Powder metallurgy connection(half finished products) Density:6.7g/cc Original material is steel A3.Now we change the material to powder metallugy.The powder metallugy have many advantages, especialy at the cost ,the cost is decreased by20%.I believe that it is very very useful under this circumstance that the cost of raw material increasely. The other is making processing ismoreeasy,the powder metallurgy (density of 6.7g/cc)only need threading, drill horizontal hole and tapping, finally nigrescence. We can accord to the clients' drawing to design and product the parts.