__________ is used as a material of construction for the blade of power saw.

ANS:D - High speed steel

Stainless steel is commonly used as a material of construction for the blade of power saws. Explanation:

1. Stainless Steel: Stainless steel is a type of steel alloy containing chromium, which enhances its resistance to corrosion and staining. It also typically contains other elements such as nickel and molybdenum to further improve its properties. Stainless steel is known for its durability, strength, and resistance to corrosion, making it suitable for various applications, including the manufacture of power saw blades.
2. Suitability for Power Saw Blades: Power saw blades require materials that are strong, durable, and resistant to wear and corrosion. Stainless steel meets these criteria effectively, making it a preferred choice for manufacturing power saw blades. It can withstand the rigors of cutting through various materials without losing its sharpness or deteriorating due to exposure to moisture or other environmental factors.
3. Alternatives: While stainless steel is commonly used for power saw blades, other materials such as high-speed steel (HSS) and carbide-tipped blades are also used depending on the specific requirements of the application. High-speed steel offers superior cutting performance at high speeds and temperatures, while carbide-tipped blades provide excellent durability and longevity, especially when cutting hard materials.