Form · Sizes pending
Metallic — indicative fig. M·72
Fire A1 Non-combustibleEmbodied carbon 2.50kgCO₂e/kg Medium–highCompressive 400MPa StructuralDesign life 50yr
Copper-zinc alloy (typically 60-70% Cu, 30-40% Zn) offering excellent machinability, antimicrobial properties, and corrosion resistance for architectural and plumbing hardware applications
01 Physical
Density 8470kg/m³
Specific gravity 8.47
Porosity 0%
Water absorption 0%
Hardness 80
UV resistance Excellent
Chemical resistance Good
pH tolerance 5.5-8.5
Surface roughness 0.8µm
02 Mechanical
Tensile strength 470MPa
Compressive strength 400MPa
Flexural strength 350MPa
Shear strength 260MPa
Poisson's ratio 0.31
Impact resistance 45
Creep resistance Moderate
03 Thermal
Thermal conductivity 115W/m·K
Specific heat 380J/kg·K
Thermal expansion 20.5×10⁻⁶/°C
04 Compliance & Fire First question
Combustibility class A1
Fire resistance level Non-combustible
Flame spread index 0
Smoke dev. index 0
Heat release rate 0
05 Sustainability & Health
Embodied carbon 2.5
Carbon footprint 3.8
Embodied energy 45MJ/kg
Water footprint 85L/kg
Recyclability 90%
Recycled content 70%
Renewable content 0%
Circular score 8.5
VOC emissions 0
Toxicity rating Low
LEED contribution 2
06 Durability · Cost · Logistics
Expected lifespan 50
Maintenance interval 12
Warranty period 10
Material cost (range) 12-25
Material cost (per unit) 18
Lead time 1-3 weeks
Lifecycle cost 450
Annual maintenance 50
Market availability Excellent
07 Assessment
Advantages
- Excellent antimicrobial properties (EPA registered)
- Superior machinability (100 rating for C360)
- Good corrosion resistance in atmospheric conditions
- Aesthetically appealing golden colour
- Non-ferromagnetic for easy recycling
- High electrical and thermal conductivity
- Good strength with maintained ductility
- Excellent cold forming properties
- 90%+ recyclability without property degradation
- Lower cost than bronze alternatives
Constraints
- Susceptible to dezincification in marine environments
- Stress corrosion cracking risk with ammonia exposure
- Tarnishing requires regular maintenance
- Lead content concerns in older alloys
- Lower strength than steel alternatives
- Galvanic corrosion risk with dissimilar metals
- Temperature limitations for high-zinc alloys
- Colour changes with heat exposure
- Not suitable for structural applications
- Higher cost than steel fittings
08 Applications
A1 Door hardware and architectural fittings
A2 Plumbing fixtures and valves (AS/NZS 3500 compliant)
A3 Marine hardware (DZR grades)
A4 Electrical terminals and connectors
A5 Fasteners and threaded components
A6 Healthcare antimicrobial touch surfaces
A7 Decorative architectural elements
A8 Lock cylinders and security hardware
A9 Window and cabinet hardware
A10 Industrial valve components
09 Sources & Standards
Sources pending — citations for this material are not yet recorded. Verify all figures against manufacturer data and current standards before specifying.