Bradken Consolidated Ltd v Broken Hill Proprietary Co Ltd

Bradken Consolidated Ltd (Bradken) and Broken Hill Proprietary Co Ltd (BHP) were parties to litigation before the High Court of Australia concerning a dispute over the interpretation of a contract. The core of the disagreement revolved around the pricing of certain steel products supplied by BHP to Bradken under a long-term agreement.

The High Court was required to determine whether the pricing provisions of the contract allowed BHP to adjust the price of steel based on fluctuations in the cost of raw materials, specifically iron ore and coal, beyond a certain threshold. The central legal issue was the proper construction of clause 7 of the Supply Agreement, which dealt with price escalation.

The Court's reasoning focused on the plain meaning of the contractual language and the surrounding circumstances at the time the agreement was made. Gibbs A.C.J., Stephen, Mason, Jacobs and Murphy JJ considered the express terms of clause 7, which stipulated that price adjustments were to be calculated by reference to specified indices. They found that the clause did not permit BHP to unilaterally introduce a new pricing mechanism based on its own internal costings of raw materials, particularly when those costs exceeded the indices. The Court applied principles of contractual interpretation, emphasizing that clear and unambiguous language is required to justify a departure from the agreed-upon pricing formula.

The High Court dismissed BHP's appeal, upholding the decision of the lower court. Bradken was therefore entitled to have the price of steel determined according to the contractual formula, without the additional cost adjustments sought by BHP.