Tata staff in Port Talbot and Llanwern face cut in hours and pay
A third of Tata Steel workers at Port Talbot are facing reduced shifts and pay allowance deductions because of a fall in the demand for steel.
Workers at the sister factory in Llanwern, Newport, will also be hit by changes in their shift patterns.
The company has been meeting unions to discuss a plan about reducing the hours staff work until the market recovers.
A reduction in orders has been blamed for an "extremely tough" situation faced by the company, bosses said.
The changes will come into effect next month.
Carwyn Jones reports