What are the key characteristics of 1100 H18 brushed silver aluminum sheets?
1100 H18 is a commercially pure aluminum (99%+) with excellent corrosion resistance and formability. The H18 temper indicates full hardness achieved through cold working, providing higher strength than annealed states. Brushed silver finish offers aesthetic appeal with uniform directional grain patterns. These sheets typically have a thickness tolerance of ±0.02mm and surface roughness (Ra) of 0.2-0.5μm. Their reflectivity reaches 85-90% for visible light, making them popular for decorative applications.
How does the brushing process affect the mechanical properties of 1100 aluminum?
Brushing slightly increases surface hardness by about 5-10 HV through work hardening. The process removes 0.01-0.03mm of material but doesn't significantly alter tensile strength (110-130 MPa). Directional brushing may reduce fatigue resistance by 5-8% perpendicular to grain lines. Surface residual stresses from brushing improve dent resistance for thin gauges. The process maintains the alloy's original elongation properties (3-8% in H18 temper).
What industries commonly use thin 1100 H18 brushed aluminum sheets?
These sheets are widely applied in architectural cladding for elevators and column covers. Consumer electronics manufacturers use them for laptop/phone casings and control panels. The food industry employs them for decorative kitchen backsplashes and appliance trim. Signage companies value their light reflectivity for premium displays. Automotive designers specify them for interior trim pieces and badge emblems.
What are the standard thickness ranges for "thin" 1100 H18 brushed sheets?
Industrial standards classify 0.2-1.0mm as thin gauge for this application. Common stocked sizes include 0.3mm, 0.5mm, and 0.8mm thicknesses. Ultra-thin variants (0.15-0.25mm) are available for flexible lighting applications. Widths typically range from 600mm to 1500mm to accommodate various fabrication needs. Coil form is available for continuous processing applications.
How should brushed 1100 H18 sheets be maintained for long-term appearance?
Clean with pH-neutral (6-8) detergents and soft microfiber cloths to prevent scratching. Avoid abrasive cleaners that could alter the brushed grain pattern. Apply automotive-grade wax quarterly to maintain corrosion resistance. For outdoor use, anodized versions (5-10μm) provide better durability. Storage should be in dry conditions with interleaving paper to prevent surface contact marks.
