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            <filer>
                <filerCredentials>
                    <cik>0001752632</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



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    </headerData>
    <formData>
        <issuerInfo>
            <issuerCik>0000017843</issuerCik>
            <issuerName>CARPENTER TECHNOLOGY CORPORATION</issuerName>
            <secFileNumber>001-05828</secFileNumber>
            <issuerAddress>
                <ns2:street1>1735 Market Street</ns2:street1>
                <ns2:street2>15th Floor</ns2:street2>
                <ns2:city>Philadelphia</ns2:city>
                <ns2:stateOrCountry>PA</ns2:stateOrCountry>
                <ns2:zipCode>19103</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>610-208-2000</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>ELIZABETH A. SOCCI</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Officer</relationshipToIssuer>
            </relationshipsToIssuer>
        </issuerInfo>
        <securitiesInformation>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <brokerOrMarketmakerDetails>
                <name>Morgan Stanley Smith Barney LLC Executive Financial Services</name>
                <address>
                    <ns2:street1>1 New York Plaza</ns2:street1>
                    <ns2:street2>8th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>5000</noOfUnitsSold>
            <aggregateMarketValue>1010921.00</aggregateMarketValue>
            <noOfUnitsOutstanding>49779343</noOfUnitsOutstanding>
            <approxSaleDate>05/01/2025</approxSaleDate>
            <securitiesExchangeName>NYSE</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>08/17/2023</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>804</amountOfSecuritiesAcquired>
            <paymentDate>08/17/2023</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>07/19/2018</acquiredDate>
            <natureOfAcquisitionTransaction>Performance Shares</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>322</amountOfSecuritiesAcquired>
            <paymentDate>07/19/2018</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>08/15/2024</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>619</amountOfSecuritiesAcquired>
            <paymentDate>08/15/2024</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>08/15/2023</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>478</amountOfSecuritiesAcquired>
            <paymentDate>08/15/2023</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>08/06/2018</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>242</amountOfSecuritiesAcquired>
            <paymentDate>08/06/2018</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>08/16/2024</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>394</amountOfSecuritiesAcquired>
            <paymentDate>08/16/2024</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>08/16/2023</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>499</amountOfSecuritiesAcquired>
            <paymentDate>08/16/2023</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>06/30/2024</acquiredDate>
            <natureOfAcquisitionTransaction>Performance Shares</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>1642</amountOfSecuritiesAcquired>
            <paymentDate>06/30/2024</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>05/01/2025</noticeDate>
            <planAdoptionDates/>
            <signature>/s/ Elizabeth A. Socci</signature>
        </noticeSignature>
    </formData>
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144
0001752632
XXXXXXXX
LIVE
0000017843
CARPENTER TECHNOLOGY CORPORATION
001-05828
1735 Market Street
15th Floor
Philadelphia
PA
19103
610-208-2000
ELIZABETH A. SOCCI
Officer
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
5000
1010921.00
49779343
05/01/2025
NYSE
Common
08/17/2023
Restricted Stock
Issuer
N
804
08/17/2023
Not Applicable
Common
07/19/2018
Performance Shares
Issuer
N
322
07/19/2018
Not Applicable
Common
08/15/2024
Restricted Stock
Issuer
N
619
08/15/2024
Not Applicable
Common
08/15/2023
Restricted Stock
Issuer
N
478
08/15/2023
Not Applicable
Common
08/06/2018
Restricted Stock
Issuer
N
242
08/06/2018
Not Applicable
Common
08/16/2024
Restricted Stock
Issuer
N
394
08/16/2024
Not Applicable
Common
08/16/2023
Restricted Stock
Issuer
N
499
08/16/2023
Not Applicable
Common
06/30/2024
Performance Shares
Issuer
N
1642
06/30/2024
Not Applicable
Y
05/01/2025
/s/ Elizabeth A. Socci