FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person *   Ding Wei 2. Date of Event Requiring Statement (Month/Day/Year) 01/01/2013 3. Issuer Name and Ticker or Trading Symbol SMITH A O CORP [AOS] (Last) (First) (Middle) A. O. SMITH (CHINA) WATER HEATER CO. LTD, 336 YAO XIN AVENUE 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) President and GM, AOSCWHC 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) NANJING, F3 210038 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	  (1)	  (1)	Common Stock	1,900	$ 0	D	Â
Employee Stock Options (Right to Buy)	  (2)	  (2)	Common Stock	4,350	$ 0	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Ding Wei A. O. SMITH (CHINA) WATER HEATER CO. LTD 336 YAO XIN AVENUE NANJING, F3 210038	Â	Â	  President and GM, AOSCWHC	Â

Signatures

James F. Stern, Attorney-in-Fact for Wei Ding		01/10/2013
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Restricted stock units were granted under the A. O. Smith Combined Incentive Compensation Plan, a transaction exempt under Rule 16b-3: 600 restricted stock units were granted on 02/08/2010; 500 restricted stock units were granted on 02/07/2011; and 800 restricted stock units were granted on 02/13/2012. The restricted stock units become payable in Common Stock on the vesting date, which is three years after the grant date.
(2)	Employee stock options were granted under the A. O. Smith Combined Incentive Compensation Plan, a transaction exempt under Rule 16b-3: 1,650 employee stock options were granted on 02/08/2010 and became exercisable in three annual installments of 1/3 of the award starting on 02/08/2011. Of the 1,650 options granted 1,100 options have been exercised and 550 options remain; 1,400 employee stock options were granted on 02/07/2011 and became exercisable in three annual installments of 1/3 of the award starting on 02/07/2012; 2,400 employee stock options were granted on 02/13/2012 and become exercisable in three annual installments of 1/3 of the award starting on 02/13/2013. All employee stock options expire ten years after the date of the award.

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