Lead-Coated Copper, 0.6mm base (0.6mm)
Lead-coated copper sheet (ASTM B101) for roofing/flashings. Copper base properties: density ~8.89-8.92 g/cm?, thermal conductivity ~397 W/m?K, specific heat ~385 J/kg?K and CTE ~17 x 10^-6 /?C.
Lead-coated copper sheet (ASTM B101) for roofing/flashings. Copper base properties: density ~8.89-8.92 g/cm?, thermal conductivity ~397 W/m?K, specific heat ~385 J/kg?K and CTE ~17 x 10^-6 /?C.
Lead-coated copper sheet is specified in ASTM B101 for building construction. The standard covers lead-coated copper sheet and strip for roofing, flashing, gutters and general sheet metalwork, with the lead coating applied by hot dipping. Copper base properties include density about 8.89-8.92 g/cm?, thermal conductivity ~397 W/m?K, specific heat ~385 J/kg?K and coefficient of thermal expansion around 17 x 10^-6 /?C. Lead coating improves corrosion resistance and patina behavior, but introduces toxicity and handling constraints.
- Exceptional lifespan 75-100+ years
- Superior marine corrosion resistance
- No green staining on masonry
- Develops protective gray patina
- Excellent UV resistance
- 100% recyclable materials
- Performs across all climate zones
- Self-healing minor scratches
- Low thermal movement
- Heritage authenticity
- 01 Exceptional lifespan 75-100+ years
- 02 Superior marine corrosion resistance
- 03 No green staining on masonry
- 04 Develops protective gray patina
- 05 Excellent UV resistance
- 01 Lead toxicity hazards
- 02 Stringent safety requirements
- 03 High disposal costs as hazardous waste
- 04 Prohibited for water catchment
- 05 Incompatible with zinc/aluminum
- Density
- 8.89-8.92 g/cm? (copper base; lead coating adds slightly) kg/m³
- Specific gravity
- 8.89-8.92
- Porosity
- <1% %
- Water absorption
- 0% %
- Hardness
- 54 minimum Rockwell F
- UV resistance
- Excellent (Class A) // No UV degradation
- Chemical resistance
- Excellent to acids/alkalis pH 3-12 // Lead enhances resistance
- pH tolerance
- 3-12
- Surface roughness
- Ra 0.8-2.5 μm µm
- Tensile strength
- 200-250 MPa (annealed copper) MPa
- Compressive strength
- 280-350 MPa MPa
- Flexural strength
- 200-250 MPa MPa
- Shear strength
- 172 MPa MPa
- Poisson's ratio
- 0.34
- Impact resistance
- 130-161 J (Charpy V-notch) // Excellent toughness
- Creep resistance
- Excellent below 150°C // Negligible creep at service temps
- Embodied carbon
- 4100 kg CO₂-eq/metric ton // Primary copper production
- Carbon footprint
- 4.2-4.5 kg CO₂-eq/m² // Including lead coating
- Embodied energy
- 47 GJ/metric ton MJ/kg // High energy intensity
- Water footprint
- 2100 m³/metric ton L/kg // Water-intensive production
- Recycled content
- 20-40% % // Typical industry average
- Renewable content
- 0% % // All mined materials
- Circular score
- 7/10 // High recyclability but lead handling issues
- Combustibility class
- A2 - Limited combustibility // Due to lead coating
- Fire resistance level
- Non-combustible base, A2 composite // Lead affects rating
- Ignition temp
- Not applicable - Non-combustible °C // Metals don't ignite
- Flame spread index
- 15-25
- Smoke dev. index
- 50-150
- Heat release rate
- <50 kW/m² // Minimal heat release
- Material cost (range)
- $45-85 per m² // 15-25% premium over standard copper
- Material cost (per unit)
- $450-850 per 10m² sheet // Standard sheet size
- Lead time
- 2-4 weeks standard, 6-12 weeks custom // Order requirements
- Lifecycle cost
- $1.70-2.20 per m² annually over 75-100 years // Excellent value
- Annual maintenance
- $0-200 typical residential // Minimal maintenance
- Market availability
- Limited - Specialty suppliers // Not widely stocked
- Expected lifespan
- 75-100+ years // Exceptional durability
- Maintenance interval
- Annual inspection, 5-10 year cleaning optional // Low maintenance
- Warranty period
- 20 years typical, 100 year expected // Manufacturer warranties