-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 P7RrdXVECLC+N+WHbLtVsmsPbhme4RQ9fD6ZgNa+yxbegxdn7TdAmrT2AcyDh4eS
 /xMKoGyf00yb9a9ZXimCjA==

<SEC-DOCUMENT>0001179110-05-013416.txt : 20050701
<SEC-HEADER>0001179110-05-013416.hdr.sgml : 20050701
<ACCEPTANCE-DATETIME>20050701124957
ACCESSION NUMBER:		0001179110-05-013416
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050701
FILED AS OF DATE:		20050701
DATE AS OF CHANGE:		20050701

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HEGI FREDERICK B JR
		CENTRAL INDEX KEY:			0001122235

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12881
		FILM NUMBER:		05931726

	BUSINESS ADDRESS:	
		STREET 1:		2100 MCKINNEY AVE., 9TH FLOOR
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75201

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LONE STAR TECHNOLOGIES INC
		CENTRAL INDEX KEY:			0000791348
		STANDARD INDUSTRIAL CLASSIFICATION:	STEEL PIPE & TUBES [3317]
		IRS NUMBER:				752085454
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		15660 N DALLAS PKWY
		STREET 2:		SUITE 500
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75248
		BUSINESS PHONE:		9727706401
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-07-01</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000791348</issuerCik>
        <issuerName>LONE STAR TECHNOLOGIES INC</issuerName>
        <issuerTradingSymbol>LSS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001122235</rptOwnerCik>
            <rptOwnerName>HEGI FREDERICK B JR</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>750 N. ST. PAUL, SUITE 1200</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75201</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Phantom Stock Unit</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.00</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2005-07-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>346.15</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>346.15</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Reporting Person was allocated these phantom stock units as a deferral of $15,750 of his director's fees for the second quarter of 2005.  The grant of the phantom stock units is exempted from Section 16(b) of the Act by Rule 16b-3.  Upon his retirement from the Issuer's board of directors, the Reporting Person will be paid cash by the Issuer for each phantom stock unit that he then owns in an amount equal to the then current market price of one share of the Issuer's Common Stock.</footnote>
        <footnote id="F2">Reporting Person was allocated 7,197.89 units in 1989; 1,461.87 units in 1998; 2,242.33 units in 1999; 937.05 units in 2000; 2,334.40 units in 2001; 2,789.14 units in 2002; 2,814.83 units in 2003; 2,296.91 units in 2004; and 745.59 units in 2005 through July 1, 2005.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Frederick B. Hegi, Jr., by Robert F. Spears, Attorney-In-Fact</signatureName>
        <signatureDate>2005-07-01</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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