The angle of the cutting tip used to machine mild steel on a lathe is 55 to 80 degrees depending on the surface roughness, size of the cut and type of finish required.
The included angle of a drill bit used for mild steel is typically around 118 degrees. This angle strikes a balance between cutting efficiency and durability, making it suitable for most drilling applications in mild steel. For specific tasks or materials, variations in drill angle may be employed, but the 118-degree angle is generally considered standard for general-purpose drilling.
for rc works
309
mild steel.
mild steel
duev to its ductility
Zinc
Mild steel is harder than copper as it has a higher hardness level on the Mohs scale. Mild steel is commonly used in construction and manufacturing due to its durability and strength, while copper is known for its excellent electrical conductivity and malleability.
For machining titanium, high-speed steel (HSS) and carbide tooling are commonly used, with specialized coatings like TiAlN to enhance durability and reduce wear. Aluminum typically uses carbide tooling or HSS with a high rake angle to facilitate chip removal and minimize binding. For steel and mild steel, HSS and carbide tools with robust geometries are preferred, often featuring coatings to improve performance and tool life. Each material requires specific tooling to optimize cutting speeds and achieve desired surface finishes.
Because hard steel would be brittle and break.
During a tensile test of mild steel, the bar is tested until it breaks. It measures how much stress the mild steel can take before it finally breaks under the pressure.
both of these are same In some places they are used interchangeabl low carbon steel has 0.05-0.15% carbon mild carbon steel has0.16-0.29% carbon http://www.metalsupplies.com/