Joke Collection Website - Bulletin headlines - What's the difference between H-HS-TA and H-STA imported from Japan?

What's the difference between H-HS-TA and H-STA imported from Japan?

The first letter is high carbon, meaning high carbon steel. TA undergoes triple annealing, and STA undergoes solution treatment and aging. HS dare not confirm, guessing whether it is high strength or high strength.