stainless steel bollards: When to Use Them and How to Specify
Stainless steel bollards represent the premium end of the bollard market — specified by architects, landscape designers and urban realm consultants where appearance and longevity are equally important. This guide helps you specify the right grade, finish and fixing method for your project.
Why Choose Stainless Steel?
- Corrosion resistance — no painting or re-galvanising required
- Longevity — 20–30+ year lifespan with minimal maintenance
- Aesthetic — clean, modern, high-end appearance
- Vandal resistance — harder to damage than powder-coated steel
- Marine environments — resists salt air corrosion
Stainless Steel Grades
Grade 304 (1.4301)
The most widely used stainless steel grade. Contains 18% chromium and 8% nickel. Suitable for most UK inland applications — town centres, retail parks, commercial developments. Not suitable for coastal or highly polluted environments.
Grade 316 (1.4401)
Contains additional molybdenum for improved chloride resistance. The correct choice for coastal areas, harbours, pools and chemical environments. More expensive than 304 but essential in marine settings.
Grade 316L (Low Carbon)
Lower carbon content reduces risk of sensitisation during welding. Specified for heavily welded structures or where weld areas are exposed.
Surface Finishes
| Finish | Description | Application |
|---|---|---|
| 2B (mill finish) | Cold-rolled, smooth, slightly reflective | Industrial, functional |
| Brushed/satin (No.4) | Unidirectional grain, matte sheen | Most architectural applications |
| Mirror (No.8) | Highly polished, reflective | High-end retail, feature installations |
| Bead blast | Uniform matte texture | Contemporary public realm |
Typical Dimensions
Standard architectural bollards:
- Diameter: 76mm, 102mm, 114mm or 168mm
- Height above ground: 600mm, 750mm or 1,000mm
- Wall thickness: 3mm minimum; 5mm+ for security applications
Fixing Methods
Root-Fix (In-Ground)
Bollard root is set in concrete. Strongest and most permanent. Root depth typically 600–800mm. No visible fixings. Used for permanent public realm installations.
Core Drill Surface Mount
Bollard socket is cast into or drilled into concrete, and the bollard slides in and locks with a key. Allows bollards to be removed for maintenance without excavation.
Bolt-Down Flange
Base flange bolted to concrete with anchor bolts. Quickest installation, but visible fixings. Suitable for areas where aesthetics are less critical.
FAQ
Will stainless steel bollards rust?
Grade 304 and 316 stainless steel is corrosion resistant, not rust-proof. In highly chloride-rich environments (coastal, pool surrounds), 316 grade must be specified. Surface contamination from other metals (iron filings, carbon steel fixings) can cause surface staining — use stainless steel fixings throughout.
How much do stainless steel bollards cost?
Architectural stainless steel bollards typically cost £150–£600 each depending on grade, diameter, finish and top design. Security-rated stainless bollards start from around £500.
Can stainless steel bollards be security rated?
Yes. High-wall-thickness stainless bollards can be manufactured to and tested to PAS 68 standards. These are commonly used at airports, embassies and shopping centres where the aesthetic brief requires stainless steel but the security brief requires vehicle impact resistance.
🛒 Shop Related Products