GOST 21438-95
GOST 21438−95 zinc antifriction Alloys in pigs. Specifications
GOST 21438−95
Group W51
INTERSTATE STANDARD
ZINC ANTIFRICTION ALLOYS IN PIGS
Specifications
Zinc antifriction alloys in pigs. Specifications
ISS 77.120.60
GST 17 2140
Date of introduction 1997−01−01
Preface
1 DEVELOPED by the Donetsk state Institute of non-ferrous metals (Danism), MTK 107
SUBMITTED to the State Committee of Ukraine for standardization, Metrology and certification
2 ADOPTED by the Interstate Council for standardization, Metrology and certification on April 26, 1995 (minutes N 7 MGS)
The adoption voted:
| The name of the state |
The name of the national authority for standardization |
| The Republic Of Armenia |
Armastajad |
| The Republic Of Belarus |
Gosstandart Of The Republic Of Belarus |
| The Republic Of Kazakhstan |
Gosstandart Of The Republic Of Kazakhstan |
| The Republic Of Moldova |
Moldovastandart |
| Russian Federation |
Gosstandart Of Russia |
| Turkmenistan |
Glavgosekspertiza «Turkmenstandartlary" |
| The Republic Of Uzbekistan |
Standards |
| Ukraine |
Gosstandart Of Ukraine |
3 Decree of the Russian Federation Committee on standardization, Metrology and certification dated June 19, 1996 N 406 interstate standard GOST 21438−95 introduced directly as state standard of the Russian Federation from January 1, 1997
4 REPLACE GOST 21438−75
5 REISSUE. June 2011
1 Scope
This standard applies to zinc antifriction alloys in ingots, intended for the production of castings manufactured for the needs of the economy and exports.
The requirements of paragraphs 3.2, 3.3, 4.3, 7.2 of this standard are recommended, other requirements are mandatory.
2 Normative references
The present standard features references to the following standards:
GOST 14192−96 Marking of cargo
GOST 23328−95 zinc Alloys. Methods of spectral analysis
GOST 24231−80 non-ferrous metals and alloys. General requirements to selection and preparation of samples for chemical analysis
GOST 25284.0−95 Alloy zinc. General requirements for methods of analysis
GOST 25284.1−95 Alloy zinc. Methods for determination of aluminium
GOST 25284.2−95 aluminum-based Alloys. Methods for determination of copper
GOST 25284.3−95 aluminum-based Alloys. Methods for determination of magnesium
GOST 25284.4−95 aluminum-based Alloys. Methods for determination of lead
GOST 25284.5−95 aluminum-based Alloys. Methods for determination of cadmium
GOST 25284.6−95 Alloy zinc. Methods of iron determination
GOST 25284.7−95 Alloy zinc. Methods for determination of tin
GOST 25284.8−95 Alloy zinc. Methods for determination of silicon
3 Stamps
3.1 Brand and chemical composition of zinc antifriction alloys shall conform to those given in table 1.
Table 1
| Grade | Mass fraction, % | ||||||||
| the main components |
impurity, not more than | ||||||||
| aluminum |
copper |
magnesium |
zinc |
lead |
iron |
tin |
cadmium |
silicon | |
| TSAM 9−1,5 |
9,0−11,0 |
1,0−2,0 |
0,03−0,06 |
Basis |
0,02 |
0,10 |
0,01 |
0,015 |
0,03 |
| TSAM 10−5 |
9,0−12,0 |
4,0−5,5 |
0,03−0,06 |
The same |
0,02 |
0,10 |
0,01 |
0,015 |
0,03 |
3.2 Mass fraction of lead, tin, cadmium and silicon is determined by the requirement of the user.
3.3 Permissible mass fraction of impurities may be changed by agreement between the manufacturer and the consumer without changing the mass fraction of the main components and stipulated by the delivery terms.
3.4 Example of symbols
The pig in Zamak 9−1,5: TSAM 9−1,5 h GOST 21438−95.
4 Technical requirements
4.1 Alloys manufactured in accordance with the requirements of this standard technological instruction, duly approved.
4.2 Alloys manufactures in the form of ingots with an intersecting mass of not more than 27 kg.
4.3 Surface pigs should not have bays, Nikitin, SAG, slag and other inclusions that are visible to the naked eye.
Allowed traces of Stripping or cutting defects.
4.4 On each pig must be marked with:
— trademark or a trademark and the name of the manufacturer;
— number of melt;
— color coded alloy.
4.5 Color coding is applied at the end of the pigs has a dye in the form of a strip:
for alloy grade TSAM 9−1,5 h — yellow;
for alloy grade TSAM 10−5 h — blue.
5 acceptance Rules
5.1 Pig show to the acceptance of the parties. The party should consist of ingots of one brand of alloy, of one or more heats shall be furnished in one document about quality that contains:
is the trademark or name and trademark of manufacturer;
— brand alloy;
— number of melt (melting);
— the results of chemical analysis melting (melting);
— the weight of the batch;
— the designation of this standard.
5.2 To check the chemical composition of each heat are taken from 10% of pigs, not less than three.
On the manufacturer allowed for sampling from liquid metal.
5.3 To check the quality of the surface taken at least 10% of pigs from melting.
5.4 If unsatisfactory test results of at least one of the indicators, it conducted a re-test of the doubled sample taken from the same heat.
The results of re-checking apply to all the melting.
6 test Methods
6.1 Verification of the surface quality of ingots is carried out visually.
6.2 Selection and preparation of samples for chemical analysis is carried out according to GOST 24231.
Weight of sample for analysis shall be not less than 150 g.
6.3 Chemical composition of alloys determined according to GOST 23328, GOST 25284.0-GOST 25284.8. Allowed to determine the chemical composition by other methods of equal accuracy standard.
If there is disagreement in the assessment of the chemical composition analysis is carried out according to GOST 23328, GOST 25284.0-GOST 25284.8.
7 Transportation and storage
7.1 Pig transporterowych formed into packets in accordance with the normative documentation.
Transport marking under GOST 14192.
7.2 Packages of pigs transported by all kinds of transport in covered vehicles or containers in accordance with cargo carriage regulations applicable to transport of this species.
7.3 Pig should be kept indoors.
