BHP Group (ASX:BHP) has priced senior, unsecured, guaranteed bonds worth $1.5 billion, according to a Wednesday filing with the Australian bourse.

The bonds due 2036, carrying a fixed coupon rate of 5% per annum, were priced at $500 million, while those maturing in 2055, carrying a fixed rate of 5.75% per annum, were priced at $1 billion, the filing said.

Both sets of bonds will be issued by unit BHP Billiton Finance and are guaranteed by the company, the filing added.

The proceeds are expected to be used for general corporate purposes, and the settlement of the bonds is expected on Sept. 5, the mining firm said.