Perforated Mild Steel Sheet - R3/T4 (3.0mm Holes / 4.0mm Pitch)

Perforated mild steel sheet with R3/T4 hole pattern - 3.0mm round holes at 4.0mm pitch (staggered 60° triangular pattern). Hot-rolled or cold-rolled mild steel, supplied in standard UK sheet sizes (2x1m) and thicknesses (1mm, 1.5mm). Suitable for fabrication, ventilation, machine guards, screens, decorative panels, balustrade infill and architectural applications across the UK.

R3/T4 Pattern Specification

Hole diameter: 3.0mm round, staggered pattern.
Pitch: 4.0mm centre-to-centre spacing.
Material: Mild steel (uncoated, mill finish).
Manufacturing standard: BS EN ISO 9001 production tolerances.

Available Sizes & Pricing

All prices include VAT.

Applications

This R3/T4 pattern is suitable for: ventilation grilles, machine guards, infill panels, decorative facades, balustrade panels, acoustic screens, vehicle and trailer panels, sign blanks, sieves and filters, agricultural screens, architectural cladding. The 3.0mm hole size gives strong visual through-flow for ventilation.

Bulk & Trade Orders

For bulk and trade orders (5+ sheets or multi-pattern orders), contact us for a project quote - trade pricing is available for larger quantities. Sheets are supplied in the standard sizes shown above.

Delivery Information

Lead times are currently 3-5 working days for perforated mild steel sheets. Sheets are heavy and bulky - delivered on a pallet to mainland UK addresses. Suitable site access and someone available to assist with offloading are required.

Frequently Asked Questions

What does R3/T4 mean on a perforated sheet?
R3/T4 is the industry-standard pattern code: 'R' is the hole diameter and 'T' is the pitch (centre-to-centre spacing). So R3/T4 means 3.0mm round holes spaced at 4.0mm pitch on a staggered (60-degree triangular) pattern. This is the most common UK perforated sheet specification convention.

What is perforated mild steel used for?
Perforated mild steel sheet is used across construction, industrial, architectural and decorative applications - including ventilation grilles, machine guards, screens, sieves, vehicle and trailer panels, agricultural use, sign blanks, balustrade infill, balcony screens, acoustic panels, and as decorative facade panels. The choice of hole size and pitch depends on the open-area required and visual look you're after.

What thicknesses are available in R3/T4 pattern?
This R3/T4 pattern is available in: 1.5mm, 1mm. Thicker sheets give greater rigidity and load-bearing capacity but reduce open-area visibility. Choose the thickness based on your application - lighter gauges for decorative screens, heavier for structural or guarding applications.

What's the delivery lead time?
Lead times are currently 3-5 working days for perforated mild steel sheets. Sheets are heavy and bulky items - delivered on a pallet to mainland UK addresses. Suitable site access and somebody available to assist with offloading are required.