<?xml version="1.0" encoding="UTF-8" standalone="no"?><!--IFFIndAs--><xbrli:xbrl xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:in-capmkt="http://www.sebi.gov.in/xbrl/2025-01-31/in-capmkt" xmlns:in-capmkt-ent="http://www.sebi.gov.in/xbrl/IntegratedFinance_IndAS/2025-01-31/in-capmkt/in-capmkt-ent" xmlns:in-capmkt-roles="http://www.sebi.gov.in/xbrl/IntegratedFinance_IndAS/2025-01-31/in-capmkt-roles" xmlns:in-capmkt-types="http://www.sebi.gov.in/xbrl/2025-01-31/in-capmkt-types" xmlns:iso4217="http://www.xbrl.org/2003/iso4217" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:negated="http://www.xbrl.org/2009/role/negated" xmlns:net="http://www.xbrl.org/2009/role/net" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xl="http://www.xbrl.org/2003/XLink" xmlns:xlink="http://www.w3.org/1999/xlink"><link:schemaRef xlink:href="in-capmkt-ent-2025-01-31.xsd" xlink:type="simple"/><xbrli:context id="OneD"><xbrli:entity><xbrli:identifier scheme="http://www.bseindia.com/in-capmkt/Symbol">SAMBHV</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2025-04-01</xbrli:startDate><xbrli:endDate>2025-06-30</xbrli:endDate></xbrli:period></xbrli:context><xbrli:context id="OneExpenses1D"><xbrli:entity><xbrli:identifier scheme="http://www.bseindia.com/in-capmkt/Symbol">SAMBHV</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2025-04-01</xbrli:startDate><xbrli:endDate>2025-06-30</xbrli:endDate></xbrli:period><xbrli:scenario><xbrldi:explicitMember dimension="in-capmkt:DetailsOfOtherExpensesAxis">in-capmkt:OtherExpenses1Member</xbrldi:explicitMember></xbrli:scenario></xbrli:context><xbrli:context id="D_ItemsThatWillNotBeReclassifiedToProfitAndLoss11"><xbrli:entity><xbrli:identifier scheme="http://www.bseindia.com/in-capmkt/Symbol">SAMBHV</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2025-04-01</xbrli:startDate><xbrli:endDate>2025-06-30</xbrli:endDate></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:ItemsThatWillNotBeReclassifiedToProfitAndLossAxis"><in-capmkt:ItemsThatWillNotBeReclassifiedToProfitAndLossDomain>ItemsThatWillNotBeReclassifiedToProfitAndLoss1</in-capmkt:ItemsThatWillNotBeReclassifiedToProfitAndLossDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:unit id="INR"><xbrli:measure>iso4217:INR</xbrli:measure></xbrli:unit><xbrli:unit id="INRPerShare"><xbrli:divide><xbrli:unitNumerator><xbrli:measure>iso4217:INR</xbrli:measure></xbrli:unitNumerator><xbrli:unitDenominator><xbrli:measure>xbrli:shares</xbrli:measure></xbrli:unitDenominator></xbrli:divide></xbrli:unit><in-capmkt:ScripCode contextRef="OneD">544430</in-capmkt:ScripCode><in-capmkt:Symbol contextRef="OneD">SAMBHV</in-capmkt:Symbol><in-capmkt:MSEISymbol contextRef="OneD">NOTLISTED</in-capmkt:MSEISymbol><in-capmkt:ISIN contextRef="OneD">INE12NJ01018</in-capmkt:ISIN><in-capmkt:NameOfTheCompany contextRef="OneD">SAMBHV STEEL TUBES LIMITED</in-capmkt:NameOfTheCompany><in-capmkt:TypeOfCompany contextRef="OneD">Main Board</in-capmkt:TypeOfCompany><in-capmkt:ClassOfSecurity contextRef="OneD">Equity</in-capmkt:ClassOfSecurity><in-capmkt:DateOfStartOfFinancialYear contextRef="OneD">2025-04-01</in-capmkt:DateOfStartOfFinancialYear><in-capmkt:DateOfEndOfFinancialYear contextRef="OneD">2026-03-31</in-capmkt:DateOfEndOfFinancialYear><in-capmkt:DateOfBoardMeetingWhenFinancialResultsWereApproved contextRef="OneD">2025-07-24</in-capmkt:DateOfBoardMeetingWhenFinancialResultsWereApproved><in-capmkt:DateOnWhichPriorIntimationOfTheMeetingForConsideringFinancialResultsWasInformedToTheExchange contextRef="OneD">2025-07-21</in-capmkt:DateOnWhichPriorIntimationOfTheMeetingForConsideringFinancialResultsWasInformedToTheExchange><in-capmkt:DescriptionOfPresentationCurrency contextRef="OneD">INR</in-capmkt:DescriptionOfPresentationCurrency><in-capmkt:LevelOfRounding contextRef="OneD">Millions</in-capmkt:LevelOfRounding><in-capmkt:TypeOfReportingPeriod contextRef="OneD">Quarterly</in-capmkt:TypeOfReportingPeriod><in-capmkt:ReportingQuarter contextRef="OneD">First quarter</in-capmkt:ReportingQuarter><in-capmkt:IsCompanyReportingMultisegmentOrSingleSegment contextRef="OneD">Single segment</in-capmkt:IsCompanyReportingMultisegmentOrSingleSegment><in-capmkt:DescriptionOfSingleSegment contextRef="OneD">The Company is in the business of manufacturing steel products having similar economic characteristics, primarily with operations in India. 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The above unaudited standalone financial results of Sambhv Steel Tubes Limited (formerly known as Sambhv Steel Tubes Private Limited and Sambhv Sponge Power Private Limited) ('the Company') for the quarter ended June 30, 2025 have been reviewed by the Audit Committee and approved by the Board of Directors at it's meeting held on July 24, 2025. Statement of Unaudited Standalone Financial Results for the quarter ended June 30, 2025 can be viewed on websites of the Company, National Stock Exchange of India Ltd. and BSE Ltd. at www.sambhv.com, www.nseindia.com and www.bseindia.com respectively. &lt;BR&gt; 
 &lt;BR&gt; 
2. The above unaudited standalone financial results have been prepared in accordance with Indian Accounting Standards (Ind AS) notified under Section 133 of Companies Act, 2013, read together with the Companies (Indian Accounting Standard) Rules, 2015 (as amended). &lt;BR&gt; 
 &lt;BR&gt; 
3. Subsequent to the quarter ended June 30, 2024, the Company has completed Initial Public Offer ('IPO') of 6,58,64,549 equity shares of face value of INR 10 each, aggregating to INR 5,400.00 million, comprising of fresh issue of 5,36,69,429 shares, out of which 5,34,46,115 equity shares were issued at an offer price of INR 82 per equity share to all the allottees and 2,23,314 equity shares were issued at an offer price of INR 78 per equity share, after a discount of INR 4 per equity share to employees, which aggregates to INR 4,400.00 million and offer for sale of 1,21,95,120 equity shares by the selling shareholders aggregating to INR 1,000.00 million. Pursuant to the IPO, the equity shares of the Company were listed on the National Stock Exchange ('NSE') and Bombay Stock Exchange ('BSE') on July 2, 2025.  &lt;BR&gt; 
 &lt;BR&gt; 
4.The figures for the quarter ended June 30, 2024 included in the financial results were not subject to audit or review by the statutory auditors. However, the Management has exercised necessary diligence to ensure that the financial results for these periods provide a true and fair view of the Company affairs. &lt;BR&gt; 
 &lt;BR&gt; 
5.The Company is in the business of manufacturing steel products having similar economic characteristics, primarily with operations in India. Hence, there is one operating segment. &lt;BR&gt; 
 &lt;BR&gt; 
6. During the quarter ended June 30, 2025, as per the Board of Directors Meeting held On May 21, 2025, a resolution was passed to divest the Company’s interest in Clean Max Opia Pvt. Ltd. ('CMOPL'). This decision was taken due to CMOPL’s non-fulfilment of its obligations under Article 3 of the Energy Supply Agreement dated September 20, 2024, specifically its failure to acquire the requisite land and to obtain Stage II connectivity approval for the project. Pursuant to the above resolution, the Company entered into a Share Purchase Agreement on May 27, 2025, with Clean Max Enviro Energy Solutions Pvt. Ltd. ('Clean Max') and CMOPL for the sale of its entire shareholding in CMOPL back to Clean Max. Consequently, CMOPL was Associate till May 29, 2025.</in-capmkt:DisclosureOfNotesOnFinancialResultsExplanatoryTextBlock><in-capmkt:DescriptionOfOtherExpenses contextRef="OneExpenses1D">Expenses</in-capmkt:DescriptionOfOtherExpenses><in-capmkt:OtherExpenses contextRef="OneExpenses1D" decimals="-4" unitRef="INR">654640000</in-capmkt:OtherExpenses><in-capmkt:DescriptionOfItemThatWillNotBeReclassifiedToProfitAndLoss contextRef="D_ItemsThatWillNotBeReclassifiedToProfitAndLoss11">Remeasurement gains / (losses) on the defined benefit plans</in-capmkt:DescriptionOfItemThatWillNotBeReclassifiedToProfitAndLoss><in-capmkt:AmountOfItemThatWillNotBeReclassifiedToProfitAndLoss contextRef="D_ItemsThatWillNotBeReclassifiedToProfitAndLoss11" decimals="-4" unitRef="INR">1220000</in-capmkt:AmountOfItemThatWillNotBeReclassifiedToProfitAndLoss><in-capmkt:AmountOfItemThatWillNotBeReclassifiedToProfitAndLoss contextRef="OneD" decimals="-4" unitRef="INR">1220000</in-capmkt:AmountOfItemThatWillNotBeReclassifiedToProfitAndLoss><in-capmkt:IncomeTaxRelatingToItemsThatWillNotBeReclassifiedToProfitOrLoss contextRef="OneD" decimals="-4" unitRef="INR">310000</in-capmkt:IncomeTaxRelatingToItemsThatWillNotBeReclassifiedToProfitOrLoss><in-capmkt:IncomeTaxRelatingToItemsThatWillBeReclassifiedToProfitOrLoss contextRef="OneD" decimals="-6" unitRef="INR">0</in-capmkt:IncomeTaxRelatingToItemsThatWillBeReclassifiedToProfitOrLoss><in-capmkt:OtherComprehensiveIncome contextRef="OneD" decimals="-4" unitRef="INR">910000</in-capmkt:OtherComprehensiveIncome></xbrli:xbrl>