SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                                    FORM 10-Q

   X    QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
        EXCHANGE ACT OF 1934
        For the quarterly period ended March 31, 1998

                                       OR

        TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
        EXCHANGE ACT OF 1934
        For the transition period from __________ to __________

   Commission File Number 1-475

                             A.O. SMITH CORPORATION
 
               Delaware                           39-0619790
        (State of Incorporation)           (IRS Employer ID Number)

                 P.O. Box 23972, Milwaukee, Wisconsin 53223-0972
                            Telephone: (414) 359-4000


   Indicate by check mark whether the registrant (1) has filed all reports
   required to be filed by Section 13 or 15(d) of the Securities Exchange Act
   of 1934 during the preceding 12 months and (2) has been subject to such
   filing requirements for the past 90 days.   Yes  X    No _  


        Class A Common Stock Outstanding as of April 30, 1998:  5,815,774

            Common Stock Outstanding as of April 30, 1998:  9,912,076

                              Exhibit Index Page 12

   
                                      Index

                             A.O. Smith Corporation

   Part I. Financial Information

   Item 1. Financial Statements (Unaudited)

        Condensed Consolidated Statement of Earnings, 
        Comprehensive Earnings and Retained Earnings
        - Three months ended March 31, 1998 and 1997                     3

        Condensed Consolidated Balance Sheet
        - March 31, 1998 and December 31, 1997                           4

        Condensed Consolidated Statements of Cash Flows
        - Three months ended March 31, 1998 and 1997                     5

        Notes to Condensed Consolidated Financial Statements
        - March 31, 1998                                                 6

   Item 2. Management's Discussion and Analysis of Financial
   Condition and Results of Operations                                 7-9


   Part II. Other Information

   Item 1. Legal Proceedings                                            10

   Item 4. Submission of Matters to a Vote of Security Holders          10

   Item 6. Exhibits and Reports on Form 8-K                             10

   Signatures                                                           11

   Index to Exhibits                                                    12

   

   PART I - FINANCIAL INFORMATION
   ITEM 1 - FINANCIAL STATEMENTS

                             A.O. SMITH CORPORATION
                  CONDENSED CONSOLIDATED STATEMENT OF EARNINGS,
                  COMPREHENSIVE EARNINGS AND RETAINED EARNINGS
                   Three months ended March 31, 1998 and 1997
                     (000 omitted except for per share data)
                                   (unaudited)

                                                    Three Months Ended
                                                         March 31
   EARNINGS                                            1998        1997 
   Electric Motor Technologies                     $111,839    $ 93,927 
   Water Systems Technologies                        74,554      70,972 
   Storage & Fluid Handling Technologies             36,562      31,349 
                                                   --------    -------- 
   NET SALES                                        222,955     196,248 
   Cost of products sold                            177,186     153,450 
                                                   --------    -------- 
   Gross profit                                      45,769      42,798 
   Selling, general and administrative expenses      27,900      27,393 
   Interest expense                                   1,624       2,244 
   Interest income                                   (1,712)        (58)
   Other expense - net                                  722         990 
                                                   --------    -------- 
                                                     17,235      12,229 
   Provision for income taxes                         6,038       4,391
                                                   --------    -------- 
   Earnings before equity in loss of 
    joint ventures                                   11,197       7,838
   Equity in loss of joint ventures                  (1,019)       (717)
                                                   --------    -------- 
   EARNINGS FROM CONTINUING OPERATIONS               10,178       7,121 
   EARNINGS FROM DISCONTINUED OPERATIONS
     (less related income tax provision of $6,324)        -      12,790 
                                                   --------    -------- 
   NET EARNINGS                                      10,178      19,911 
   Other comprehensive earnings, net of 
    income tax (note 5):
      Foreign currency translation (less related
       income tax benefit 1998 - $123 and 
       1997 - $204)                                    (189)       (312)
                                                   --------    -------- 
   COMPREHENSIVE EARNINGS                          $  9,989    $ 19,599 
                                                   ========    ========

   RETAINED EARNINGS
   Balance at beginning of period                   466,514     325,361 
   Net earnings                                      10,178      19,911 
   Cash dividends on common shares                   (2,751)     (3,560)
                                                   --------    -------- 
   BALANCE AT END OF PERIOD                        $473,941    $341,712 
                                                   ========    ========
   BASIC EARNINGS PER COMMON SHARE
      Continuing Operations                          $  .63      $  .35 
      Discontinued Operations                           -           .63 
                                                   --------    -------- 
   NET EARNINGS                                      $  .63      $  .98 
                                                   ========    ========
   DILUTED EARNINGS PER COMMON SHARE
      Continuing Operations                          $  .62      $  .34 
      Discontinued Operations                           -           .62 
                                                   --------    -------- 
   NET EARNINGS                                      $  .62      $  .96 
                                                   ========    ========
   DIVIDENDS PER COMMON SHARE                        $  .17      $  .17 


   See accompanying notes to unaudited condensed consolidated financial
   statements.

   

   PART I--FINANCIAL INFORMATION
   ITEM 1--FINANCIAL STATEMENTS

                             A.O. SMITH CORPORATION
                      CONDENSED CONSOLIDATED BALANCE SHEET
                      March 31, 1998 and December 31, 1997
                                  (000 omitted)

                                             (unaudited)
                                               March 31,   December 31,
                                                   1998           1997
   ASSETS
   CURRENT ASSETS
   Cash and cash equivalents (note 2)          $110,287       $145,896 
   Receivables                                  144,163        126,232 
   Inventories (note 3)                          79,132         79,049 
   Deferred income taxes                         10,937         11,849 
   Other current assets                           4,511          2,702 
                                               --------       --------
   TOTAL CURRENT ASSETS                         349,030        365,728

   Property, plant and equipment                454,745        450,147 
   Less accumulated depreciation                246,478        242,391 
                                               --------       --------
   Net property, plant and equipment            208,267        207,756
   Investments in and advances 
    to joint ventures                            27,237         25,605 
   Other assets                                  67,559         65,644 
   Goodwill                                      51,354         51,783 
                                               --------       --------
   TOTAL ASSETS                                $703,447       $716,516
                                               ========       ========

   LIABILITIES AND STOCKHOLDERS' EQUITY

   CURRENT LIABILITIES
   Trade payables                              $ 63,718       $ 61,299 
   Accrued payroll and benefits                  22,683         26,397 
   Product warranty                               8,188          7,972 
   Accrued income taxes                           8,044          6,607 
   Long-term debt due within one year             5,598          5,590 
   Other current liabilities                     21,850         20,017 
                                               --------       --------
   TOTAL CURRENT LIABILITIES                    130,081        127,882 

   Long-term debt (note 4)                      101,605        100,972 
   Other liabilities                             56,285         59,515 
   Deferred income taxes                         28,650         28,442 

   STOCKHOLDERS' EQUITY:
   Class A common stock, $5 par value: 
    authorized 14,000,000 shares; 
    issued 5,838,334                             29,192         29,192 
   Common stock, $1 par value: 
    authorized 60,000,000 shares;
    issued 15,861,316                            15,861         15,861 
   Capital in excess of par value                72,729         72,542 
   Retained earnings (note 4)                   473,941        466,514 
   Cumulative foreign currency translation
    adjustments (note 5)                         (1,891)        (1,579)
   Treasury stock at cost                      (203,006)      (182,825)
                                               --------       --------
   TOTAL STOCKHOLDERS' EQUITY                   386,826        399,705 
   TOTAL LIABILITIES AND STOCKHOLDERS'
   EQUITY                                      $703,447       $716,516 
                                               ========       ========

   See accompanying notes to unaudited condensed consolidated financial
   statements

   

   PART I--FINANCIAL INFORMATION
   ITEM 1--FINANCIAL STATEMENTS

                             A.O. SMITH CORPORATION
                 CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS
                   Three months ended March 31, 1998 and 1997
                                  (000 omitted)
                                   (unaudited)

                                                     Three Months Ended
                                                          March 31
                                                        1998       1997
   CASH FLOW FROM OPERATING ACTIVITIES

   CONTINUING
   Net earnings                                     $ 10,178   $  7,121
   Adjustments to reconcile net earnings to 
    net cash provided by operating activities:
      Depreciation and amortization                    6,919      6,126
      Deferred income taxes                            1,120     (1,235)
      Equity in loss of joint ventures                 1,019        717
      Net change in current assets 
       and liabilities                               (15,631)   (22,927)

      Net change in noncurrent assets 
       and liabilities                                (6,423)     4,341
      Other                                              266        130
                                                    --------   --------
   CASH USED BY OPERATING ACTIVITIES                  (2,552)    (5,727)
                                                    --------   --------
   INVESTING ACTIVITIES
   Capital expenditures                               (6,942)   (11,052)
   Capitalized purchased software costs                 (308)      (240)
   Investment in joint ventures                       (2,652)    (3,451)
   Acquisition of business (net of cash acquired)          -    (60,443)
                                                    --------   --------
   CASH USED BY INVESTING ACTIVITIES                  (9,902)   (75,186)
                                                    --------   --------
   CASH USED BY CONTINUING OPERATIONS
      BEFORE FINANCING ACTIVITIES                    (12,454)   (80,913)

   DISCONTINUED
   Cash used by discontinued operations
      before financing activities                       (814)  (112,285)

   FINANCING ACTIVITIES
   Long-term debt incurred                               641    241,940
   Long-term debt retired                                  -     (4,675)
   Purchase of common stock held in treasury         (20,231)   (46,828)
   Proceeds from common stock options exercised            -      2,432
   Tax benefit from exercise of stock options              -        287
   Dividends paid                                     (2,751)    (3,560)
                                                    --------   --------
   CASH PROVIDED/(USED) BY FINANCING ACTIVITIES      (22,341)   189,596
                                                    --------   --------
   Net decrease in cash and cash equivalents         (35,609)    (3,602)
   Cash and cash equivalents-beginning of period     145,896      6,405
                                                    --------   --------
   CASH AND CASH EQUIVALENTS AT END OF PERIOD       $110,287   $  2,803
                                                    ========   ========

   See accompanying notes to unaudited condensed consolidated financial
   statements.

   
                             A.O. SMITH CORPORATION
              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                                 March 31, 1998
                                   (unaudited)

   1.   Basis of Presentation
        The financial statements presented herein are based on interim
        figures and are subject to audit.  In the opinion of management, all
        adjustments consisting of normal accruals considered necessary for
        fair presentation of the results of operations and of financial
        position have been made.  The results of operations for the three-
        month period ended March 31, 1998 are not necessarily indicative of
        the results expected for the full year.  The consolidated balance
        sheet as of December 31, 1997 is derived from the audited financial
        statements but does not include all disclosures required by generally
        accepted accounting principles.  Certain prior year amounts have been
        reclassified to conform to the 1998 presentation.

   2.   Statement of Cash Flows
        For purposes of the Consolidated Statement of Cash Flows, cash and
        cash equivalents include short-term investments held primarily for
        cash management purposes.  These investments normally mature within
        three months from the date of acquisition.

   3.   Inventories
        (000 omitted)                  March 31, 1998    December 31, 1997
        Finished products                 $ 43,993           $ 45,091
        Work in process                     18,685             19,656
        Raw materials                       45,093             42,870
        Supplies                             1,615              1,634
                                          --------           --------
                                           109,386            109,251
        Allowance to state inventories
         at LIFO cost                       30,254             30,202
                                          --------           --------
                                          $ 79,132           $ 79,049
                                          ========           ========
  
 4.   Long-Term Debt
        The company's long-term credit agreements contain certain conditions
        and provisions which restrict the company's payment of dividends. 
        Under the most restrictive of these provisions, retained earnings of
        $68.7 million were unrestricted as of March 31, 1998 for cash
        dividends and treasury stock purchases.

   5.   Comprehensive Earnings
        The company has adopted Statement of Financial Accounting Standards
        (SFAS) No. 130, "Reporting Comprehensive Income", which establishes
        the standards for reporting and displaying comprehensive earnings and
        its components as part of a full set of financial statements.  The
        company's other comprehensive income consists solely of foreign
        currency translation adjustments, which is disclosed separately in
        the Condensed Consolidated Statement of Earnings, Comprehensive
        Earnings, and Retained Earnings, as well as the Stockholders' Equity
        section of the Condensed Consolidated Balance Sheet.


   ITEM 2 - MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
            CONDITION AND RESULTS OF OPERATIONS

   RESULTS OF OPERATIONS
   FIRST THREE MONTHS OF 1998 COMPARED TO 1997

   Sales were $223.0 million in the first quarter of 1998, an increase of
   approximately 14% over sales in the first quarter of 1997.  Excluding the
   sales of UPPCO, the manufacturer of subfractional motors acquired on March
   31, 1997, revenues increased $10.0 million or 5% compared with 1997 as a
   result of a 5% increase in sales at Water Systems and a 17% increase at
   Storage & Fluid Handling.  

   First quarter earnings of $10.2 million were $3.1 million or 43% higher
   than 1997 earnings due to improvements at Storage & Fluid Handling and
   Water Systems, as well as higher interest income.  On a per share basis,
   first quarter diluted earnings increased from $.34 to $.62 per share,
   reflecting the improvement in net earnings and the benefit of the
   company's continuing share repurchase program.

   The company's gross profit margin for the first quarter was 20.5%, 
   compared with a margin of 21.8% in 1997.  Lower margins were primarily due
   to lower relative margins at UPPCO and lower pricing in the Electric Motor
   Technologies segment.

   Sales in the first quarter for Electric Motor Technologies were $111.8
   million, or $17.9 million higher than the same period last year. 
   Excluding UPPCO, sales for the segment were flat compared to the first
   quarter of 1997, as increased sales in the pump and international business
   units offset a decline in the HVAC and after-market motor businesses.  

   First quarter operating profits for Electric Motor Technologies were
   essentially flat compared to the first quarter of 1997.  Earnings on UPPCO
   product were offset by lower prices and unfavorable product mix.

   Water Systems Technologies sales were $74.6  million in the first quarter
   of 1998, or $3.6 million higher than 1997 sales of $71.0 million. 
   Overall, unit volumes for both residential and commercial water heaters
   increased 8% during the quarter.  Sales increased 5%, reflecting the
   continued difficult pricing environment in the residential water heater
   marketplace.  First quarter profits for Water Systems Technologies were
   modestly higher compared with 1997.

   First quarter sales for Storage & Fluid Handling Technologies were $36.6
   million or 17% higher than the same period in 1997.  Both units in this
   segment experienced solid increases in sales, with improvements in dry and
   liquid storage tank sales, as well as stronger sales of fiberglass pipe
   for petroleum production and service station applications.  First quarter
   profits were significantly higher than the same period last year as a
   result of higher volumes and lower segment selling, general and
   administrative (SG&A) expenses.

   Overall, SG&A expenses for the first quarter of 1998 were slightly higher
   than the same period of 1997.  As a percent of sales, SG&A expenses
   decreased from 14.0% in 1997 to 12.5% in 1998 as a result of lower
   administrative expense at both corporate and operating unit levels.

   The company recognized net interest income of $0.1 million in the first
   quarter of 1998, compared with net interest expense of  $2.2 million in
   1997.  Investment of the proceeds from the sale of the company's
   automotive products division in April 1997 generated $1.7 million of
   interest income during the quarter.

   The first quarter effective tax rate was  35.0% in 1998, compared with a
   rate of 35.9% in 1997.  The 1998 rate benefited from the impact of the
   company's foreign sales corporation as well as research and development
   tax credits.

   After-tax equity in losses of the company's Chinese joint ventures was
   $1.0 million in the first quarter of 1998, or $0.3 million higher than the
   same period in 1997, and is attributable to additional start up costs
   associated with the new water heating plant in Nanjing.  The company
   expects current year losses in this operating unit to be comparable to the
   prior year.

   During 1997, the Financial Accounting Standards Board issued several
   Statements of Financial Accounting Standards ("SFAS") that are effective
   for the company in 1998.  SFAS No. 130, "Reporting Comprehensive Income"
   is effective for the company as of January 1, 1998 and has been
   incorporated into the company's financial statements.  SFAS No. 131,
   "Disclosure about Segments of an Enterprise and Related Information" is
   effective for the company for 1998.  Neither of the statements will have
   any impact on A.O. Smith Corporation's results of operations, financial
   position or cash flows.

   During the first three months of 1998, the company was a party to futures
   contracts for the purposes of hedging a portion of certain raw material
   purchases.  The company was also a party to forward foreign exchange
   contracts to hedge foreign currency transactions consistent with its
   committed exposures.  Had these contracts not been in place, the net
   earnings of the company would not have been materially affected.

   Liquidity & Capital Resources

   The company's working capital was $218.9 million at March 31, 1998
   compared with $237.8 million at December 31, 1997, a decline of $18.9
   million.  The reduction was primarily attributable to cash and cash
   equivalents which were $35.6 million lower at March 31, 1998 than at year
   end 1997.  The decline in cash was primarily the result of stock
   repurchases in the amount of $20.2 million and a $17.9 million sales-
   related increase in accounts receivable.  Cash flow from operations was
   $68.5 million higher than the same period last year primarily due to the
   $60 million acquisition of UPPCO in the first quarter of 1997 and lower
   capital expenditures during the first three months of this year compared
   with last year.

   Capital expenditures during the first quarter totaled $6.9 million
   compared with $11.1 million during the same period last year.  The company
   expects lower capital spending in 1998 compared with 1997, and expects
   such capital expenditures to be covered by 1998 operating cash flow.

   The company repurchased 478,300 shares of its common stock during the
   first quarter of 1998 under the company's ongoing stock repurchase
   program.  Since the program's inception in January of 1997, approximately
   5.3 million shares have been repurchased.  As of the end of the first
   quarter, $37.2 million remained of the $50 million authorization granted
   in December of 1997.

   At its April 9, 1998 meeting, A. O. Smith's Board of Directors declared a
   regular quarterly dividend at $.17 per share on its common stock (Classes
   A and Common).  The dividend is payable on May 15, 1998 to shareholders of
   record April 30, 1998.

   Forward Looking Statements

   Certain statements in this report are forward-looking statements. 
   Although the company believes that its expectations are based upon
   reasonable assumptions within the bounds of its knowledge of its business,
   there can be no assurance that its financial goals will be realized. 
   Although a significant portion of the company's sales are derived from the
   replacement of previously installed product and such sales are therefore
   less volatile, numerous factors may affect actual results and may cause
   results to differ materially from those expressed in forward-looking
   statements made by or on behalf of the company.  Among such numerous
   factors the company includes the continued growth of the worldwide
   heating, ventilating and air conditioning market, the stability of the
   pricing environment for residential water heaters and the successful
   implementation of the company's joint venture strategies in China.


   PART II - OTHER INFORMATION
   ITEM 1 - LEGAL PROCEEDINGS

   The company is involved in various unresolved legal actions,
   administrative proceedings and claims in the ordinary course of its
   business involving product liability, property damage, insurance coverage,
   patents and environmental matters including the disposal of hazardous
   waste. Although it is not possible to predict with certainty the outcome
   of these unresolved legal actions or the range of possible loss or
   recovery, the company believes these unresolved legal actions will not
   have a material effect on its financial position or results of operations.

   There have been no material changes in the environmental matters
   previously reported in Part 1, Item 3 and Note 12 of the Notes to
   Consolidated Financial Statements in the company's annual report on
   Form 10-K Report for the year ended December 31, 1997, which is
   incorporated herein by reference.


   ITEM 4 - SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

   None.

   ITEM 6 - EXHIBITS AND REPORTS ON FORM 8-K

   (a)  Exhibits

        (27.1) Financial Data Schedule
        (27.2) Restated Financial Data Schedule

   (b)  Reports on Form 8-K

        No reports on Form 8-K were filed by the company in the first quarter
        of 1998.

   

                                  SIGNATURES

   Pursuant to the requirements of the Securities Exchange Act of 1934, the
   registrant has duly caused this report to be signed on its behalf by the
   undersigned thereunto duly authorized.

                                   A. O. SMITH CORPORATION


   May 11, 1998                    /s/John J. Kita    
                                      John J. Kita
                                      Vice President,
                                      Treasurer and Controller


   May 11, 1998                   /s/G. R. Bomberger 
                                     G. R. Bomberger
                                     Executive Vice President
                                     and Chief Financial Officer

   
                           INDEX TO EXHIBITS

   Exhibit
   Number         Description

   (27.1)      Financial Data Schedule
   (27.2)      Restated Financial Data Schedule

 

5 THE SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS OF A.O. SMITH CORPORATION AS OF AND FOR THE PERIOD ENDED MARCH 31, 1998 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS. 1,000 3-MOS DEC-31-1998 JAN-01-1998 MAR-31-1998 3,907 106,380 144,163 0 79,132 349,030 454,745 (246,478) 703,447 130,081 101,605 0 0 45,053 341,773 703,447 222,955 222,955 177,186 177,186 26,910 0 1,624 17,235 6,038 10,178 0 0 0 10,178 0.63 0.62
 

5 THE SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE CONSOLIDATED FINANCIAL STATEMENTS OF A.O. SMITH CORPORATION AS OF AND FOR THE PERIOD ENDED MARCH 31, 1997 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS. 1,000 3-MOS DEC-31-1997 JAN-01-1997 MAR-31-1997 2,803 0 140,304 0 89,566 342,418 420,598 (228,473) 1,077,380 119,832 479,396 0 0 45,060 351,305 1,077,380 196,248 196,248 153,450 153,450 28,325 0 2,244 12,229 4,391 7,121 12,790 0 0 19,911 0.98 0.96