Chinese tungsten prices shifted up again before China’s week-long National Day holiday, on tight concentrate supply and strong downstream demand from the hard alloys sector. Tungsten concentrate is trading at 90,000-91,000 yuan ($13,437-13,586) per tonne, up 3,000 yuan from last week, the highest level since August 2008. “Demand from the hard alloys sector is still robust, while supply of concentrate is very tight now […]