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Tungsten Heavy Alloy Block Tungsten alloy block (WNiFe, WNiCu alloy)according to standard ASTM B777 , AMS- T 21014 , including 90WNiFe, 93WNiFe , 95WNiFe , 97WNiFe , 90WNiCu, 93WNiCu , 95WNiCu , ...