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        <filerInfo>
            <filer>
                <filerCredentials>
                    <cik>0001756183</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
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    <formData>
        <issuerInfo>
            <issuerCik>0000017843</issuerCik>
            <issuerName>CARPENTER TECHNOLOGY CORPORATION</issuerName>
            <secFileNumber>001-05828</secFileNumber>
            <issuerAddress>
                <ns2:street1>1735 Market Street, 15th Floor</ns2:street1>
                <ns2:city>Philadelphia</ns2:city>
                <ns2:stateOrCountry>PA</ns2:stateOrCountry>
                <ns2:zipCode>19103</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>610-208-2000</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Brian J. Malloy</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Officer</relationshipToIssuer>
            </relationshipsToIssuer>
        </issuerInfo>
        <securitiesInformation>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <brokerOrMarketmakerDetails>
                <name>Morgan Stanley Smith Barney LLC</name>
                <address>
                    <ns2:street1>1 New York Plaza</ns2:street1>
                    <ns2:street2>38th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>10372</noOfUnitsSold>
            <aggregateMarketValue>619090.16</aggregateMarketValue>
            <noOfUnitsOutstanding>48550179</noOfUnitsOutstanding>
            <approxSaleDate>07/31/2023</approxSaleDate>
            <securitiesExchangeName>NYSE</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>08/03/2018</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>1172</amountOfSecuritiesAcquired>
            <paymentDate>08/03/2018</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>06/30/2019</acquiredDate>
            <natureOfAcquisitionTransaction>Performance Shares</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>1247</amountOfSecuritiesAcquired>
            <paymentDate>06/30/2019</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>06/30/2018</acquiredDate>
            <natureOfAcquisitionTransaction>Performance Shares</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>925</amountOfSecuritiesAcquired>
            <paymentDate>06/30/2018</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>07/18/2018</acquiredDate>
            <natureOfAcquisitionTransaction>Performance Shares</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>1585</amountOfSecuritiesAcquired>
            <paymentDate>07/18/2018</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>08/01/2019</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>5076</amountOfSecuritiesAcquired>
            <paymentDate>08/01/2019</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>08/06/2019</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>367</amountOfSecuritiesAcquired>
            <paymentDate>08/06/2019</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>07/31/2023</noticeDate>
            <planAdoptionDates/>
            <signature>/s/ Brian Malloy</signature>
        </noticeSignature>
    </formData>
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144
0001756183
XXXXXXXX
LIVE
0000017843
CARPENTER TECHNOLOGY CORPORATION
001-05828
1735 Market Street, 15th Floor
Philadelphia
PA
19103
610-208-2000
Brian J. Malloy
Officer
Common
Morgan Stanley Smith Barney LLC
1 New York Plaza
38th Floor
New York
NY
10004
10372
619090.16
48550179
07/31/2023
NYSE
Common
08/03/2018
Restricted Stock
Issuer
N
1172
08/03/2018
Not Applicable
Common
06/30/2019
Performance Shares
Issuer
N
1247
06/30/2019
Not Applicable
Common
06/30/2018
Performance Shares
Issuer
N
925
06/30/2018
Not Applicable
Common
07/18/2018
Performance Shares
Issuer
N
1585
07/18/2018
Not Applicable
Common
08/01/2019
Restricted Stock
Issuer
N
5076
08/01/2019
Not Applicable
Common
08/06/2019
Restricted Stock
Issuer
N
367
08/06/2019
Not Applicable
Y
07/31/2023
/s/ Brian Malloy