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6. INVENTORIES (Tables)

12 Months Ended

Dec. 31, 2017

Inventories Tables

Inventory

			Consolidated
	12/31/2017		12/31/2016
Finished goods	1,308,802		1,183,619
Work in progress	1,135,589		674,860
Raw materials	1,050,588		1,124,158
Spare parts	814,725		824,478
Iron ore	278,041		255,029
Advances to suppliers	12,514		3,168
(-) Provision for losses	(135,840)		(101,176)
	4,464,419		3,964,136

Changes in provision for inventory losses

The movements in the provision for inventory losses are as follows:

				Consolidated
		12/31/2017		12/31/2016
Opening balance		(101,176)		(111,427)
Reversal / (losses) for slow-moving and obsolescence		(34,664)		10,251
Closing balance		(135,840)		(101,176)