Sir,
Rule 2 (k) of Cenvat Credit Rules, 2004 excludes from the definition of 'inputs' any goods used for -
(a) construction or execution of works contract of a building or a civil structure or a part thereof; or
(b) laying of foundation or making of structures for support of capital goods,
except for the provision of service portion in the execution of a works contract or construction service as listed under clause (b) of section 66E of the Act.
Services listed under Section 66 E (b) of Finance Act, 1994 are " construction of a complex, building, civil structure or a part thereof, including a complex or building intended for sale to a buyer, wholly or partly, except where the entire consideration is received after issuance of completion-certificate by the competent authority.
Therefore in my opinion you are not eligible to take credit of duty paid on reinforcement steel & structure steel