(in Russian – ГОСТ 7478-75 Графит элементный. Технические условия).

This standard applies to enriched crystalline natural graphite of the Zavalyevsky and Taiginsky deposits, intended for the production of primary chemical power sources.

Depending on the physical and chemical composition, graphite is subdivided into grades according to GOST 17022-81:

Graphite GE-1 (ГЭ-1)

Ash content, %, not more than = 10
The release of volatile substances, %, not more than = 1
Copper content (Cu), %, not more than = 0.05
The residue on the sieve No. 016, %, not more than = 40
Pass through the sieve No. 0063, %:
– not more than = 25
– not less than = –
Moisture content, %, not more than = 1

Graphite GE-2 (ГЭ-2)

Ash content, %, not more than = 14
The release of volatile substances, %, not more than = 1
Copper content (Cu), %, not more than = 0.05
The residue on the sieve No. 016, %, not more than = 40
Pass through the sieve No. 0063, %:
– not more than = 25
– not less than = –
Moisture content, %, not more than = 1

Graphite GE-3 (ГЭ-3)

Ash content, %, not more than = 10
The release of volatile substances, %, not more than = 1
Copper content (Cu), %, not more than = 0.05
The residue on the sieve No. 016, %, not more than = 10
Pass through the sieve No. 0063, %:
– not more than = –
– not less than = 45
Moisture content, %, not more than = 1

Graphite GE-4 (ГЭ-4)

Ash content, %, not more than = 14
The release of volatile substances, %, not more than = 1
Copper content (Cu), %, not more than = 0.05
The residue on the sieve No. 016, %, not more than = 10
Pass through the sieve No. 0063, %:
– not more than = –
– not less than = 45
Moisture content, %, not more than = 1

No impurities are allowed in graphite of all grades.