What is AA1100 H18 Plain Aluminium Sheet?
AA1100 H18 is a commercially pure aluminum sheet (99%+ aluminum content) with a hard temper (H18), achieved through cold rolling. It offers excellent corrosion resistance, formability, and electrical/thermal conductivity. The "H18" designation indicates it has been strain-hardened to increase strength while remaining non-heat-treatable. Common applications include chemical tanks, reflectors, and architectural trim. Its plain (smooth) surface suits painting or anodizing.
How does AA1100 H18 compare to other aluminum alloys?
Unlike alloys like 3003 or 5052, AA1100 has no added manganese/magnesium, making it softer but more malleable. It's weaker than heat-treatable alloys (e.g., 6061) but excels in environments requiring purity (e.g., food processing). Its conductivity surpasses most alloys, ideal for electrical components. However, it's less weldable than 5xxx/6xxx series. Cost is typically lower due to minimal alloying.
What are the key mechanical properties of AA1100 H18?
Typical tensile strength ranges from 110–150 MPa, with yield strength around 105 MPa. Elongation is approximately 5% due to the H18 temper's brittleness. It has a Brinell hardness of ~35 HB. The density is 2.71 g/cm³, lighter than steel but heavier than some alloys. Its melting point is 660°C, lower than alloyed alternatives.
Why choose AA1100 H18 for chemical or food industries?
Its high purity resists reactions with acids/alkalis, crucial for chemical storage. FDA compliance makes it safe for food contact (e.g., packaging, utensils). Non-toxicity and easy sterilization are advantages. The smooth surface prevents bacterial buildup. It's also recyclable, aligning with sustainability goals.
How should AA1100 H18 be fabricated and maintained?
Use shearing or CNC machining for cutting; avoid high-speed tools to prevent edge cracking. Bending requires larger radii due to low ductility in H18 temper. Clean with mild detergents-never hydrochloric acid. Store indoors to minimize oxidation (though it forms a protective oxide layer). For painted surfaces, apply primer to enhance adhesion.
