On a whistlestop visit to Tata Steel the Prince commemorated the rebuilding of blast furnace number four - a major £185 million project.
He was then shown a video about the lightweight super-strength steel which could transform safety for British soldiers.
As Charles was taken around the marquee, children from Eastern Primary School performed a series of festive songs.
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Wales scrum-half Gareth Davies says the Scarlets mean business in Saturday's European Champions Cup semi-final against Leinster.
The MP has become Welsh Labour's first deputy leader after the result was announced at the Welsh Labour conference in Llandudno.
At Welsh Labour's conference Carwyn Jones is expected to make a speech containing pledges for his party and the wider public