Heat Affected Zone (HAZ)

The Heat Affected Zone (HAZ) is the area of metal that surrounding a weld or cut has been exposed to high temperatures during the process. While it isn’t melted like the weld itself, the heat changes the metal’s internal structure, which can affect its strength, ductility, and hardness. This zone often exhibits different properties compared to the untouched material, and understanding it is important for ensuring the integrity and durability of welded or heat-treated components. In essence, the HAZ is the region that experiences thermal influence without melting.