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BRM-32 < REMOVAL AND INSTALLATION > PRECAUTIONS IN REPAIRING HIGH STRENGTH STEEL • When cutting HSS panels, avoid gas (torch) cutting if possible. Instead, use a saw to avoid weakening surrounding areas due to heat. If gas (torch) cutting is unavoidable, allow a minimum margin of 50 mm (1.97 in). • When welding HSS panels, use spot welding whenever possi- ble in order to minimize weakening surrounding areas due to heat. If spot welding is impossible, use MIG. welding. Do not use gas (torch) for welding because it is inferior in welding strength. • The spot weld on HSS panels is harder than that of an ordi- nary steel panel. Therefore, when cutting spot welds on a HSS panel, use a low speed high torque drill (1,000 to 1,200 rpm) to increase drill bit durability and facilitate the operation. 2. Precautions in spot welding HSS This work should be performed under standard working condi- tions. Always note the following when spot welding HSS: • The electrode tip diameter must be sized properly according to the metal thickness. PIIA0117E JSKIA0082GB PIIA0145E PIIA0146E |