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GOST 26876-86

GOST R ISO 15353-2014 GOST P 55080-2012 GOST R ISO 16962-2012 GOST R ISO 10153-2011 GOST R ISO 10280-2010 GOST R ISO 4940-2010 GOST R ISO 4943-2010 GOST R ISO 14284-2009 GOST R ISO 9686-2009 GOST R ISO 13899-2-2009 GOST 18895-97 GOST 12361-2002 GOST 12359-99 GOST 12358-2002 GOST 12351-2003 GOST 12345-2001 GOST 12344-88 GOST 12350-78 GOST 12354-81 GOST 12346-78 GOST 12353-78 GOST 12348-78 GOST 12363-79 GOST 12360-82 GOST 17051-82 GOST 12349-83 GOST 12357-84 GOST 12365-84 GOST 12364-84 STATE STANDARD P 51576-2000 GOST 29117-91 GOST 12347-77 GOST 12355-78 GOST 12362-79 GOST 12352-81 GOST P 50424-92 STATE STANDARD P 51056-97 GOST P 51927-2002 GOST P 51928-2002 GOST 12356-81 GOST R ISO 13898-1-2006 GOST R ISO 13898-3-2007 GOST R ISO 13898-4-2007 GOST R ISO 13898-2-2006 STATE STANDARD P 52521-2006 GOST P 52519-2006 GOST R 52520-2006 GOST P 52518-2006 GOST 1429.14-2004 GOST 24903-81 GOST 22662-77 GOST 6012-2011 GOST 25283-93 GOST 18318-94 GOST 29006-91 GOST 16412.4-91 GOST 16412.7-91 GOST 25280-90 GOST 2171-90 GOST 23401-90 GOST 30642-99 GOST 25698-98 GOST 30550-98 GOST 18898-89 GOST 26849-86 GOST 26876-86 GOST 26239.5-84 GOST 26239.7-84 GOST 26239.3-84 GOST 25599.4-83 GOST 12226-80 GOST 23402-78 GOST 1429.9-77 GOST 1429.3-77 GOST 1429.5-77 GOST 19014.3-73 GOST 19014.1-73 GOST 17235-71 GOST 16412.5-91 GOST 29012-91 GOST 26528-98 GOST 18897-98 GOST 26529-85 GOST 26614-85 GOST 26239.2-84 GOST 26239.0-84 GOST 26239.8-84 GOST 25947-83 GOST 25599.3-83 GOST 22864-83 GOST 25599.1-83 GOST 25849-83 GOST 25281-82 GOST 22397-77 GOST 1429.11-77 GOST 1429.1-77 GOST 1429.13-77 GOST 1429.7-77 GOST 1429.0-77 GOST 20018-74 GOST 18317-94 STATE STANDARD P 52950-2008 GOST P 52951-2008 GOST 32597-2013 GOST P 56307-2014 GOST 33731-2016 GOST 3845-2017 STATE STANDARD P ISO 17640-2016 GOST 33368-2015 GOST 10692-2015 GOST P 55934-2013 GOST P 55435-2013 STATE STANDARD P 54907-2012 GOST 3845-75 GOST 11706-78 GOST 12501-67 GOST 8695-75 GOST 17410-78 GOST 19040-81 GOST 27450-87 GOST 28800-90 GOST 3728-78 GOST 30432-96 GOST 8694-75 GOST R ISO 10543-99 GOST R ISO 10124-99 GOST R ISO 10332-99 GOST 10692-80 GOST R ISO 17637-2014 GOST P 56143-2014 GOST R ISO 16918-1-2013 GOST R ISO 14250-2013 GOST P 55724-2013 GOST R ISO 22826-2012 GOST P 55143-2012 GOST P 55142-2012 GOST R ISO 17642-2-2012 GOST R ISO 17641-2-2012 GOST P 54566-2011 GOST 26877-2008 GOST R ISO 17641-1-2011 GOST R ISO 9016-2011 GOST R ISO 17642-1-2011 STATE STANDARD P 54790-2011 GOST P 54569-2011 GOST P 54570-2011 STATE STANDARD P 54153-2010 GOST R ISO 5178-2010 GOST R ISO 15792-2-2010 GOST R ISO 15792-3-2010 GOST P 53845-2010 GOST R ISO 4967-2009 GOST 6032-89 GOST 6032-2003 GOST 7566-94 GOST 27809-95 GOST 22974.9-96 GOST 22974.8-96 GOST 22974.7-96 GOST 22974.6-96 GOST 22974.5-96 GOST 22974.4-96 GOST 22974.3-96 GOST 22974.2-96 GOST 22974.1-96 GOST 22974.13-96 GOST 22974.12-96 GOST 22974.11-96 GOST 22974.10-96 GOST 22974.0-96 GOST 21639.9-93 GOST 21639.8-93 GOST 21639.7-93 GOST 21639.6-93 GOST 21639.5-93 GOST 21639.4-93 GOST 21639.3-93 GOST 21639.2-93 GOST 21639.0-93 GOST 12502-67 GOST 11878-66 GOST 1763-68 GOST 13585-68 GOST 16971-71 GOST 21639.10-76 GOST 2604.1-77 GOST 11930.7-79 GOST 23870-79 GOST 11930.12-79 GOST 24167-80 GOST 25536-82 GOST 22536.2-87 GOST 22536.11-87 GOST 22536.6-88 GOST 22536.10-88 GOST 17745-90 GOST 26877-91 GOST 8233-56 GOST 1778-70 GOST 10243-75 GOST 20487-75 GOST 12503-75 GOST 21548-76 GOST 21639.11-76 GOST 2604.8-77 GOST 23055-78 GOST 23046-78 GOST 11930.11-79 GOST 11930.1-79 GOST 11930.10-79 GOST 24715-81 GOST 5639-82 GOST 25225-82 GOST 2604.11-85 GOST 2604.4-87 GOST 22536.5-87 GOST 22536.7-88 GOST 6130-71 GOST 23240-78 GOST 3242-79 GOST 11930.3-79 GOST 11930.5-79 GOST 11930.9-79 GOST 11930.2-79 GOST 11930.0-79 GOST 23904-79 GOST 11930.6-79 GOST 7565-81 GOST 7122-81 GOST 2604.3-83 GOST 2604.5-84 GOST 26389-84 GOST 2604.7-84 GOST 28830-90 GOST 21639.1-90 GOST 5640-68 GOST 5657-69 GOST 20485-75 GOST 21549-76 GOST 21547-76 GOST 2604.6-77 GOST 22838-77 GOST 2604.10-77 GOST 11930.4-79 GOST 11930.8-79 GOST 2604.9-83 GOST 26388-84 GOST 14782-86 GOST 2604.2-86 GOST 21639.12-87 GOST 22536.8-87 GOST 22536.0-87 GOST 22536.3-88 GOST 22536.12-88 GOST 22536.9-88 GOST 22536.14-88 GOST 22536.4-88 GOST 22974.14-90 GOST 23338-91 GOST 2604.13-82 GOST 2604.14-82 GOST 22536.1-88 GOST 28277-89 GOST 16773-2003 GOST 7512-82 GOST 6996-66 GOST 12635-67 GOST 12637-67 GOST 12636-67 GOST 24648-90

GOST 26876−86 (ST SEV 5016−85) sintered hard Alloys. General requirements for methods of chemical analysis


GOST 26876−86
(ST CMEA 5016−85)

Group B59


STATE STANDARD OF THE USSR

SINTERED HARD ALLOYS

General requirements for methods of chemical analysis

Cemented carbides. General requirements for methods of chemical analysis


AXTU 1709

Valid from 01.01.87
to 01.01.97*
_______________________________
* Expiration removed
Protocol N 7−95 Interstate Council
for standardization, Metrology and certification
(IUS N 11, 1995). — Note the manufacturer’s database.



DEVELOPED by the Ministry of nonferrous metallurgy of the USSR

PERFORMERS

N.Kudrya, S. N. Suvorov, S. V. Romanov, A. A. Zaluzhny

INTRODUCED by the Ministry of nonferrous metallurgy of the USSR

Member Of The Board Of A. P. Snurnikov

APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from 22.04.86 N 1030

1. This standard establishes General requirements for methods of chemical analysis of solid sintered alloy, carbide carbide mixtures and complex carbides.

The standard fully complies ST SEV 5016−85.

2. The selection and preparation of samples is carried out according to GOST 20559−75.

A sample of the sintered hard alloy has to be ground into powder and sifted through a sieve with a nominal mesh size of not more than 0,160 mm according to ST SEV 2644−80.

If the sample contains a plasticizer, it should be removed.

3. Laboratory volumetric glassware should meet the requirements of GOST 1770−74.

4. All reagents used should have a purity not lower than «pure for analysis» (h. e. a.), if not provided the other requirements in the standards on methods of determination of elements.

5. For the preparation of aqueous solutions and the analysis used distilled water according to GOST 6709−72 or deionized water, if no other requirements in the standards on methods of determination of elements.

6. In the expression «diluted 1:1, 1:2», etc. the first digits denote the volume part of the diluted reagent, the second volume of the used solvent.

7. The concentration of solutions Express:

the relative density (ГОСТ 26876-86 (СТ СЭВ 5016-85) Сплавы твердые спеченные. Общие требования к методам химического анализа);

the mass of the substance in grams per unit volume of solution (mass concentration, g/cmГОСТ 26876-86 (СТ СЭВ 5016-85) Сплавы твердые спеченные. Общие требования к методам химического анализа);

mass of substance in grams referred to 100 g of solution (mass fraction, expressed in percent);

the volume of material in cubic centimeters, is related to 100 cmГОСТ 26876-86 (СТ СЭВ 5016-85) Сплавы твердые спеченные. Общие требования к методам химического анализаof solution (volume ratio, expressed in percent);

the amount of substance in moles, contained in unit volume of solution (molar concentration, mol/DMГОСТ 26876-86 (СТ СЭВ 5016-85) Сплавы твердые спеченные. Общие требования к методам химического анализа).

8. For the preparation of standard solutions used, the metals content of the base element not less than 99.9%, unless otherwise prescribed in the standards methods for the determination of the elements.

9. Weighing the sample sample precipitation and substances for the preparation of standard solutions is carried out on an analytical balance with an accuracy of 0.0002 g. no more than the Required accuracy of weighing and measuring the volume change in the standards on methods of determination of elements by specifying the number of decimal places.

10. Terms related to the degree of heating of water (solution) and the duration of any operation — according to ST SEV 804−77.

11. The titer of the solutions must be installed not less than three batches of the starting material. The titer is expressed in grams of ingredient per 1 cmГОСТ 26876-86 (СТ СЭВ 5016-85) Сплавы твердые спеченные. Общие требования к методам химического анализаof the solution, count up to the sixth decimal place and rounded to the fourth significant digit.

12. The contents of elements determined in three parallel batches.

Discrepancies in the results of parallel definitions should not exceed the permissible differences given in the relevant standards on methods of determination of elements at confidence probability ГОСТ 26876-86 (СТ СЭВ 5016-85) Сплавы твердые спеченные. Общие требования к методам химического анализаof 0.95.

If discrepancies in the results exceed the permitted, the analysis is repeated.

13. Simultaneously with the analysis under the same conditions is carried out at least three control experiments for inclusion in the definition of the amendments, taking into account the content of the element in the reactants. The arithmetic average of the results of the control experiments is subtracted from the values obtained when determining the content of the element in the sample.

14. The result of the analysis taking arithmetic mean value of results of parallel measurements. Rounding numeric values is carried out according to ST SEV 543−77.

15. When photometric definitions used cuvettes with a thickness of the light absorbing layer, in which the measurements were carried out at the optimum optical density.

16. The calibration graph should be constructed in the system of rectangular coordinates: the x-axis to delay the numeric value of the concentration or mass of the element in the specified amount, and the ordinate is the measured value, or a function of it.

To build a calibration curve requires at least three calibration points, each point should be based on the average results of three parallel measurements.

The calibration points should be evenly distributed across the measuring range. The first and last points must correspond to the limits of the measuring range, or cover the range of measurements.

Preparation of solutions for constructing the calibration curve performed prior to analysis. You can define and apply the calibration function.

17. In determining the method of atomic absorption set wavelength, the composition of the gas flame, a reducing or oxidizing action of the flame, other conditions of the measurement such that an optimum sensitivity and accuracy for the corresponding element, and applied device.

18. Control of the correctness of the results of determination of total and free carbon is carried out using standard samples (GEO, CCA, or SOP). The results of the analysis are correct if the difference between received the contents of the controlled component and its validated contents in the standard sample does not exceed ГОСТ 26876-86 (СТ СЭВ 5016-85) Сплавы твердые спеченные. Общие требования к методам химического анализаthe permissible differences at the level of the certified values.

19. Control of the correctness of the results of determination of cobalt is carried out by the method of additives, which carry out finding the content of the analyte in the test material after adding an appropriate sample of pure metal or aliquote part of a standard solution of this component to the sample of analyte prior to analysis.

20. Control of the correctness of the results of the determination of titanium is carried out by varying batches, which carry out finding the contents defined components in different batches of the same analyte.

21. The amount of additive (amount of a standard solution) is chosen so that the analytical signal of the designated component increased 1.5−2 times compared with the analytical signal of this component in the absence of additives in the previous linkage. We should also maintain the optimal conditions of analysis provided by a particular standard on method of analysis.

22. The results of the analysis are correct if the value found differs from that given additive content of more than 0.5ГОСТ 26876-86 (СТ СЭВ 5016-85) Сплавы твердые спеченные. Общие требования к методам химического анализа, where ГОСТ 26876-86 (СТ СЭВ 5016-85) Сплавы твердые спеченные. Общие требования к методам химического анализаand ГОСТ 26876-86 (СТ СЭВ 5016-85) Сплавы твердые спеченные. Общие требования к методам химического анализа — the permissible discrepancy of the results of parallel measurements of the component in the sample and in the sample with the additive, the previous and subsequent batches.