    <SEC-DOCUMENT>0001104659-21-029118-index.html : 20210226
    <SEC-HEADER>0001104659-21-029118.hdr.sgml : 20210226
    <ACCEPTANCE-DATETIME>20210226154118
    ACCESSION NUMBER:		0001104659-21-029118
    CONFORMED SUBMISSION TYPE:	6-K
    PUBLIC DOCUMENT COUNT:		17
    CONFORMED PERIOD OF REPORT:	20210226
    FILED AS OF DATE:		20210226
    DATE AS OF CHANGE:		20210226

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			GERDAU S.A.
    		CENTRAL INDEX KEY:			0001073404
    		STANDARD INDUSTRIAL CLASSIFICATION:	STEEL WORKS, BLAST FURNACES & ROLLING & FINISHING MILLS [3310]
    		IRS NUMBER:				000000000
    		STATE OF INCORPORATION:			D5
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		6-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-14878
    		FILM NUMBER:		21688184

    	BUSINESS ADDRESS:
    		STREET 1:		AV DOUTORA RUTH CARDOSO, 8,501
    		STREET 2:		8TH FLOOR
    		CITY:			SAO PAULO, SP
    		STATE:			D5
    		ZIP:			05425-070
    		BUSINESS PHONE:		011-55-51-3323-2703

    	MAIL ADDRESS:
    		STREET 1:		AV DOUTORA RUTH CARDOSO, 8,501
    		STREET 2:		8TH FLOOR
    		CITY:			SAO PAULO, SP
    		STATE:			D5
    		ZIP:			05425-070

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	GERDAU SA
    		DATE OF NAME CHANGE:	19981112
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>6-K
    <SEQUENCE>1
    <FILENAME>tm217830d1_6k.htm
    <DESCRIPTION>FORM 6-K
    <TEXT>
    Document 1 - file: tm217830d1_6k.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>tm217830d1_ex99-1.htm
    <DESCRIPTION>EXHIBIT 99.1
    <TEXT>
    Document 2 - file: tm217830d1_ex99-1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>image_009.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: image_009.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>image_010.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: image_010.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>image_011.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: image_011.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>tm217830d1_ex99-1img001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: tm217830d1_ex99-1img001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>tm217830d1_ex99-1img002.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: tm217830d1_ex99-1img002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>tm217830d1_ex99-1img003.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: tm217830d1_ex99-1img003.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>tm217830d1_ex99-1img004.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: tm217830d1_ex99-1img004.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>tm217830d1_ex99-1img006.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: tm217830d1_ex99-1img006.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>tm217830d1_ex99-1img007.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 11 - file: tm217830d1_ex99-1img007.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>tm217830d1_ex99-1img008.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 12 - file: tm217830d1_ex99-1img008.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>tm217830d1_ex99-1img009.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 13 - file: tm217830d1_ex99-1img009.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>tm217830d1_ex99-1img01.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 14 - file: tm217830d1_ex99-1img01.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>tm217830d1_ex99-1img010.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 15 - file: tm217830d1_ex99-1img010.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>tm217830d1_ex99-1img013.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 16 - file: tm217830d1_ex99-1img013.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>tm217830d1_ex99-1img02.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 17 - file: tm217830d1_ex99-1img02.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>