GOST 5189-75

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  ГОСТ 5189-75

GOST 5189−75 Ribbon of Constantan. Technical specifications (Changes No. 1−4)

GOST 5189−75

Group B54

STATE STANDARD OF THE USSR

RIBBON OF CONSTANTAN

Specifications

Constantan strips. Specifications

GST 18 4730

Date of introduction 1976−01−01

Promulgated by Decree of the State Committee of standards of Ministerial Council of the USSR of July 18, 1975, N 1849

Limitation of actions taken by Protocol No. 5−94 of the Interstate Council for standardization, Metrology and certification (ICS 11−12−94)

REPLACE GOST 5189−49

REVISED (June 1998) with Amendments No. 1, 2, 3, 4, approved in February 1980, March 1985, August 1986, may 1990 (IUS 4−80, 6−85, 11−86, 8−90).

This standard applies to cold rolled strip of Constantan used in industry as a material of high electrical resistance designed for operation at temperatures above 500 °C.

1. ASSORTMENT

1.1. Thickness of cold rolled strips and limit deviations on thickness shall be as specified in table.1.

Table 1

Notes:

1. Theoretical weight of 1 mof the tape is calculated based on nominal thickness.

2. The density of Constantan adopted Rainey 8.9 g/cm.


(Changed edition, Rev. N 1).

1.2. The width of the strips and limit deviations on width shall be as specified in table.2.

Table 2

Note. Tape thickness from 0.10 to 0.18 mm incl. produce width from 10 to 170 mm, strip thickness of 0.20 mm or more are manufactured in the width from 10 to 300 mm.


(Changed edition, Rev. N 2).

1.3. Tape length should be:

not less than 20 m tape thickness from 0.10 to 0.60 mm;

at least 15 m for a tape thickness of from 0.65 to 1.00 mm;

at least 12 m for a tape thickness of 1.10 to 1.50 mm;

at least 10 m, for tape thickness of 1.60 to 2.00 mm.

1.4. (Deleted, Rev. N 2).

The legend is placed according to the scheme:

when the following abbreviations:

Examples of symbols

Tape normal accuracy in thickness and increased accuracy in width, soft, thickness 0.20 mm, 100 mm in width:

Tape DPCM 0,20х100 ND Mnmc40−1,5 GOST 5189−75

The same manufacturing high precision thickness and width, solid, thickness 1.50 mm, width 250 mm

Tape DPCT 1,50h250 ND Mnmc40−1,5 GOST 5189−75.

(Changed edition, Rev. N 2).

2. TECHNICAL REQUIREMENTS

2.1. Tape shall be manufactured in accordance with the requirements of this standard for technological regulations approved in the prescribed manner, of Constantan brand Mnmc40−1,5 with the chemical composition according to GOST 492−73.

(Changed edition, Rev. N 2).

2.2. Tapes are made of soft and hard.

2.3. The surface of the tape should be clean and smooth, without cracks, shells, delamination, bubbles, scratches, dents, holes and foreign inclusions.

On the surface of the tapes allowed the local minor scratches, dents, slivers, speckles and injections, if the control sweep they do not display the ribbon for the limit deviation on thickness. Allowed color tint, and light darkening of the surface of ribbons.

At customer’s request, color or tapes are not allowed. Allowed to control the surface quality of the ribbons of the samples, as agreed by consumer and manufacturer.

(Changed edition, Rev. N 4).

2.4. Edge strips should be trimmed evenly.

Edge tapes must not have cracks, delamination, significant burrs, waviness and dents.

2.5. The tape must have a temperature of +20 °C electrical resistivity (0,45−0,51)·10Ω·m.

2.6. The mechanical properties of tapes must meet the requirements specified in table.3.

Table 3

2.7. In the bending test soft tape must withstand bending 180° to the contact in any direction with respect to rolling, and the solid tape at 90° along the rolling.

2.2−2.7. (Changed edition, Rev. N 2).

3. ACCEPTANCE RULES

3.1. Tape take parties. The party should consist of strips of the same size, one state, one precision manufacturing shall be furnished in one document about quality that contains:

trademark or the name and trademark of manufacturer;

designation strips;

the weight of the party;

batch number;

the results of the tests.

The mass of the party must be not more than 500 kg.

(Changed edition, Rev. N 2).

3.2. To control the appearance and dimensions of the tapes from the party rolls selected «blindly» (by the greatest objectivity) according to GOST 18321−73. The control plans sootvetstvuyut 18242−72.

(Changed edition, Rev. N 4).

3.2. The number selected to control the thickness of the coils of strips is determined by the table.4.

Table 4

The number of monitored points in each selected coil is determined depending on the length of the tape roll at the table.5.

Table 5

Selected roll of tape is considered valid if the number of measurement results that do not meet the requirements of table.1, less than the acceptance number given in table.5.

If unsatisfactory results of measuring at least one of the monitored coils batch is rejected.

Allowed the manufacturer to carry out thickness control in the production process.

3.2 b. For controlling width and appearance of the tapes from the party selected coils in accordance with table.6.

Table 6

The party is considered usable if the number of coils not satisfying the requirements of table.2, PP.2.3, 2.4, less than the acceptance number given in table.6.

3.2 V. allowed the manufacturer upon receipt of unsatisfactory results of control of thickness, width and appearance of the tapes to control each coil of the party.

3.2 a-3.2 B. (Introduced later, Rev. N 4).

3.3. For tensile tests, determination of electrical resistivity, chemical composition, bending test, from the party taken by two rolls.

Tape with a thickness of 0.30 mm or less, the tensile test is not exposed.

(Changed edition, Rev. N 2).

3.4. If unsatisfactory test results of at least one of the indicators (except for thickness, width and appearance) it is carried out a re-test of the doubled sample taken from the same batch.

The results of repeated tests apply to the entire party.

(Changed edition, Rev. N 2, 4).

4. TEST METHODS

4.1 a. For testing tensile and bending tests, determine the electrical resistivity and the chemical composition of each selected coil cut on the same model.

(Added, Rev. N 2).

4.1. Sampling for tensile tests carried out according to GOST 24047−80.

Tensile test on strips of thickness less than 0.5 mm is carried out on samples of type I or II with a =12.5 mm, and according to GOST 11701−84. Tensile test strips of thickness 0.5 mm and more is carried out according to GOST 11701−84 the samples of a type I or II with =20 mm .

(Changed edition, Rev. N 2, 3).

4.2. The bend test is carried out according to GOST 14019−80.

The bend test rigid tape with a thickness of 1 mm and more is carried out around a mandrel of radius equal to the thickness of the tape.

4.3. Determination of the specific electrical resistance is carried out according to GOST 7229−76методом double bridge with an accuracy of 1% of the values determined. For this test special samples cut out of a width not exceeding 100 mm and a length of not less than 500 mm.

4.2−4.3. (Changed edition, Rev. N 2).

4.4. Control the appearance and size of the strips is carried out with a given probability 96% (acceptance level of defects AQL 4%).

(Changed edition, Rev. N 4).

4.4. The appearance of ribbons checked by inspection without the use of magnifying devices.

(Added, Rev. N 4).

4.5. The thickness of the tape is measured with a micrometer according to GOST 6507−90 lever or micrometer according to GOST 4381−87.

The measurement of the thickness of the tape is carried out at a minimum distance of 100 mm from the end and not less than 10 mm from the edge. For tapes with a width of 20 mm or less, the measurement is performed in the middle.

The thickness of the strip measured at each selected coil to points positioned uniformly randomly along the length of the roll.

The tape length (mm), calculated by the formula

,

where and  — respectively the outer and inner diameters of the coil, measured with a ruler according to GOST 427−75, mm;

 — tape thickness, mm.

The results of measuring the thickness of the tape does not meet the requirements given in table.1, should not differ from the permissible by more than half of the maximum deviations.

Allowed the manufacturer to control the thickness of the tape in the production process, other measurement tools, providing the necessary accuracy.

The tape width is measured by caliper according to GOST 166−89.

Allowed to control the width of the other measurement tools ensuring required accuracy.

The measurement is carried out in a single place at a minimum distance of 100 mm from the end of the tape.

(Changed edition, Rev. N 4).

4.6. Selection and preparation of samples for the determination of chemical composition is carried out according to GOST 24231−80.

The alloy’s chemical composition is determined by GOST 6689.1−92 — GOST 6689.22−92.

On the manufacturer is allowed to take samples from molten metal of each heat.

(Changed edition, Rev. N 1, 2).

4.7. Waviness of the edges of the tape test by bending it around a mandrel with a diameter of 100−120 mm. If the ripple does not disappear, the roll of tape is rejected.

(Added, Rev. N 4).

5. PACKING, MARKING, TRANSPORTATION AND STORAGE

5.1. Tape must be rolled into rolls. Tape with a thickness less than 0.20 mm shall be wound on wooden plugs or metal sleeves with a diameter of 34−36, 50−52 or 68−70 mm. sleeve Length should be equal to the nominal width of the tape. Tolerances length of the bushing ±1 mm.

Each roll shall be wrapped with metal tape not less than 0,2x10 mm according to GOST 3560−73 or wire with diameter not less than 0.5 mm according to GOST 3282−74 in 2−3 turns.

(Changed edition, Rev. N 4).

5.2. On the outer end of each roll shall be pasted or affixed label stating:

the trademark or name and trademark of manufacturer;

the legend of strips;

batch number;

stamp of technical control.

5.3. Tape should be wrapped in paper GOST 8828−89 and Packed in tight wooden boxes of type I, II or III according to GOST 2991−85 with the laying of wood chips or other material that protects the tape from damages.

Weight of cargo must not exceed 80 kg.

It is allowed to transport the tape in universal containers according to GOST 20435−75 or in specialized containers according to normative-technical documentation without packaging in boxes.

5.4. In each box or container must be attached to packing list with indication of the data is given in section 5.2, and the weight of the party.

5.5. Packaging of products sent to the far North and remote areas — according to GOST 15846−79, the group «Metals and metal products."

5.6. Consolidation packages in overpacks carried out according to GOST 24597−81. Framing is carried out on pallets according to GOST 9557−87 or without pallets with the use of wooden bars with dimensions not less than 50x50 mm.

The weight of packages should not exceed 1250 kg.

Transport packages must be wrapped in longitudinal and transverse directions with wire of diameter not less than 2 mm according to GOST 3282−74 with a twist of not less than five coils or tape not less than 0,3х30 mm according to GOST 3560−73, the bonding ends of the castle.

(Changed edition, Rev. N 4).

5.7. Transport marking — according to GOST 14192−96 with application of manipulation sign «Protect from moisture».

5.8. Tape is transported by all kinds of transport in covered vehicles in accordance with cargo carriage regulations applicable to transport of this species.

5.9. Tape should be stored in covered premises, without mechanical damage, contact with moisture and active chemical substances. Under specified storage conditions consumer properties of tapes in storage are not changed.

(Changed edition, Rev. N 2, 4).

APP. (Deleted, Rev. N 2).