Tungsten W.47

Product Description

continue supply ,with SGS tested  certificate supplied,which meet with international standard, samples are ready for inspection and testing,pricing is according world market price, we can supply continuely  or for partial delivery per month,please contact with us to  the manager Mr. David Yeung,we also can supply other kind of rare metals, please contact with us to ask for details,this product is used in many field ,such as for electric bulb,the gun tube or other mimitary field.Tungsten also know as wolfram is a chemical element with the chemical symbol W and atomic number *4.A hard,rare metal under standard conditions when uncombined, tungsten is found naturally on earth only in chemical compounds. It wwas identified as a new element in ***1,and first isolated as a metal in ***3. Its important is remarkable for its robustness,especially the fact that it has the higest melting point of all the non-alloyed metals and the second higest of allthe elements after carbon. Also remarkable is its high density of *9.3 times that of water,comparable to that of uranium and gold, and much higher than that of lead. Tungsten with minor amount of impurities is often brittle and hard,making it difficult to work. However, very pure tungsten,though still hard,is more ductile,and can be cut with a hard-steel hacksaw.