Item
|
Tensile strength/Mpa ≥
|
Breaking elongation/% ≥
|
Abrasion loss/mm3 ≤
|
Hardness/(°)+10/-5
|
Before aging
|
14.0
|
400
|
250
|
60
|
After aging
|
12.0
|
340
|
-
|
65
|
Class
|
Soak liquid
|
Concentration
|
Soak conditions(℃×h)
|
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%
|