast or solid forms, reducing lifting and handling effort
- AISI 304 and AISI 316 materials resist corrosion in outdoor and indoor environments
- Wall thickness from 1 mm to 6 mm allows cost and weight to match the structural need
- Inner polishing available on request for reflective or aesthetic interior surfaces
- Seam ground and blended to a smooth finish so the joint is not visible in reflection
- Can be welded to bases, pedestals, or other forms before final polishing for site-ready installation
Problems It Solves
- Cast or solid hemispheres become too heavy for large diameters, making installation difficult
- Painted or coated steel surfaces degrade at the seam or edge over time
- Buying hemispheres from multiple suppliers results in inconsistent polish and finish
- Drilling or modifying a finished hemisphere on site damages the surface and voids the finish
- Lack of inner polishing options limits use in enclosed or reflective interior spaces
Application Scenarios
Half-balls used as components in abstract sculptures and public art installations
Architectural elements in building facades, canopies, or interior partitions
Reflective panels in lobbies, atriums, or retail spaces where a curved surface is needed
Focal points in gardens and parks where a half-sphere form creates visual interest
Parts of larger spherical artworks where multiple hemispheres are joined together
Structural infill or decorative elements in metal balustrades and handrails
Who It Is For
- Sculpture fabricators building large-scale installations from modular parts
- Architects and designers specifying curved stainless steel elements in building envelopes
- Public art commissioners needing durable, reflective components for outdoor schemes
- Interior designers using half-balls as feature walls or ceiling elements
- Metalwork contractors sourcing matched hemispheres for a single project
- Film and VFX studios requiring HDRI reference shapes with consistent reflectivity
Technical Features
- Hemispheres formed on a stamping press from sheet steel
- Seam welded and ground to a smooth, invisible joint
- AISI 304 for general use, AISI 316 for coastal, pool, or chemically aggressive environments
- Wall thickness selectable from 1 mm to 6 mm based on structural need
- Inner polishing available on request for reflective or aesthetic interior surfaces
- Can be welded to pedestals, flanges, or other mounting components before final finish
- Available in diameters from 19 mm to 3000 mm, no fixed step between sizes
Specifications and Materials
| Material | AISI 304 or AISI 316 stainless steel |
|---|---|
| Diameter Range | 19 mm to 3000 mm |
| Wall Thickness | 1 mm to 6 mm |
| Forming Method | Stamping press formed |
| Standard Finish | Ground seam, brushed or matte surface |
| Optional Finish | Inner polishing on request |
| Secondary Operations | Welding to base or flange, hole drilling, tapping |
| Lead Time | 10 to 20 days after deposit received |
| Packing | Soft foam plastic inside, strong wooden box outside |
| Place of Origin | Shenzhen, China |
| Size Range | 19mm to 3000mm |
Materials
- AISI 304 stainless steel, standard for indoor and inland outdoor use
- AISI 316 stainless steel, recommended for coastal, pool, or high-salt environments
- Carbon steel available on request for internal or coated applications
Customization
- Any diameter between 19 mm and 3000 mm, not limited to standard sizes
- Wall thickness selected for the load case, not a fixed default
- Inner polishing available on request for reflective interior surfaces
- Welded base, flange, or mounting plate positioned to your drawing
- Hole drilling and thread tapping to your specifications before final polish
- Multiple hemispheres from the same batch for consistent finish and texture
How It Is Made
- Step 1Sheet steel cut and blanked to the required diameter and thickness
- Step 2Hemisphere formed on a stamping press
- Step 3Halves fitted and seam welded into a closed half-sphere
- Step 4Weld ground and blended until the joint is smooth and invisible in reflection
- Step 5Inner polishing applied if requested, using progressive grits
- Step 6Optional welding of base, flange, or mounting points
- Step 7Final surface finish applied (brushed, matte, or mirror if needed)
- Step 8Protective film applied, foam wrapped, and packed in a wooden box
Quality Control and Use
Quality Control
- Seam inspected under reflected light to ensure no flat spots or gaps
- Diameter and wall thickness verified before forming begins
- Inner polish checked for uniformity and clarity if requested
- Welded components tested for alignment and fit before final finish
- Photographs of the finished batch sent for approval before the balance is invoiced
Use Guide
- Specify diameter, wall thickness, finish, and any welding or drilling needs when requesting a quote
- Send base or mounting details so the welded component is placed correctly
- Choose 316 if the hemisphere will be used near salt water, pools, or de-icing chemicals
- Keep the protective film on until the piece 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 |
|---|---|
| Cast or solid hemispheres | Much lighter for large diameters, easier to handle and install, but not load bearing |
| Painted mild steel hemispheres | No rust at the seam and no repainting needed, but higher initial cost |
| GRP or acrylic hemispheres | Real metal reflectivity and durability, but slower to produce and heavier |
| Full stainless steel spheres | Half the weight and material cost, but requires a second piece for a complete form |
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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 Hemispheres Half Balls
What is the largest diameter you can make?
3000 mm on the standard press tooling. Intermediate sizes between 19 mm and 3000 mm are available without extra cost.
How long does an order take?
10 to 20 days after the deposit is received. Larger or mixed orders may take closer to 20 days.
Should I use 304 or 316?
304 is suitable for inland and indoor use. Use 316 for coastal areas, pool surrounds, or high-salt environments.
Can you polish the inside surface?
Yes, inner polishing is available on request. Specify this when placing the order.
Can you weld a base or flange to the hemisphere?
Yes, bases, flanges, or mounting plates can be welded before final polishing. Provide the detail with your order.
How are the hemispheres packed for shipping?
Each hemisphere is wrapped in soft foam plastic, then packed in a strong wooden box. Large pieces are cradled on a wooden stand inside the box.
Get a Price on Stainless Steel Hemispheres Half Balls
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