Materials Guide

Carbon steel (also called mild steel or structural steel) is the backbone of the global metalwork industry. With a carbon content of 0.15–0.30%, it strikes the optimal balance between tensile strength, weldability, and machinability. For staircases and balustrades, carbon steel is the default structural material — all spiral staircase center columns, floating staircase stringers, and curved staircase helical beams are manufactured in mild steel, which is then surface-finished to suit the environment and aesthetic. At StaircaseWorks, we source plate, tube, and section steel to EN 10025 (Europe) or ASTM A36 (US equivalent) standards, with mill test certificates available for every shipment.

Stainless steel achieves its corrosion resistance through a chromium oxide passive layer (minimum 10.5% Cr) that self-heals when scratched. For balustrades and handrails — components with daily human contact — stainless steel's hygienic surface, long service life, and premium visual quality make it the material of choice in hospitality, commercial, and high-end residential projects worldwide. We use two primary grades: - **AISI 304 (18/8)** — 18% chromium, 8% nickel. Suitable for dry indoor environments. More economical. - **AISI 316 (Marine grade)** — 18% chromium, 10% nickel, 2% molybdenum. The molybdenum addition provides superior resistance to chloride attack — essential for coastal locations, swimming pools, and high-humidity environments.

Aluminum alloy is the material of choice when weight reduction is critical — notably for prefabricated stair modules shipped globally, upper-floor balcony railings where reduced structural loading matters, and complex extrusion profiles that would be prohibitively expensive to roll-form in steel. We work primarily with two alloys: - **6063-T5** — architectural extrusion alloy. Excellent surface finish, anodizes beautifully. Used for balustrade posts, handrail profiles, and decorative components. - **6061-T6** — structural alloy. Higher tensile strength (310 MPa vs 215 MPa for 6063). Used for stair stringers and load-bearing components where weight saving is prioritised. All aluminum components are naturally corrosion-resistant through the same passive oxide layer mechanism as stainless steel — no paint or coating is required, though anodizing significantly extends the surface life.

Glass used in balustrades and stair infill panels is not ordinary float glass — it is safety glass, manufactured to strict international standards that require it to either break into small, harmless fragments (toughened glass) or hold together as a unit when fractured (laminated glass). **Toughened (Tempered) Glass** — Float glass is heated to approximately 620°C and then rapidly quenched. This creates compressive surface stresses that increase strength 4–5× and cause fragmentation into small, blunt pieces on impact. Standard for most balustrade applications. **Laminated Glass** — Two or more glass plies bonded by a PVB (polyvinyl butyral) or SentryGlas® interlayer. When fractured, the interlayer holds glass fragments in place — critical where falling glass would be hazardous (overhead, poolside, elevated walkways above pedestrian areas). At StaircaseWorks, we specify and supply safety glass cut to finished panel sizes as part of our balustrade systems, or as standalone supply for installer projects.