GOST 22666-77

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  ГОСТ 22666-77

GOST 22666−77 copper Wire and Kopel alloy for low-temperature thermoelectric converters. Specifications (with Amendments No. 1, 2)

GOST 22666−77
Group В74

STATE STANDARD СОЮ3А SSR
COPPER WIRE AND KOPEL ALLOY
FOR LOW-TEMPERATURE THERMOELECTRIC CONVERTERS

Specifications
Copper wire and kopel alloy wire for low temperature
thermoelectrical transducers. Specifications

GST 18 4000

Validity period from 01.01.80
to 01.01.95*
________________
* Expiration removed by Protocol No. 4−93
The interstate Council for standardization,
Metrology and certification (I & C N 4, 1994).
— Note the CODE.

INFORMATION DATA

1. DEVELOPED AND INTRODUCED the all-Union Order of the red banner research Institute of Metrology named. D. I. Mendeleev (Sverdlovsk branch)

DEVELOPERS

V. G. Romanov, B. P. Pavlov (the head), L. I. Lijeska

2. APPROVED AND promulgated by the Decree of the State Committee of standards of Ministerial Council of the USSR from 24.08.77 N 2017

3. INTRODUCED FOR THE FIRST TIME

4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

The designation of the reference document referenced	The item number, app
GOST 8.157−75	Annex 5
GOST 492−73	2.1, Annex 5
GOST 859−78	2.1, Annex 5
GOST 982−80	Annex 4
GOST 2991−85	5.4
GOST 4381−87	4.2
GOST 5959−80	5.4
GOST 6689.1−92-GOST 6689.3−92	4.8
GOST 6689.7−92	4.8
GOST 6689.10−92	4.8
GOST 6689.12−92	4.8
GOST 6689.15−92-GOST 6689.20−92	4.8
GOST 6689.23−92	4.8
GOST 7229−76	4.7
GOST 8273−75	5.2
GOST 8828−89	5.4
GOST 9293−74	Annex 4
GOST 9717.1−82-GOST 9717.3−82	4.8
GOST 10354−82	5.2
GOST 10446−80	4.6
GOST 12162−77	Annex 4
GOST 13938.1−78 — GOST 13938.12−78	4.8
GOST 14192−77	5.5
GOST 15846−79	5.4
GOST 21140−88	5.4
GOST 22663−77	4.5
GOST 24047−80	4.6
GOST 24231−80	4.8

5. REISSUE with Amendments No. 1, 2 approved in June 1985, December 1988 (IUS 10−84, 3−89)


This standard applies to termoelektrodnye wire of copper and alloy beads, used as thermoelectrical thermoelectric thermometers designed to measure temperature ranging from minus 200 to plus 100 °C.

(Changed edition, Rev. N 1, 2).

1. ASSORTMENT

1.1. The diameter of the wire and limit deviation shall be as specified in table.1.

Table 1

mm

Wire diameter	Limit deviations
0,2	-0,03
0,3	-0,04
0,4	-0,05
0,5	-0,05

1.2. The roundness of the wire must not exceed the limit deviation for diameter.

The legend is placed according to the scheme:

when the following abbreviations:
method of manufacture:	cold	— D;
sectional shape:	round	— CU;
condition:	soft	— M;
length (form of production):	on the coils	— CT.

Instead of the missing data is «X».

Examples of symbols

Wire diameter of 0.2 mm copper grade M1E:

Wire DKRM 0.2 CT M1E GOST 22666−77.

The same alloy Copel brand Mnmc43−0,5:

Wire DKRM Mnmc43 0.2 CT-0.5 GOST 22666−77.

(Changed edition, Rev. N 1).

2. TECHNICAL REQUIREMENTS

2.1. Wire produced in accordance with the requirements of this standard for technological regulations approved in the prescribed manner, of copper grades no lower M1E with the chemical composition according to GOST 859−78 and alloy Copel brand Mnmc43−0,5 chemical composition according to GOST 492−73.

(Changed edition, Rev. N 1).

2.2. Thermoelectric power (T. E. D. S.), developed kopeleva wire paired with copper in the temperature range from minus 200 to plus 100 °C, shall conform to the values given in GOST 3044−84 and meet the following standards:

at minus 196 °C — minus 6,083 ±0,060 mV;

at minus 78 °C — minus 2,997±0,060 mV;

at plus 100 °C plus 4,721 ±0,060 MB.

For thermocouples high accuracy the maximum deviations of T. E. D. S. must meet:

at minus 196 °C — ±0.027 mV;

at minus 78 °C — ±0,046 MB.

(Changed edition, Rev. N 1, 2).

2.3. The scope of T. E. D. S. heterogeneity in any of the material segments with a length of 100 m at the boiling point of liquid nitrogen must not exceed:

for kobelevo wire — 15 mV;

for copper wire — 5 mV;

including on the section of wire of length 2 m:

for kobelevo wire — 9 mV;

for copper wire — 3 µv.

2.4. The surface of wire should be clean, smooth, captured, cracks, delamination, burrs, sunsets, nicks, scratches, scratches. Allowed individual surface defects, not bringing the wire for the limit deviation for diameter at reference sweep.

2.5. Wire produced in the annealed (soft) condition with light surface. On the surface of kobelevo wire allowed the color of the tint.

(Changed edition, Rev. N 1).

2.6. Wire on reel should consist of a single segment with no splices, knots.

2.7. Weight of wire on the coil is given in Annex 6.

Theoretical weight of 1000 m of wire is given in Annex 2.

(Changed edition, Rev. N 2).

2.8. Mechanical properties of the wire at a temperature of (20±5) °C shall be as specified in table.3.

Table 3*

__________________
* Table 2 was deleted, Rev. N 2.

Material name	Wire diameter, mm	Temporary resistance , MPa (kgf/mm), not less	Elongation after rupture , %, not less
0,2	15
0,3	15
Kopel	0,4	390 (40)	15
0,5	20
0,2	20
0,3	20
Copper	0,4	200 (20)	20
0,5	20

Note. The mechanical properties of kobelevo and copper wire at low temperatures is given in Appendix 3.


(Changed edition, Rev. N 1, 2).

2.9. Electrical resistivity of the wire at a temperature of (20±5) °C shall conform to:

wire alloy Copel — (0,47±0,05)·10Ω·m;

wire made of copper GOST 859−78.

(Changed edition, Rev. N 1).

3. ACCEPTANCE RULES

3.1. Wire take parties. The party should consist of an alloy wire Copel and copper of the same diameter and be accompanied by a document about quality that contains:

trademark or the name and trademark of manufacturer;

symbol wire;

test results (mechanical properties, determination of resistivity, T. E. D. S., magnitude of T. E. D. S. heterogeneity);

batch number;

numbers of coils;

the number of coils or packages in the shipment;

the net weight and gross.

The permissible difference of the masses kopeleva and copper wire in the party must not exceed 3%.

(Changed edition, Rev. N 1).

3.1. To determine the chemical composition of the selected two coils from the party.

On the manufacturer is allowed to inspect the chemical composition of the sample taken from the molten metal.

(Added, Rev. N 1).

3.2. Surface quality and diameter of the wire is checked on each reel.

3.3. Check T. E. D. S. put every kopeleva the coil and one coil of copper wire of the party.

3.2; 3.3. (Changed edition, Rev. N 1).

3.4. Verification of mechanical properties, mass, electrical resistivity and size of the T. E. D. S. heterogeneity should be subjected to 3% of kobelevo coils and copper wires, but not less than three coils of wire from each of the material from the party.

Tested mechanical properties of the values scale T. E. D. S. heterogeneity of wire on the segments of 2 m length is carried out at the request of the consumer.

(Changed edition, Rev. N 1, 2).

3.5. If unsatisfactory test results of at least one of the indicators it is carried out re-testing at twice the sample taken from the same batch.

The results of repeated tests apply to the entire party.

4. TEST METHODS

4.1. Inspection of the appearance of the wire must be carried out without the use of magnifying devices.

4.2. Determination of the wire diameter and ovality is carried out in at least three places using a micrometer according to GOST 4381−87.

(Changed edition, Rev. N 1, 2).

4.3. Determination of the mass of wire on the coil should be performed by weighing on the scales with the measurement error not exceeding 1% by weight of the wire.

4.4. Definition of T. E. D. S. Kobeleva wire paired with copper is carried out using one of the methods given in annexes 4 and 5.

Definition of T. E. D. S. shall be conducted on segments of kobelevo wire, selected from the beginning and end of each coil of the party, and a segment of copper wire, taken from the beginning of any reel.

(Changed edition, Rev. N 1).

4.5. Define the scope of T. E. D. S. heterogeneity of wire should be 22663−77 churchyard.

4.6. For the test wire tensile from each selected coil cut on the same model. Sampling for tensile tests carried out according to GOST 24047−80.

The tensile test is carried out according to GOST 10446−80 on samples with an estimated length of 200 mm for copper and 100 mm for the alloy, Copel.

(Changed edition, Rev. N 1).

4.7. Determining values of electrical resistivity must be carried out according to GOST 7229−76.

4.8. To determine the chemical composition of each selected coil cut off one sample. Selection and preparation of samples for the determination of chemical composition is carried out in the churchyard 24231−80.

Chemical composition of copper wire is determined according to GOST 13938.1−78-GOST 13938.12−78;GOST 13938.13−77 or GOST 9717.1−82-GOST 9717.3−82; kopeleva — GOST 6689.1−92; GOST 6689.3−92-GOST 6689.7−92; GOST 6689.10−92; GOST 6689.12−92; GOST 6689.15−92-GOST 6689.20−92; GOST 6689.23−92 or other methods providing the required accuracy.

If there is disagreement in the assessment of the chemical composition of copper wire analysis is carried out according to GOST 13938.1−78-GOST 13938.12−78; kopeleva — GOST 6689.1−92, GOST 6689.3−92-GOST 6689.7−92, GOST 6689.10−92, GOST 6689.12−92, GOST 6689.15−92-GOST 6689.20−92, GOST 6689.23−92.

(Added, Rev. N 1).

5. PACKING, MARKING, TRANSPORTATION AND STORAGE

5.1. The wire should be wound on a spool with an outer diameter at least 50 mm.

5.2. The ends of the wire should be fastened on the spool. The wire on the coil should be covered with paper GOST 8273−75, and the coil is sealed in a plastic bag made from plastic film 0.1 mm in thickness according to GOST 10354−82.

5.3. Each coil shall be attached marked with the trademark or name and trademark of manufacturer;

legend wire;

rooms coil;

batch number;

net mass of wire;

stamp of technical control;

the date of issue.

5.4. Wire spool in plastic bags must be Packed in boxes of type I according to GOST 2991−85 or type I according to GOST 5959−80, lined inside with paper GOST 8828−89. Dimensions of boxes — GOST 21140−75.

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

5.5. Transport marking — according to GOST 14192−77 with application of manipulation sign «Afraid of dampness» and additional application of a batch number.

5.6. Each box must be attached to packing list stating:

the trademark or name and trademark of manufacturer;

legend wire;

batch number;

the number of coils or packages in the shipment;

the weight of the party;

the tare weight;

stamp of technical control;

the date of issue.

5.7. Weight of cargo must not exceed 35 kg.

5.2−5.7. (Changed edition, Rev. N 1).

5.8. (Deleted, Rev. N 1).

5.9. Wire transporterowych by all kinds of transport in covered vehicles in accordance with cargo carriage regulations applicable to transport of this species.

Wire in the boxes of type I according to GOST 5959−80 send postal parcels.

(Changed edition, Rev. N 1).

5.10. Wire should be stored indoors at temperatures from plus 10 to plus 35 °C and relative humidity of not more than 30% in the absence of contact with moisture and active chemical substances.

ANNEX 2 (informative). THEORETICAL WEIGHT of 1000 m of WIRE

ANNEX 2*
Reference

________________
* Annex 1 are excluded, Rev. N 2.

Material	Wire diameter, mm	Theoretical weight of 1000 m of wire, kg
0,2	0,279
Kopel	0,3	0,629
0,4	1,118
0,5	1,749
0,2	0,281
0,3	0,632
Copper	0,4	1,123
0,5	1,754

APPENDIX 3 (reference). MECHANICAL PROPERTIES OF MATERIALS AT LOW TEMPERATURES

APPENDIX 3
Reference

Material	Temperature, °C	Rupture strength, MPa (kgf/mm)	Yield strength , MPa (kgf/mm)	Elongation , %	The relative narrowing , %
20	414 (42,2)	134 (13,8)	40	77
-10	454 (46,3)	126 (12,9)	47	78
Kopel	-40	465 (47,4)	144 (14,7)	43	78
-80	496 (50,6)	152 (15,5)	48	78
-120	529 (54,0)	165 (16,9)	48	74
-180	616 (62,8)	181 (18,5)	57	76
20	215 (22,0)	58 (6,0)	48	76
-10	219 (22,4)	60 (6,2)	40	79
Copper	-40	231 (23,6)	62 (6,4)	47	77
-80	264 (27,0)	68 (7,0)	47	74
-120	282 (28,8)	73 (7,5)	45	70
-180	400 (40,8)	78 (8,0)	58	77

ANNEX 4 (required). 1. METHOD of MEASURING T. E. D. S. KOBELEVA WIRE PAIRED WITH COPPER

ANNEX 4
Mandatory

T. E. D. S. developed kopeleva wire paired with copper, determined at the boiling point of liquid nitrogen, sublimation of carbon dioxide and the boiling point of water.

1.1. Used measuring instruments and equipment

Exemplary 2-d level mediastinotomy thermoelectric thermometer.

Exemplary 3-th digit thermometer mercury glass.

The potentiometer of accuracy class not less than 0.05.

Bath of liquid nitrogen volume of not less than 2 years and not less than 350 mm with heat-insulated walls.

A block of copper compare with cylindrical sockets for exemplary thermoelectric thermometer and ligaments of the samples. Unit height of approximately 100 mm, the diameter of the block approximately 50 mm, the depth of nests of approximately 90 mm.

The Dewar thermostating the free ends of thermoelectrodes at the temperature of melting ice is 0 °C.

Switch resternotomy type PB-28B.

A set of glass tubes with a length of 160 mm with an inner diameter of not more than 5 mm.

Dewar height of approximately 400 mm and a volume of at least 2 L.

A laboratory autotransformer Latr-1M.

Voltmeter E377 type or E59.

Insulating PVC tube.

The type resistor PEV-25 wirewound 390 Ohm.

The glass tube of length approximately 450−500 mm with an internal diameter of approximately 10 mm.

The steam thermostat of the type TP-5.

1.2. Preparation of samples of wire and measurements

1.2.1. For calibration you need to prepare no more than nine segments of kobelevo wire and one length of copper wire of length 1.5 m each.

1.2.2. Form a welding or soldering the working end of the ligament, consisting of kopelevich and copper pieces of wire.

1.2.3. Reinforce each sample of wire insulation PVC pipe.

1.2.4. Soldered to the free end of each sample kopeleva of copper wire insulated conductor at a length of approximately 500 mm.

1.2.5. Put the free ends kopelevich samples in glass vials which must be poured dry transformer oil meets the requirements of GOST 982−80 (oil column height of about 10 mm) and close the hole of each vial with inserted loose ends with a piece of cotton.

1.2.6. Put the tube with the free ends kopelevich samples and the free end Konstantinovka of thermoelectrodes exemplary thermoelectric thermometer in the Dewar vessel with melting ice.

1.2.7. Collect the measuring diagram in hell.1. The positive electrode — copper attached to the «plus» terminal of the potentiometer.

Damn.1

Circuit diagram for measurement of T. E. D. S. couples
copper-Copel

1 - a bunch of samples; 2 — a model 2-d level mediastinotomy thermoelectric thermometer; 3 - Dewar vessel with melting ice; P — resternotomy switch; mV — potentiometer

Damn.1

1.3. Training means of verification and measurements

1.3.1. Determination of boiling point of liquid nitrogen

1.3.1.1. Poured into a bath of liquid nitrogen according to GOST 9293−74.

1.3.1.2. Put exemplary thermoelectric thermometer and a bunch of electrodes in the sockets of the block of comparison.

1.3.1.3. Omit the compare unit in a bath of liquid nitrogen to a depth of approximately 250−300 mm and kept at the boiling point of liquid nitrogen for approximately 15 min. scheme of the baths placed in it the unit of comparison on features.2.

Damn.2

Diagram of the baths placed in it a block of comparison

1 - a rubber or foam gasket; 2 — nests; 3 - copper block; 4 - the Dewar vessel; 5 — housing; 6 - stainless steel pendant; 7 — textolite flange; 8 — textolite cover

Damn.2

1.3.1.4. Conduct measurement of T. E. D. S. in the following order: T. E. D. C. the exemplary thermometer — T. E. D. S. kopelevich samples paired with copper — T. E. D. C. the exemplary thermometer and back.

The cycle is repeated for each of thermoelectrodes should be made not less than four counts. The results are entered into the Protocol of arbitrary shape.

1.3.2. Determining the point of sublimation of carbon dioxide

1.3.2.1. Food crushed solid carbon dioxide according to GOST 12162−77 in any way.

(Changed edition, Rev. N 1).

1.3.2.2. Fill the Dewar vessel with the crushed carbon dioxide so that the height of the layer was 50 mm. the Diagram of the device for receiving the point of sublimation of carbon dioxide given on features.3.

Damn.3

Diagram of the device for receiving the point of sublimation of carbon dioxide

1 — PTFE or rubber pad; 2 — Dewar vessel; 3 - housing; 4 - copper glass; 5 - the crushed carbon dioxide; 6 - heater; ATP — laboratory autotransformer; V — voltmeter

Damn.3

1.3.2.3. Placed on the surface of this layer is a heater (resistor type PEV-25 wirewound 390 Ohm).

1.3.2.4. Complement the Dewar of crushed carbon dioxide so that the height of the layer above the heater was approximately 50 mm.

1.3.2.5. Placed in the Dewar vessel the working end of the ligament samples and exemplary thermoelectric thermometer and completely fill the vessel of crushed carbon dioxide.

1.3.2.6. Served on heater voltage of approximately 100 V.

1.3.2.7. After 15 minutes reduce the voltage to 50 V to maintain the flow of vapors FROMthe vessel and to prevent diffusion of air into the receptacle.

1.3.2.8. Take measurements in the same order specified in paragraph 1.3.1.4.

1.3.3. Determination of the boiling point of water

1.3.3.1. Prepare steam thermostat to work.

1.3.3.2. Put the working end of the bundles in a glass test tube with a length of 450−500 mm.

1.3.3.3. Lower the test tube with a bunch of samples to a depth of 300 mm and a standard mercury glass thermometer in a thermostat and kept at the temperature of boiling water 15 min.

1.3.3.4. Take measurements in the same order specified in paragraph 1.3.1.4.

1.4. Processing of measurement results

1.4.1. The measurement result obtained the following data shown in the table.

Sample number	, °C	, MKV
1	-195,5	-6049
-77,3	-2959
-99,8	-4686

Note. - the arithmetic average of the T. E. D. S. of a pair of copper-Copel; -the value of the temperature measured by the thermometer model.


Given thermoelectric sensitivity () of the thermocouple copper — Kopel, equal at minus 196 °C 18 mV/deg, at minus 78 °C 34 µv/grad at plus 100 °C 52 µv/grad, get the following values of T. E. D. S. for a pair of copper-Copel:

at minus 196 °C — minus 6058 mV;

at minus 78 °C — minus 2983 mV;

at plus 100 °C plus 4696 µv

meets the standards specified in claim 2.2 of this standard.

The value of T. E. D. S. of a pair of copper-Copel in the range from minus 200 to plus 100 °C is calculated as follows:

1) calculate the deviation of T. E. D. S. () a pair of copper-Kopel from the standard calibration characteristics at a temperature of minus 196, 78 minus and plus 100 °C according to the formula

,

where is the arithmetic average of the T. E. D. S. of a pair of copper-Kopel,

- the standard calibration value of T. E. D. S.;

2) build a graph of the temperature at three points in the range from minus 200 to plus 100 °C;

3) determine the schedule a value at any point in the range;

4) calculate the value of T. E. D. S. () a pair of copper-Kopel at any temperature point according to the formula

.

APPENDIX 5 (mandatory). 1. DEFINITION of T. E. D. S. KOBELEVA WIRE PAIRED WITH COPPER USING STANDARD SAMPLES SOTM-KN and COTM-M1

ANNEX 5
Mandatory

1.1. Brief description of SOTM-M1 (N 1089−76 to Register)

Standard sample properties thermoelectrode material copper SOTM-M1 is a coil of wire made of copper M1E brand according to GOST 859−79 with a diameter of 0.2 mm and a length of 100 m.

Certified characteristics of — T. E. D. S. copper wire segments of the coil relative to the SOTM-m at a temperature of minus 196 °C, not exceeding ±2 µv.

Note. Standard sample properties thermoelectrode material copper SOTM-M represents 10 segments termoelektrodny wire copper grade M1E according to GOST 859−78 with a diameter of 0.2 mm and a length of 2 m with the certified value of T. E. D. S. regarding platinum (1,3920) at a temperature of minus 196 °C, is equal to 206±1 µv.

The value of the magnitude of T. E. D. S. heterogeneity throughout the length of the wire is determined with an error of not more than 2% at the boiling point of liquid nitrogen and not exceed 2.5 mV.

Standard sample SOTM-M1 is designed to monitor the copper wire used for making thermocouples copper — Kopel.

The method of application COTM-M1 and the presentation of results control of segments of copper wire shall conform to the «Instructions for application of standard sample properties thermoelectrode material copper SOTM-M1».

1.2. Brief description of SOTM-KN (N 1090−76 to Register)

Standard sample properties thermoelectrode material alloy Copel for low-temperature thermocouples SOTM-KN is a coil of wire alloy Copel brand Mnmc43−0,5 GOST 492−73 a length of 100 m and a diameter of 0.2 mm.

Certified characteristics of — T. E. D. S. of the segments of the wire coil paired with the standard sample SOTM-M in the range from minus 196 to plus 100 °C, which dependence on temperature is specified in a compulsory Appendix to the certificate of SOTM-KN.

The accuracy of the calibration characteristics of SOTM-KN in the temperature range does not exceed values of 0,3 °C, at a confidence level 0,9975.

The value of the magnitude of T. E. D. S. heterogeneity throughout the length of the wire is determined with an error not exceeding 2% at the boiling point of liquid nitrogen and not more than 7.6 µv.

Standard sample SOTM-Book intended for certification kopeleva wire used as thermoelectrodes thermocouples copper-Kopel.

Definition of T. E. D. S. couples Kopel — SOTM-KN is carried out by boelectronic comparisons in temperature the boiling point of liquid nitrogen, sublimation of carbon dioxide and water boiling with linear interpolation, the value of T. E. D. S. in the range between the temperature points. Interpolation error does not exceed ±6 mV, and temperature points are attributed to rounded up to 1 °C temperature according to GOST 8.157−75.

The method of application of SOTM-KN and the results of the verification of the segments of wire from alloy beads must comply with «Instructions for use of standard sample properties thermoelectrode material alloy Copel for low-temperature thermocouples SOTM-KN».

1.3. Example of calculation of the T. E. D. S. of a pair of copper-Copel

The measurement result obtained the following values of T. E. D. S. couples Kopel-SOTM-KN shown in the table.

Sample number	Temperature, °C	, MKV
1	-196	-17
-78	-7
+100	+15

Note.  — arithmetic mean value of the algebraic difference of T. E. D. S. between the test sample wire, and the sample SOTM-KN in test point.


The value of T. E. D. S. of a pair of copper-Copel calculated by the formula

,

where - the value of T. E. D. S. check point SOTM-SOTM relative to KN-M, equal to minus 6123 µv at minus 196 °C, minus 3019 µv at minus 78 °C and plus 4755 µv at plus 100 °C.

The value of T. E. D. S. is still at minus 196 °C minus 6140 µv at minus 78 °C 3026 µv minus and plus 100 °C plus 4770 mV, which satisfies the standards specified in claim 2.2 of this standard.

The value of T. E. D. S. of a pair of copper cut any coils from the party SOTM-M1 must not exceed ±5 mV.

APPENDIX 6 (mandatory)

APPENDIX 6
Mandatory

Wire diameter, mm	The ground wire on the coil, kg
not less than	no more
0,2	0,15	3,5
0,3	0,25	3,5
0,4	0,30	3,5
0,5	0,50	3,5

(Added, Rev. N 2).