Raw material test in steel tax classification: oxygen used only as a refining agent did not qualify for concessional tax.

Oxygen gas used in steel manufacture did not qualify as raw material for concessional tax under Section 13(1)(b) of the Bihar Finance Act, 1981, because it functioned only as a refining agent to reduce carbon content and improve product quality. Applying the test that a raw material must be essential and indispensable to the manufacturing process itself, the tax concession was unavailable and the higher rate applied. The Supreme Court also stated that the High Court should not interfere under Article 226 with concurrent technical findings accepted by the assessing, appellate and revisional authorities absent legal error or jurisdictional infirmity.

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Issues: (i) Whether oxygen gas supplied for use in steel manufacture was a raw material entitled to concessional tax under Section 13(1)(b) of the Bihar Finance Act, 1981. (ii) Whether the High Court was justified in interfering under Article 226 of the Constitution of India with concurrent factual findings that oxygen was only a refining agent.

Issue (i): Whether oxygen gas supplied for use in steel manufacture was a raw material entitled to concessional tax under Section 13(1)(b) of the Bihar Finance Act, 1981.

Analysis: The statutory concession depended on the oxygen being used as raw material. The expert committee's report, accepted by the assessing authority and the appellate and revisional authorities, found that oxygen did not form a direct raw material of steel production. Its function was to reduce carbon content in the refining stage and improve the quality of the product. Applying the governing test, an ingredient is raw material only when it is essential and indispensable to the manufacturing process as such, and not merely an aid or ancillary input.

Conclusion: Oxygen gas was not a raw material for steel manufacture and the concessional rate of tax was not available; the higher tax rate was payable.

Issue (ii): Whether the High Court was justified in interfering under Article 226 of the Constitution of India with concurrent factual findings that oxygen was only a refining agent.

Analysis: The High Court was not sitting in appeal over the fact-finding authorities. The dispute turned on technical and factual matters examined by an expert committee after remand. Those findings were concurrently accepted below. In such a case, interference in writ jurisdiction was unwarranted because the record disclosed no basis for reappreciation of the technical evidence by the High Court.

Conclusion: The High Court erred in disturbing the concurrent findings of fact in exercise of writ jurisdiction.

Final Conclusion: The assessment order was restored and the appeals succeeded, with the revenue position upheld on the tax classification of the oxygen used in steel manufacture.

Ratio Decidendi: An input qualifies as raw material only if it is essential and indispensable to the manufacturing process itself, and a writ court should not overturn concurrent technical findings on such a question absent legal error or jurisdictional infirmity.

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