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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 11-K

(Mark One)

For the fiscal year ended December 31, 2014

OR

For the transition period from ____________ to ______________

Commission file number: 001-13122

A.  Full title of the plan and the address of the plan, if different from that of the issuer named below:

Precision Strip, Inc. Retirement and Savings Plan

B.  Name of issuer of the securities held pursuant to the plan and the address of its principal executive office:

Reliance Steel & Aluminum Co.

350 South Grand Avenue, Suite 5100

Los Angeles, California 90071

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Precision Strip, Inc.

Financial Statements and Supplemental Schedule

As of December 31, 2014 and 2013 and
For the Year Ended December 31, 2014

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Precision Strip, Inc.

Retirement and Savings Plan

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Report of Independent Registered Public Accounting Firm

To the Plan Administrator

Precision Strip, Inc. Retirement and Savings Plan

Minster, Ohio

We have audited the accompanying statements of net assets available for benefits of the Precision Strip, Inc. Retirement and Savings 401(k) Plan (the “Plan”) as of December 31, 2014 and 2013, and the related statement of changes in net assets available for benefits for the year ended December 31, 2014.  These financial statements are the responsibility of the Plan’s management. Our responsibility is to express an opinion on these financial statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. The Plan is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Plan’s internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in all material respects, the net assets available for benefits of the Plan as of December 31, 2014 and 2013, and the changes in net assets available for benefits for the year ended December 31, 2014, in conformity with accounting principles generally accepted in the United States of America.

The accompanying supplemental schedule of assets (held at end of year) as of December 31, 2014 has been subjected to audit procedures performed in conjunction with the audit of the Plan’s financial statements. The supplemental schedule is the responsibility of the Plan’s management. Our audit procedures included determining whether the supplemental schedule reconciles to the financial statements or the underlying accounting and other records, as applicable, and performing procedures to test the completeness and accuracy of the information presented in the supplemental schedule. In forming our opinion on the supplemental schedule, we evaluated whether the supplemental schedule, including its form and content, is presented in conformity with the Department of Labor’s Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. In our opinion, the supplemental schedule is fairly stated, in all material respects, in relation to the financial statements as a whole.

/s/ BDO USA, LLP

Los Angeles, California

June 22, 2015

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Precision Strip, Inc.

Retirement and Savings Plan

See accompanying notes to financial statements.

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Precision Strip, Inc.

Retirement and Savings Plan

See accompanying notes to financial statements.

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Precision Strip, Inc.

Retirement and Savings Plan

1.         Description of the Plan

The following brief description of the Precision Strip, Inc. Retirement and Savings Plan (the “Plan”) provides only general information. Participants should refer to the Summary Plan Description for a more complete description of the Plan’s provisions.

General

The Plan is a defined contribution plan providing retirement benefits covering all employees who meet certain eligibility requirements of Precision Strip, Inc. (the “Company”), a wholly-owned subsidiary of Reliance Steel & Aluminum Co., and Precision Strip Transport, Inc., a wholly-owned subsidiary of Precision Strip, Inc. The Plan is subject to the provisions of the Employee Retirement Income Security Act of 1974 (“ERISA”) and subsequent amendments. The Plan is administered by the Precision Strip, Inc. Retirement and Savings Plan Administrative Committee (“Plan Administrator”).

Participation

Each employee is eligible to participate on the first day of each plan calendar quarter after the completion of three months of service.

An eligible employee who has satisfied the Plan’s waiting period and is first hired is automatically enrolled into the Plan with a 2% deferral of eligible compensation. Unless elected otherwise, their automatic enrollment contribution will increase annually by 2%, to a maximum of 8%. An eligible employee may decline to be automatically enrolled into the Plan and they can also elect a different deferral percentage.

Contributions

Participants may make up to 50% salary deferrals of eligible compensation to the Plan, subject to federal limits. The Plan also allows the Company to make employer profit sharing contributions, which are discretionary. Eligible participants who complete 1,000 hours of service are eligible to receive the employer contribution. Participants may also contribute distributions from other qualified defined benefit or defined contribution plans, and from individual retirement accounts.

Participant Accounts

Each participant’s account is credited with the participant’s contributions, employer contributions and allocation of investment earnings. The benefit to which a participant is entitled is the benefit that can be provided from the participant’s account. Participants may direct the investment of their account balances into various investment funds offered by the Plan.

Vesting

Participants are immediately vested in all employee contributions and eligible rollovers plus actual earnings thereon. Employer profit sharing contributions and any earnings thereon are vested in accordance with the following schedule:

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Retirement and Savings Plan

Payment of Benefits

On termination of service, or upon death, disability, or retirement, a participant can receive a lump sum amount equal to the vested value of his or her account. A monthly installment payment option is also available. Other withdrawals from participants’ account balances may be made under certain circumstances, as defined in the Plan document.

Forfeitures

Forfeitures from nonvested participant accounts are used to reduce future Company contributions. During the year ended December 31, 2014, forfeitures of $97,159 were used to reduce the Company’s contributions. Forfeited nonvested accounts totaled $879 and $599 at December 31, 2014 and 2013, respectively.

Notes Receivable from Participants

Participants may borrow from their accounts up to the lesser of $50,000 or 50% of their vested account balance. Loans are secured by the respective participant’s vested account balance and are subject to interest charges. Interest rates applicable to new notes are determined by the Plan Administrator on the first day of each calendar quarter based on prevailing market rates. Loans are repaid ratably through periodic payroll deductions over a term not exceeding five years for general purpose loans and up to ten years for the purchase of a primary residence. Interest rates on notes receivable from participants as of December 31, 2014 ranged from 4.25% to 8.25% and mature through October 2024. Interest earned is recorded on an accrual basis as interest income from notes receivable from participants in the Statement of Changes in Net Assets Available for Benefits.

Administrative Expenses

Non-investment costs and administrative expenses of the Plan are paid by the Company, which is a party-in-interest. These expenses, which are not reflected in the accompanying financial statements, constitute exempt party-in-interest transactions under ERISA. Loan establishment, loan maintenance and short-term trading fees are paid by the Plan’s participants and all other investment expenses are offset against the related investment income. Fees paid by the Plan participants to the trustee and recordkeeper for administrative expenses amounted to $27,957 for the year ended December 31, 2014.

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Retirement and Savings Plan

2.         Summary of Significant Accounting Policies

Basis of Presentation

The accompanying financial statements of the Plan are prepared under the accrual method of accounting in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”).

As described in the Plan Accounting—Defined Contribution Pension Plans topic of the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“Codification”), investment contracts held by a defined-contribution plan are required to be reported at fair value. However, contract value is the relevant measurement attribute for that portion of the net assets available for plan benefits of a defined contribution plan attributable to fully benefit-responsive investment contracts because contract value is the amount participants would receive if they were to initiate permitted transactions under the terms of the Plan.

The Plan invests in the Fidelity Managed Income Portfolio which is a common collective trust. It invests in fully benefit-responsive investment contracts issued by insurance companies and other financial institutions, and in fixed income securities (see Investment Valuation and Income Recognition). The Plan’s Statements of Net Assets Available for Benefits present the fair value of these investment contracts as well as the adjustment of the fully benefit-responsive investment contracts from fair value to contract value. The Statement of Changes in Net Assets Available for Benefits is prepared on a contract value basis.

Investment Valuation and Income Recognition

The Plan’s investments in registered investment companies (mutual funds) and in common stock are stated at fair value based on the quoted market price of the funds or common stock. The investments in registered investment companies represent the net asset value of the shares held by the Plan at year end. The common collective trust is stated at net asset value as determined by the trustee at the end of the Plan year except when holding fully benefit-responsive investment contracts as described below. Purchases and sales of securities are recorded on a trade-date basis. Interest income is recorded on the accrual basis. Dividends are recorded on the ex-dividend date.

The Fidelity Managed Income Portfolio, a common collective trust, has entered into fully benefit-responsive investment contracts to provide preservation of principal, maintain a stable interest rate, and provide liquidity at contract value for participant withdrawals and transfers. For purposes of the Statements of Net Assets Available for Benefits, these investments are stated at fair value, rather than contract value, to the extent they are fully benefit-responsive as well as the adjustment of the fully benefit-responsive investment contracts from fair value to contract value. The Statement of Changes in Net Assets Available for Benefits is prepared on a contract value basis. The fair value of these investments is determined using the market price of the underlying securities and the value of the investment contract.

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Retirement and Savings Plan

Net Appreciation (Depreciation) in Fair Value of Investments

Realized and unrealized appreciation (depreciation) in the fair value of investments is based on the difference between the fair value of the assets at the beginning of the year, or at the time of purchase for assets purchased during the year, and the related fair value on the day investments are sold with respect to realized appreciation (depreciation), or on the last day of the year for unrealized appreciation (depreciation).

Realized and unrealized appreciation (depreciation) is recorded in the accompanying Statement of Changes in Net Assets Available for Benefits as net depreciation in fair value of investments.

Risks and Uncertainties

The Plan provides various funds that hold investment securities. Investment securities are exposed to various risks such as interest rate, market volatility, and credit risks. Due to the level of risk associated with certain investment securities and the level of uncertainty related to changes in the value of investment securities, it is at least reasonably possible that changes in risk in the near term would materially affect participants’ account balances and the amounts reported in the financial statements.

The Plan provides investment options that hold securities of foreign companies, which may involve special risks and considerations not typically associated with investing in U.S. companies. These risks include devaluation of currencies, less reliable information about issuers, different securities transaction clearance and settlement practices, and possible adverse political and economic developments. Moreover, securities of many foreign companies and their markets may be less liquid and their prices more volatile than securities of comparable U.S. companies.

Use of Estimates

The preparation of the financial statements, in conformity with U.S. GAAP, requires management to make estimates and assumptions that affect the financial statements and accompanying notes. Actual results could materially differ from those estimates.

Payment of Benefits

Benefits paid to participants are recorded when paid.

Recently Issued Accounting Pronouncements

In May 2015, the FASB issued accounting guidance that will remove certain disclosures and the requirement to categorize within the fair value hierarchy investments for which fair value is measured using the net asset value per share practical expedient. The guidance should be applied retrospectively to all periods presented and is effective for Plan years beginning after December 15, 2015, with early adoption permitted. Adoption of this new accounting guidance is not expected to have a material impact on the Plan’s financial statements.

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Retirement and Savings Plan

3.         Investments

Participants may invest in certain investments offered by Fidelity Management Trust Company, the trustee and recordkeeper of the Plan, including a unitized common stock fund containing common stock of Reliance Steel & Aluminum Co. and interest bearing cash. At December 31, 2014 and 2013, the Plan held 328,659 and 340,590 unitized shares of Reliance Steel & Aluminum Co. stock fund with fair values of $5,345,114 and $6,657,488, respectively. As of December 31, 2014 and 2013, the Reliance Steel & Aluminum Co. stock fund consisted of 83,676 and 84,286 shares, respectively, of Reliance Steel & Aluminum Co. common shares valued at $5,126,828 and $6,392,250, respectively. At December 31, 2014 and 2013, the fund contained interest-bearing cash of $218,823 and $238,094, respectively, and other receivables of $12 and $27,144, respectively. The fund also contained a benefit claim payable of $549 and $0 at December 31, 2014 and 2013, respectively.

For risks and uncertainties regarding investment in Reliance Steel & Aluminum Co. common stock, participants should refer to the Reliance Steel & Aluminum Co.’s Annual Report on Form 10-K for the year ended December 31, 2014 and the Quarterly Report on Form 10-Q for the quarter ended March 31, 2015.

The following investments represent 5% or more of the Plan’s net assets at December 31, 2014 and 2013:

During the year ended December 31, 2014, the Plan’s investments (including gains and losses on investments bought and sold, as well as held during the year) depreciated in value as follows:

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Retirement and Savings Plan

4.         Fair Value Measurements

The Codification establishes a framework for measuring fair value. That framework provides a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (level 1 measurements) and lowest priority to unobservable inputs (level 3 measurements). The three levels of the fair value hierarchy are described as follows:

Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. An active market for the asset or liability is a market in which the transaction for the asset or liability occurs with sufficient frequency and volume to provide pricing information on an ongoing basis.

Level 2: Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities in markets that are active; quoted market prices in markets that are not active; or model-derived valuations or other inputs that are observable or can be corroborated by observable market data for substantially the full terms of the assets or liabilities.

Level 3: Prices or valuations that require inputs that are both significant to the fair value measurement and unobservable.

The following table sets forth by level, within the fair value hierarchy, the Plan’s investment assets measured at fair value as of December 31, 2014:

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Retirement and Savings Plan

The following table sets forth by level, within the fair value hierarchy, the Plan’s investment assets measured at fair value as of December 31, 2013:

The Plan’s investments that are measured at fair value on a recurring basis, such as the money market fund, mutual funds, and equity securities are generally classified within Level 1 of the fair value hierarchy. The fair values of these investments are based on quoted market prices in active markets. The Plan also invests in a stable value fund held within a common collective trust for which the valuation is based on the values of the underlying investments. Based on the nature of the underlying investments in the common collective trust, the investment asset has been classified as Level 2. The stable value fund has an investment objective to maintain a constant net asset value while generating a slightly higher yield than the money market fund. Generally, there are no restrictions on a participant’s ability to redeem their investment in the common collective trust at the investment’s net asset value (NAV). However, withdrawals prompted by certain events (e.g., termination of the managed income portfolio, changes in laws or regulations) may restrict a participant’s ability to redeem the investment at its NAV.

5.         Related Party Transactions

Certain Plan investments are shares of mutual funds, shares of a common collective trust, shares of a unitized common stock fund and a money market fund managed by Fidelity Management Trust Company. Fidelity Management Trust Company is the trustee and recordkeeper as defined by the Plan and, therefore, transactions in these investments qualify as exempt party-in-interest transactions.

6.         Income Tax Status

The Plan’s Trustee received an advisory letter from the Internal Revenue Service (IRS) dated March 31, 2008 confirming the tax qualification status of the Plan document prototype. Although the Plan has been amended since the date of this letter, the Plan Administrator believes the Plan is being operated in compliance with the applicable requirements of the Code and therefore is tax qualified.

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Retirement and Savings Plan

The Plan Administrator has analyzed the tax positions taken by the Plan, and has concluded that as of December 31, 2014, there are no uncertain positions taken or expected to be taken that would require provision for income taxes in the accompanying financial statements.

7.         Plan Termination

Although it has not expressed any intent to do so, the Company has the right under the Plan to discontinue its contributions at any time and to terminate the Plan subject to the provisions of ERISA. In the event of Plan termination, participants will become 100% vested in their accounts.

8.         Excess Contributions Payable

Excess contributions payable represents amounts owed to participants who made excess contributions based on the compliance testing performed by the Plan’s record keeper. The excess contributions payable balances were returned by the Plan to the participants prior to IRS deadlines.

9.         Reconciliation of Financial Statements to Form 5500

The following is a reconciliation of net assets available for benefits as reported on the Form 5500 with that reported in the accompanying financial statements:

The following is a reconciliation of the changes in net assets available for benefits as reported on the Form 5500 with that reported in the accompanying financial statements:

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Retirement and Savings Plan

Employer Identification Number: 34-1207681

Plan Number: 001

Form Number: 5500

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Retirement and Savings Plan

Employer Identification Number: 34-1207681

Plan Number: 001

Form Number: 5500

* - A party in interest as defined by ERISA.

a - The cost of participant-directed investments is not required to be disclosed.

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Signature

Pursuant to the requirements of the Securities Exchange Act of 1934, the members of the Precision Strip, Inc. Retirement and Savings Plan Committee have duly caused this annual report to be signed on its behalf by the undersigned hereunto duly authorized.

PRECISION STRIP, INC.

RETIREMENT AND SAVINGS PLAN

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