BHP has been accused of using strikebreaking tactics similar to US tech behemoth Amazon by hiring alternative workers to avoid a major planned strike.
Up to 450 workers at the mining giant's Port Hedland facility could go on strike as early as next week after union members overwhelmingly voted in support of the move.
One union head said he was disappointed to see BHP acting the way it is towards its workers, given how well Australia had treated it, and how much profit it had extracted from the nation.
"The company so far has been stonewalling us and (is) starting to engage in American Amazon-style tactics by bringing in strikebreakers," Electrical Trades Union WA secretary Adam Woodage told media on Friday.