Paper pulp from eucalyptus
๐
Article
๐
1912
๐
Elsevier Science
๐
English
โ 65 KB
## 97 scratch hardness, loss of weight in a I per cent. acid solution, the amount of carbide, and microscopically. It is concluded that hardened steel always tends to change into a-iron and free cementite. Although this change proceeds imperceptibly at ordinary temperatures, it takes only a few se