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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,
 WjtenZFvtXWOp+W/wz/IP+WPAimCHinY15Z94VMFBp0qwCz2ZBo87UFfebRrJIHU
 rkPQgGdTXVNJ9g5ryIIutg==

<SEC-DOCUMENT>0000018172-04-000003.txt : 20040105
<SEC-HEADER>0000018172-04-000003.hdr.sgml : 20040105
<ACCEPTANCE-DATETIME>20040105113337
ACCESSION NUMBER:		0000018172-04-000003
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20031231
FILED AS OF DATE:		20040105

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HERRON MICHAEL BRUCE
		CENTRAL INDEX KEY:			0001184780

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-05415
		FILM NUMBER:		04502498

	MAIL ADDRESS:	
		STREET 1:		3400 NO WOLF RD
		CITY:			FRANKLIN PARK
		STATE:			IL
		ZIP:			60161

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CASTLE A M & CO
		CENTRAL INDEX KEY:			0000018172
		STANDARD INDUSTRIAL CLASSIFICATION:	WHOLESALE-METALS SERVICE CENTERS & OFFICES [5051]
		IRS NUMBER:				360879160
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		3400 N WOLF RD
		CITY:			FRANKLIN PARK
		STATE:			IL
		ZIP:			60131
		BUSINESS PHONE:		7084557111

	MAIL ADDRESS:	
		STREET 1:		3400 N WOLF RD
		CITY:			FRANKLIN PARK
		STATE:			IL
		ZIP:			60131
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>c0001184780d20040105f4f.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
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<ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-12-31</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0000018172</issuerCik><issuerName>CASTLE A M &amp; CO</issuerName>        <issuerTradingSymbol>CAS</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001184780</rptOwnerCik><rptOwnerName>HERRON MICHAEL BRUCE</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>3400 NORTH WOLF ROAD</rptOwnerStreet1><rptOwnerStreet2></rptOwnerStreet2><rptOwnerCity>FRANKLIN PARK</rptOwnerCity><rptOwnerState>IL</rptOwnerState><rptOwnerZipCode>60131</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>Vice President</officerTitle><otherText></otherText></reportingOwnerRelationship></reportingOwner><
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<directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Stock Options (Right to buy)</value></securityTitle><conversionOrExercisePrice><value>10</value></conversionOrExercisePrice><exerciseDate><value>2001-07-27</value></exerciseDate><expirationDate><value>2010-07-27</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>33000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>33000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Stock Options (Right to buy)</valu
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curityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>4376</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>4376</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Stock Options (Right to buy)</value></securityTitle><conversionOrExercisePrice><value>16</value></conversionOrExercisePrice><exerciseDate><value>2000-07-22</value></exerciseDate><expirationDate><value>2009-07-21</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>21000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>21000</value></sh
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</SEC-DOCUMENT>
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