Reliance Steel & Aluminum Co.

Annual Shareholders Meeting

May 21, 2008www.rsac.com

FORWARD-LOOKING STATEMENT AND NON-GAAP MEASURE

This presentation may contain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These forward-looking statements are subject to risks and uncertainties that could cause actual results to differ materially from those projected in these statements.

Further information on factors that could affect the Company’s financial and other results are included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2007 and other reports on file with the Securities and Exchange Commission.

For data included within this presentation that is considered a “non-GAAP financial measure” any reconciliations required by Regulation G will be provided.

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COMPANY PROFILE

• A Fortune 500 company founded in 1939 in Los Angeles that went public in 1994

• NYSE company with $7.26 billion in 2007 annual net revenues and $1.91 billion in revenues for the three months ended March 31, 2008

• One of the largest metals service center companies in the U.S.

• Provides value added metals processing services

• Distributes a full-line of over 100,000 products to more than 125,000 customers

• More than 180 locations in 37 states and Belgium, Canada, China, South Korea and United Kingdom

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THE ROLE OF RELIANCE

> Over 125,000 customers

> Over 5,375,000 orders (average order size $1,350)in 2007

> 21,400 transactions per business day in 2007

> Just-in-time 24-hour delivery

> No customer represented more than 1.0% of total 2007 sales

Primary ProducersPrimary Producers Reliance Steel & Aluminum Co.Reliance Steel & Aluminum Co. End UsersEnd Users

>> Pre-production processing including:

• Slitting• Cutting• Sawing• Leveling• Shearing• Blanking• Burning• Toll processing

> Inventory management> Just-in-time delivery> Over 100,000 products> Approximately 85% of sales

from repeat customers

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RECENT ACCOMPLISHMENTS

• Best-ever 2007 fiscal year financial results • Record 2007 sales of $7.26 billion, up 26%

and net income of $408.0 million, up 15% and $5.36 earnings per diluted share, up 11% (stock split adjusted)

• Completed five acquisitions in 2007 and one acquisition so far in 2008

• 25% dividend increase to $.10 per share • Purchased 4.1 million shares of common

stock under the Share Repurchase Plan

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AGGRESSIVE ACQUISITION STRATEGY

• More than 40 acquisitions since 1994 IPO

• Immediately accretive to shareholders

• Minimum 15% pre-tax ROI

• Current management and employees remain in place

• Brand name stays in the community

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• Liebovich Bros. opened a new facility in WI and Siskin Steel & Supply expanded facility in TN

• Phoenix Metals added new locations in OH and PA and moved into a larger, more efficient facility in AL

• Precision Strip expanded AL facility and increased Allegheny Steel Distributors facility in PA

• Doubled the size of AMI Metals facility in Belgium and expanded the Valex Korea operation

• New Valex facility in Shanghai, China

• $124 million in 2007 and budgeted $210 million for 2008

INTERNAL GROWTH ACCOMPLISHMENTS

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2007 SALES BY PRODUCT

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11% Ca rbon S t e e l P la t e9% Ca rbon S t e e l Tubing

10% Ca rbon S t e e l Ba r7% Ca rbon S t e e l S t ruc t ura ls4% Ga lvanize d S t e e l S & C

3% Hot Rolled S t e e l S & C2% Cold Rolle d S t e e l S & C7% Aluminum Bar & Tube

5% He a t Tre a t e d Aluminum P la t e4% Common Alloy Aluminum S & C1% He a t Tre a t e d Aluminum S & C

2% Common Alloy Aluminum P la t e9% S t a inle ss S t ee l Ba r & Tube

6% S t a inle ss S t ee l S & C3% S t a inle ss S t ee l P la t e7% Alloy Ba r & Rod

1% Alloy Tube5% Ot he r1% Ele c t ropolishe d S S Tubing

2% Toll P roce ssing

2007 SALES BY COMMODITY

Stainless Steel19%

Alloy 9%

Toll2%

Carbon Steel46%

Aluminum19%

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Other 5%

2007 SALES BY REGION

Pacific NW8%

MidAtlantic4%

Mountain5%

Midwest25%

West/SW12%

California16%

Southeast19%

Northeast6%

Foreign 5%

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BROAD GEOGRAPHIC COVERAGE

National NetworkMore than 180 locations in 37 states and Belgium, Canada, China, South Korea and United Kingdom

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GEOGRAPHIC, PRODUCT AND CUSTOMER DIVERSITY

• More than 180 locations in 37 states and Belgium, Canada, China, South Korea and United Kingdom

• Full range of over 100,000 products

– Non-residential construction, general manufacturing and transportation categories including aerospace, truck trailer andrail car, energy, oil and gas, semiconductor, electronics and wind turbines markets

– Diversified customer base of more than 125,000 customers

– No customer represented more than 1.0% of 2007 sales

– Toll processing 2% of sales

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• Proven ability to perform in all types of operating environments

• All sectors performing reasonably well

• Healthy metals pricing

• Oil, gas and energy end markets strongest

• Geographic regions remain healthy

• Favorable industry consolidation and acquisition opportunities

MARKET CONDITIONS

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NET SALES

(Millions of $)

0

1000

2000

3000

4000

5000

6000

2003 2004 2005 2006 2007 2007 2008

$5,742

$3,367

$1,882

$2,943

$7,255

March 31

$1,842

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$1,908

NET INCOME

(Millions of $)

March 31

0

50100150200250300350400

2003 2004 2005 2006 2007 2007 2008

$34.0

$169.7

$354.5

$408.0

$205.4

$111.7 $107.4

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EARNINGS PER SHARE DILUTED

Dollars ($)

March 31

0.00

1.00

2.00

3.00

4.00

5.00

2003 2004 2005 2006 2007 2007 2008

$.53

$2.60$3.10

$4.82 $5.36

$1.46 $1.46

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• Strong financial position and ready access to capital

• Managed working capital well in 2007

• Operating cash flow of $639 million, or $8.40 per diluted share

• Net-debt-to total capital ratio of 33.1% at March 31, 2008 and 32.4% at December 31, 2007

• Book value of $28.81 at March 31, 2008 and $28.12 at December 31, 2007

• Investment grade credit rating

2007 FINANCIAL HIGHLIGHTS

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Stock Price Performance

19

0

100

200

300

400

500

600

12/02 12/03 12/04 12/05 12/06 12/07

Reliance Steel &Aluminum Co.

S & P 500

Russell 2000

New Peer Group

Old Peer Group

$

* $100 Invested on December 31, 2002 in stock or index – including reinvestment of dividends. Fiscal Year ending December 31.

SHAREHOLDER VALUE

• 48 years of consecutive quarterly cash dividends

• 25% dividend rate increase effective 2008 1Q to $.10 per share

• Increased regular dividend 15 times (since 1994 IPO)

• Committed to shareholder value - 2007 ROE of 23%

• Dividend payments increased 1,700% (since 1994 IPO)

• Stock value compound annual growth rate of 24% at March 31, 2008 (since 1994 IPO)

• Named to the 2007 Fortune 500 list

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CORPORATE SUSTAINABILITY

• Economic sustainability

• Environmental stewardship

• Social well-being, health and safety

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INVESTMENT HIGHLIGHTS

• A market leader within the metals service center industry

• Diversification of products, customers and geography serve to reduce

volatility in operating performance

• Favorable industry dynamics supported by healthy end use markets

• Unique, decentralized operating structure focused on profitability and

working capital management

• Demonstrated ability to grow existing businesses and also identify

and make accretive acquisitions

• Experienced management team with solid track record

• Financial strength and discipline to support continued growth22

Reliance Steel & Aluminum Co.www.rsac.com