Class

Soak liquid

Concentration

Soak conditions
Temperature X time

Change rate of properties before and after soaking

Volume expansion rate

Change rate of tensile strength

A1

Hydrochloric acid(HCl)

18%

50℃×96h

≤+10%

≥-10%

A2

Sulfuric acid(H2SO4)

50%

50℃×96h

≤+10%

≥-10%

A3

Sodium hydroxide(NaOH)

48%

50℃×96h

≤+10%

≥-10%