IS 11109 Grade I

IS 11109 Grade I is a silicon brass alloy standard in India, commonly known as Silicon Brass Grade 1. It typically contains a minimum of 79% copper, 12.5-16% zinc, 3.2-5% silicon, and up to 0.5% lead. This grade is used for manufacturing valve, pump, and automotive components due to its good strength, corrosion resistance, and machinability.

Chemical Composition of IS 11109 Grade I (Silicon Brass)

• Copper (Cu): Minimum 79%

• Zinc (Zn): 12.5 - 16%

• Silicon (Si): 3.2 - 5%

• Lead (Pb): Maximum 0.5%

• Phosphorus (P): Around 0.3%

• Other elements like iron, manganese in trace amounts