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Inventories (Tables)
 12 Months Ended
Jun. 30, 2019
Inventory Disclosure [Abstract]  
Inventories
Inventories consisted of the following at June 30: 
(in thousands)
2019
 
2018
Finished goods
$
311,684

 
$
279,240

Work in process and powder blends
246,414

 
232,973

Raw materials
95,620

 
96,859

Inventories at current cost
653,718

 
609,072

Less: LIFO valuation
(82,142
)
 
(83,606
)
Total inventories
$
571,576

 
$
525,466