This video www.RexMetals.com reports on aerospace metals Invar. The video hastelloy X, goes through Invar invented, its uses, discoveries and modern Metal. (http://lh5.ggpht.com/_veNt4wCNwxE/TCBqBVsj5bI/AAAAAAAAIjU/dVeiRaC8o_w/s72/Invar_steel%2C_hastelloy_X.jpg)
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