steel supplier sunshine coast. (07) 5459 5459. MONDAY TO FRIDAY 7.30 AM - 4.00 PM. SATURDAY 8 AM - 11 AM. 20 Rigby St Nambour. Corten Garden Edging. What is Corten? Weathering steel is usually referred to by its trademark name COR-TEN. Known for its superior corrosion resistance and thickness.