-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 NV+0OgGOjELCsrRuEe7XtwaZeWjO5cbvn8bfA4Xxe/9JrDLKo5jSraCMJrklyb5i
 7aqv8NQVrs7Npzt400Zcvg==

<SEC-DOCUMENT>0000893877-10-000565.txt : 20101105
<SEC-HEADER>0000893877-10-000565.hdr.sgml : 20101105
<ACCEPTANCE-DATETIME>20101105191122
ACCESSION NUMBER:		0000893877-10-000565
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20101103
FILED AS OF DATE:		20101105
DATE AS OF CHANGE:		20101105

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Klauer Thomas D Jr
		CENTRAL INDEX KEY:			0001341893

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-22496
		FILM NUMBER:		101170332

	MAIL ADDRESS:	
		STREET 1:		3200 NW YEON AVENUE
		CITY:			PORTLAND
		STATE:			OR
		ZIP:			97210

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SCHNITZER STEEL INDUSTRIES INC
		CENTRAL INDEX KEY:			0000912603
		STANDARD INDUSTRIAL CLASSIFICATION:	WHOLESALE-MISC DURABLE GOODS [5090]
		IRS NUMBER:				930341923
		STATE OF INCORPORATION:			OR
		FISCAL YEAR END:			0831

	BUSINESS ADDRESS:	
		STREET 1:		3200 NW YEON AVE
		STREET 2:		P O BOX 10047
		CITY:			PORTLAND
		STATE:			OR
		ZIP:			97210-0047
		BUSINESS PHONE:		5032249900

	MAIL ADDRESS:	
		STREET 1:		P O BOX 10047
		CITY:			PORTLAND
		STATE:			OR
		ZIP:			97210
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-11-03</periodOfReport>

    <issuer>
        <issuerCik>0000912603</issuerCik>
        <issuerName>SCHNITZER STEEL INDUSTRIES INC</issuerName>
        <issuerTradingSymbol>SCHN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001341893</rptOwnerCik>
            <rptOwnerName>Klauer Thomas D Jr</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3200 NW YEON AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>PORTLAND</rptOwnerCity>
            <rptOwnerState>OR</rptOwnerState>
            <rptOwnerZipCode>97210</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President, Auto Parts Bus.</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-11-03</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>715</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>52.13</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>16488</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Shares were withheld by the issuer to cover withholding taxes on issuance of performance shares. Compensation committee certification of the payout of these performance shares was reported on Form 4 filed on October 28, 2010.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Richard C. Josephson, Attorney-in-Fact</signatureName>
        <signatureDate>2010-11-05</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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