Russia's RUSAL, the world's biggest aluminium producer, is prepared to cut output and costs this year to support prices, which could recover in 2013 if China also reduces production, a senior executive told Reuters. “The market price is at a level where about 30 percent of producers are unprofitable. This means that people are forced to significantly reduce capital expenditures, which leads to stagnation of the industry,” Oleg Mukhamedshin, RUSAL's head of equity and corporate development, said in an interview.  Aluminium prices ended last year near 18-month lows on concerns about weakening global demand for the metal, which is used in drink cans, car parts, planes and iPads, and prompted Alcoa and Norsk Hydro to cut capacity. Since then aluminium prices have fallen another 5 percent and forced RUSAL to prepare to shut 250,000 to 300,000 tonnes of annual capacity this year to support global prices.  But RUSAL also expects China to support the global market.  “This has gone on for long enough, and all producers should take responsibility for decisions on production volumes and more actively cut unprofitable production,” Mukhamedshin said in remarks cleared for publication on Tuesday.  This particularly suggests China.”  On Monday aluminium prices plumbed their lowest level in nearly two years at $1,915.25 a tonne before ending down $3 at $1,930.  The metal, which is in chronic oversupply, is under pressure from reports that China's top aluminium-producing province of Henan may subsidise electricity used by loss-making smelters in a bid to spur local growth. Mukhamedshin criticised this policy, calling on China to cut unprofitable production. Global companies, excluding Chinese producers, have cut output by about 1.3 million tonnes of since December 2011. Mukhamedshin estimated that 6 to 7 million tonnes of aluminium output in China are unprofitable now out of the 22 million that the country is expected to produce this year: “The rest of the world has about 3 million tonnes of loss-making capacity, he said. Our Chinese colleagues cut 1.7 million tonnes last year, and since January we do not see capacity shutting down in the country, which accounts for 45 percent of global aluminium output. If producers take more responsibility, average aluminium prices can reach $2,500 to $2,600 per tonne in 2013, up from an expected average this year of $2,200 a tonne. ”RUSAL is cutting its own cash costs, which were at $1,950 per tonne in the first quarter. The company has slightly delayed its Taishet project, which was expected to produce the first metal in 2013 and move to a full annual capacity of 750,000 tonnes eventually.  Last year non-recourse project financing for the Taishet aluminium smelter was arranged, and the company was expected to start major investments in the project in March. But it now plans to start investing later this year, Mukhamedshin added.