A father-of-three was discovered slumped in a 'hot running channel' at Tata's Port Talbot steelworks, an inquest has been told.
His colleagues immediately called for help, but Justin Day was pronounced dead at the scene on September 25.
The opening of the inquest in Swansea heard that the contractor had been working that day on the inside upper level of Bay 21.
Acting senior coroner of Swansea and Neath Port Talbot, Colin Phillips, said a post mortem carried out on the 44-year-old from Llansamlet, concluded that the provisional cause of death was pending further investigation.
He adjourned the inquest for six months, when he would conduct a review of the progress of the investigation.
The circumstances surrounding the death of Mr Day are being investigated by South Wales Police with support from the Health and Safety Executive.
Following his death, his family said he "loved his family so much, he was working hard to provide the best for his family".
A fundraising page for Mr Day, described by his family as a "doting dad", has raised almost £8,000 to support his family.