First Supplemental Indenture



 EXHIBIT 4.1 
  

 EARLE M. JORGENSEN COMPANY 
 AND 
 RSAC ACQUISITION CORP. 
 TO 
 THE BANK OF NEW YORK TRUST COMPANY, N.A. 
 (Successor to The Bank of New York), as Trustee 
  

 FIRST SUPPLEMENTAL INDENTURE 
 Dated
April 3, 2006 
  

 Supplementing Indenture dated as of May 22, 2002 







 FIRST SUPPLEMENTAL INDENTURE, dated April 3, 2006, by and among EARLE M. JORGENSEN COMPANY, a
corporation duly organized and existing under the laws of the State of Delaware (“EMJ”), RSAC Acquisition Corp., a corporation duly organized and existing under the laws of the State of Delaware (“RSAC”), and THE BANK OF NEW YORK
TRUST COMPANY, N.A., a national banking association, as Trustee (the “Trustee”) under the Indenture (as hereinafter defined). 
 RECITALS OF EMJ AND RSAC 
 EMJ, and The Bank of New York, a New York banking corporation, as trustee (the “Original
Trustee”), entered into an Indenture, dated as of May 22, 2002 (the “Indenture”), providing for the issuance by EMJ of its 9 3/4% Senior Secured Notes due 2012 (the “Notes,” which term shall have the meaning assigned to it in the Indenture). 
 Pursuant to the Indenture, EMJ issued $250,000,000 aggregate principal amount of the Notes, all of which are outstanding on the date hereof. 

Pursuant to that certain Agreement of Resignation, Appointment and Acceptance, by and among EMJ, the Original Trustee and The Bank of New York Trust
Company, N.A. (“BNYTC”), effective June 1, 2005, BNYTC succeeded to the Original Trustee as Trustee under the Indenture. 
 On
the date hereof, and effective as of the time (the “Effective Time”) of the Merger (as hereinafter defined), EMJ merged (the “Merger”) with and into RSAC, whereby and whereupon the existence of EMJ ceased and RSAC continued as
the surviving corporation under the changed name “Earle M. Jorgensen Company,” pursuant to that certain Agreement and Plan of Merger, dated January 17, 2006, by and among Reliance Steel & Aluminum Co., a California
corporation, RSAC and EMJ. 
 Section 1001(i) of the Indenture provides that, without the consent of any Holders, the Company
when authorized by a Board Resolution, and the Trustee, may enter into an indenture supplemental to the Indenture for the purpose, among other things, of evidencing the succession of another Person to the Company and the assumption by such successor
of the covenants of the Company contained in the Indenture or in the other Note Documents. 
 The Trustee has received from EMJ and RSAC
Officers’ Certificates stating, among other things, that the Merger complies with the applicable provisions of the Indenture and Opinions of Counsel stating, among other things, that all conditions precedent to the execution and delivery of
this Supplemental Indenture have been complied with. 
 The execution and delivery of this First Supplemental Indenture have been duly
authorized by Board Resolutions of EMJ and RSAC, and EMJ and RSAC have requested the Trustee to join with them in the execution of this First Supplemental Indenture. 
 For and in consideration of the premises, it is mutually covenanted and agreed for the equal and proportionate benefit of all Holders, as follows: 







 ARTICLE I 
 Section 1.01. Effective as of the Effective Time, RSAC hereby expressly assumes all of the obligations of EMJ under the Indenture, the Notes, the Security Documents, the Registration Rights Agreement and the
Intercreditor Agreement, and RSAC succeeds to, and is substituted for, and may exercise every right and power of, EMJ under the Indenture, the Notes, the Security Documents, the Registration Rights Agreement and the Intercreditor Agreement.

 ARTICLE II 
 MISCELLANEOUS

 Section 2.01. The Indenture, as supplemented by this First Supplemental Indenture, is in all respects ratified and confirmed, and
this Supplemental Indenture shall be deemed a part of the Indenture in the manner and to the extent herein and therein provided. 
 Section 2.02. The recitals herein shall be taken as the statements solely of the EMJ and RSAC, and the Trustee assumes no responsibility for the correctness thereof. The Trustee makes no representations as to, and shall not be
responsible in any manner whatsoever for or in respect of, the validity or sufficiency of this First Supplemental Indenture. 
 Section 2.03. All the covenants, stipulations, promises and agreements in this First Supplemental Indenture contained by each of the EMJ and RSAC shall bind its successors and assigns whether so expressed or not. 
 Section 2.04. This First Supplemental Indenture shall be governed by and construed in accordance with the law of the State of New York (including
without limitation Section 5-1401 of the New York General Obligations Law or any successor to such statute). 
 Section 2.05. This
First Supplemental Indenture may be executed with counterpart signature pages or in any number of counterparts, each of which shall be an original but such counterparts shall together constitute but one and the same instrument. 
 Section 2.06. Nothing in this Supplemental Indenture or the Notes, express or implied shall give to any Person, other than the parties hereto and
their successors hereinunder and the Holders, any benefit of any legal or equitable right, remedy or claim under the Indenture, this Supplemental Indenture or the Notes. 
 Section 2.07. Capitalized terms not otherwise defined in this First Supplemental Indenture shall have the respective meanings assigned to them in the Indenture. 







 IN WITNESS WHEREOF, this First Supplemental Indenture has been duly executed as of the date first-above
written. 
  

			
	 EARLE M. JORGENSEN COMPANY, a
Delaware corporation

		
	By:	 	 /s/    WILLIAM S. JOHNSON

	Name:	 	William S. Johnson
	Title:	 	 Vice President and Chief
 Financial
Officer



  

			
	 RSAC ACQUISITION CORP., a Delaware
corporation

		
	By:	 	 /s/    KARLA LEWIS

	Name:	 	Karla Lewis
	Title:	 	Chief Financial Officer and
Secretary


  

			
	 THE BANK OF NEW YORK TRUST
COMPANY, N.A., as Trustee

		
	By:	 	 /s/    MELONEE YOUNG

	Name:	 	Melonee Young
	Title:	 	 Vice President