GOST 804-93. Magnesium is primary in pigs. Technical specifications
You are interested in GOST 804−93 «Primary magnesium in pigs. Technical specifications «from the supplier company AvecGlob? Here you will find interesting information on this topic.
Application area
This standard applies to magnesium primary in pigs, intended for the production of alloys, magnesium thermal processes, desulphurization of pig iron as a chemical reagent, as well as for other purposes. The standard specifies requirements for ingots of unalloyed magnesium with a purity of 99.80; 99.90; 99.95 for general use, as well as a purity of 99.98 for special applications.
Depending on the chemical composition, the following magnesium grades are set: Mg80, Mg90, Mg95 and Mg98, where the numbers determine the percentage of magnesium after the decimal point.
Technical requirements
The chemical composition of magnesium,% should correspond to the standards indicated in the table:
| Magnesium | OKP code | Magnesium *, at least,% | Mass fraction of impurities, no more than,% | |||||||||||
| Iron | Silicon | Nickel | Copper | Aluminum | Manganese | Zinc | Lead | Tin | The amount of specified impurities | Amount iron, nickel, copper |
Any other element | |||
| Mg80 | 17 1441 1008 08 | 99.80 | 0.050 | 0.050 | 0,0020 | 0.0200 | 0.050 | 0.050 | - | - | - | 0.20 | - | 0.050 |
| Mg90 | 17 1441 1007 05 | 99.90 | 0.040 | 0.009 | 0,0010 | 0,0040 | 0.020 | 0.030 | - | - | - | 0.10 | - | 0.010 |
| Mg95 | 17 1441 1006 06 | 99.95 | 0.003 | 0.004 | 0,0010 | 0,0030 | 0.010 | 0.010 | 0.010 | 0.005 | 0.005 | 0.05 | 0.005 | 0.010 |
| Mg98 | 17 1441 1004 01 | 99.98 | 0.002 | 0.003 | 0.0005 | 0.0005 | 0.004 | 0.002 | 0.005 | 0.005 | 0.005 | 0.02 | - | 0.002 |
The mass fraction of impurities should not be more than: chlorine — 0.005% for grades Mg80, Mg90, Mg95; Potassium — 0,004% for the brand Mg95; sodium — 0,004% for the brand Mg95. Magnesium grade Mg90 at the request of the consumer is manufactured with a mass fraction of titanium no more than 0.002%. As agreed by the manufacturer with the consumer, magnesium grade Mg95 is manufactured with a mass fraction of manganese not more than 0.004% with a mass fraction of sodium not exceeding 0.01% and the sum of the mass fractions of iron, nickel and copper not more than 0.007%. At the request of the consumer magnesium grade Mg95 is manufactured with nickel mass fractions not more than 0.0007% and aluminum not more than 0.006%. | ||||||||||||||
Supplier — AvekGlob Company — offers primary magnesium in a wide range of brands and at affordable prices from the manufacturer. The supplier guarantees the timely delivery of products to any address specified by the consumer.
Surface quality and quality
Magnesium is produced in the form of pigs with a mass (8.0 ± 1.0) kg, magnesium production in pigs weighing from (2.0 ± 0.3) kg to (22.0 ± 2.0) kg is allowed.
Chutes intended for long-term storage, and at the request of the consumer, are subjected to anticorrosion treatment with a solution of potassium dichromate. The surface is treated in a solution of soda ash, followed by washing in water.
The surface of pigs should be free of flux inclusions and products of magnesium combustion. Flux inclusions and combustion products with a total area of no more than 25 mm and a depth of not more than 1 mm are allowed on the surface of pigs that have not undergone anticorrosion treatment, upon agreement of the manufacturer with the consumer.
The cleaned places and the presence of tarnishing colors are allowed (see table):
| Possible defects on the surface | Definition |
| Flux connections | Saline inclusions of a rounded shape, filling the open void in the body of the pig. When lying down, it forms a loose outgrowth of gray or black color |
| Combustion products | Separate or group sinks filled with a powder of oxides from white to black color or outgrowths of gray or dark color |
| Stripped places | Traces of machining of pigs to remove surface defects |
| Tint colors | Coloring of surface areas, characterized by a gradual transition from one color and tonality with a metallic luster to the other |
Supplier — the company AvekGlob — offers to purchase a large range of magnesium primary in pigs, intended for general and special use. Products can be bought at a price formed on the basis of European and world standards of production. Implementation is possible in bulk and retail, for regular customers, a flexible system of discounts operates.