Transalloys (Pty) Ltd v Mineral-Loy (Pty) Ltd

Mineral-Loy (Pty) Ltd instituted action against Highveld Steel and Vanadium Corporation Ltd and Transalloys (Pty) Ltd for payment of commission and damages arising from an alleged distribution and service agreement originally concluded in 1985 and amended in 1994. The agreement was allegedly assigned to Transalloys. Issues relating to the existence, terms and repudiation of the agreement were separated and determined in Mineral-Loy’s favour by Bertelsmann J in June 2013. Thereafter Mineral-Loy amended its particulars of claim to increase damages and introduce new claims, including a substantial claim arising from sales to Afro Mineral Trading AG (AMT). Transalloys amended its plea to raise new defences based on an alleged variation of the agreement in December 2006 and waiver by Mineral-Loy. Mineral-Loy replicated that these defences were barred by res judicata/issue estoppel. The High Court upheld the replication, and Transalloys appealed to the Supreme Court of Appeal.

The appeal was partially successful only to the extent of correcting the High Court order. The High Court order was set aside and replaced with an order upholding the replication of res judicata and striking out paragraphs 9.2 to 9.4, 17.2 and 22.2.1 of the amended plea. The appeal was otherwise dismissed with costs, including the costs of two counsel.

The case provides authoritative guidance on the application of res judicata and issue estoppel in South African civil procedure, particularly in the context of amended pleadings and separated issues. It reinforces the once-and-for-all rule and emphasises that parties must raise all available defences when issues are first adjudicated. The judgment also serves as a caution against ill-considered separation of issues under Rule 33(4), highlighting the risk of procedural inefficiency and confusion.