ASTM C 217/C217M : 2020
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Standard Test Method for Weather Resistance of Slate
Hardcopy , PDF
21-01-2022
English
16-07-2020
This test method covers two procedures for weather resistance of slate in all outdoor installations by determining the depth of softening by a shear/scratch tester or by hand scraping after soaking in 1 % sulfuric acid.
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