GOST 9519.1-77

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  ГОСТ 9519.1-77

GOST 9519.1−77 Babbit calcium. Method of spectral analysis on cast metal standard samples (with Amendments No. 1, 2)

GOST 9519.1−77

Group B59

INTERSTATE STANDARD

CALCIUM BABBITS

Method of spectral analysis on cast metal standard samples

Lead-calcium bearing alloys. Method of spectral analysis on cast metalic standart specimens

AXTU 1709

Date of introduction 1978−01−01

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of nonferrous metallurgy of the USSR

DEVELOPERS

B. C. Chumachenko, L. I. Punin, V. I. Petrov, A. I. Pogonina, S. D. Demchenko, R. P. Petrova

2. APPROVED AND promulgated by the DECREE of the State Committee of standards of Ministerial Council of the USSR from 15.04.77 N 946

3. REPLACE GOST 9519−60

4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

5. Limitation of actions taken by Protocol No. 3−93 Interstate Council for standardization, Metrology and certification (ICS 5−6-93)

6. EDITION (July 2000) with Amendments No. 1, 2, approved in October 1982, June 1987 (ICS 1−83, 10−87)


This standard specifies the method of spectral analysis of calcium babbits standard for molten metal samples.

The method is based on measuring the relative intensities of spectral lines of the sample at the excitation of spectra by high voltage spark discharges.

Method sets the determination of impurities and main components of calcium babbits in the range of mass fraction of, %:

calcium is from 0.2 to 1.5;

sodium from 0.2 to 1.2;

tin is from 0.05 to 3.5;

magnesium is from 0.01 to 0.15;

of bismuth from 0.01 to 0.20;

of antimony from 0.05 to 0.5;

of copper, from 0.01 to 0.3;

aluminum is from 0.05 to 0.5.

(Changed edition, Rev. N 1, 2).

1A. GENERAL REQUIREMENTS

1A. General requirements for method of analysis and safety requirements according to GOST 9519.0.

Sec. 1A. (Added, Rev. N 1).

1. APPARATUS, MATERIALS AND REAGENTS

Quartz spectrograph medium dispersion.

Generator high-voltage spark.

Microphotometer.

Spectromancer.

Table lathe.

A pair of tweezers.

Photographic plates of the spectral type I according to GOST 10691.0.

The N developer 1 and fixer.

Standard samples of the enterprise of brands BKA, BK2 and BK2SH.

Sec. 2. (Deleted, Rev. N 1).

2A. Preparation for assay

2A.1. Preparation of the material of a standard sample of the enterprise and its certification are conducted in accordance with the application.

Sec. 2A. (Added, Rev. N 2).

3. ANALYSIS

3.1. The conditions of analysis are given in table.1.

Table 1

3.1. Samples for spectral analysis with a diameter of 6 mm and a length of 60−100 mm sharpen on the hemisphere.

(Added, Rev. N 1).

3.2. Spectra of standard samples of the enterprise and the investigated samples are photographed on one disc 2−3 times, randomizer order take consecutive photographs of the spectra of standard samples of the enterprise and samples.

(Changed edition, Rev. N 1).

3.3. A photographic plate placed in the cassette so as to cover the investigated range of the spectrum.

3.4. The exposure time is adjusted depending on the sensitivity of photographic plates.

3.5. Processing of photographic plates produced according to GOST 10691.0.

3.6. The wavelengths of the analytical lines and lines of comparison are given in table.1A.

Table 1A

Note. When a sample of zinc superimposed line zinc 330,2 nm line of sodium 330,2 nm. The lack of zinc in the samples control in the more sensitive line zinc 334,5 nm. The appearance of the line zinc sodium determine the chemical or atomic absorption method.

3.7. The optical densities of the analytical lines () and compare () are measured by microphotometer.

3.8. On the measured values the calculated difference of the optical densities of the analytical lines and comparison lines , averaging these values along three parallel spectrograms, getting .

Calibration curve constructed in the coordinates for each of the photographic plates on which the photographed spectra of the analyzed samples and standard samples of the enterprise.

3.9. The position control calibration curve is carried out periodically.

The offset of the calibration curve is considered valid when the condition:

,

where the result of the analysis, %;

 — mass fraction, given in the certificate of standard sample, %;

 — the allowable difference shown in table.3, %;

the value of the certified characteristics, %.

3.6−3.9. (Added, Rev. N 2).

4. PROCESSING OF THE RESULTS

4.1−4.3. (Deleted, Rev. N 2).

4.4. For the results analysis be the arithmetic mean of results of three parallel measurements. The allowable divergence between the most differing data at a confidence level of 0.95 does not exceed the values given in table.3.

The numerical values of the results of the analysis should end with the figure of the same kind, and corresponding standard indicators of the chemical composition specified in the standards for grades.

Table 3*

________________
* Table 2. (Deleted, Rev. N 2).

(Changed edition, Rev. N 2).

4.5. The reproducibility of the analysis of the same samples (and ), made at different times in different laboratories according to this method, must satisfy the condition:

,

where  — the allowable difference shown in table.3, %.

4.6. In case of contact with the result of the analysis of the critical region of the tolerance field on the element content in the alloy of a given brand (normalized border vintage composition according to GOST 1209), the sample is analyzed by chemical methods 1219.1 according to GOST-GOST 1219.8.

4.5, 4.6. (Added, Rev. N 2).

APP (mandatory). Preparation of the material of a standard sample of the enterprise and its certification

APP
Mandatory

Preparation of the material of a standard sample of enterprise in accordance with GOST and GOST 9519.0 9519.2.

In the manufacture of a standard sample of the enterprise cast the rods with increased diameter (for example, if the analysis uses rods with a diameter of 8 mm, then cast them with a diameter of 10 mm) and filled with grease. Before analysis the rods face piercing holes to the desired diameter (8 mm).

Standard samples of the enterprise must be certified in accordance with GOST 8.315.

The permissible limit of error setting values of CRM certified characteristics () of a standard sample of the enterprise is calculated by the formula

,

where  — the allowable difference specified in the 9519.1 GOST-GOST 9519.3, %;

the value of the certified characteristics, %.

The shelf life of standard samples of the enterprise depending on the storage conditions set for certification: for monolithic standard samples of the enterprise — ranging from 1 year to 5 years for synthetic — 2 years.

APP. (Added, Rev. N 2).