GOST 15471-77

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  ГОСТ 15471-77

GOST 15471−77 Strips and ribbons of oxygen-free copper for electronics. Specifications (with Amendments No. 1, 2, 3)

GOST 15471−77

Group В53

STATE STANDARD OF THE USSR

STRIPS AND RIBBONS OF OXYGEN-FREE COPPER
FOR ELECTRONIC EQUIPMENT

Specifications

Strips and ribbons of oxygen-free copper
for electronics. Specifications

GST 18 4400

Date of introduction 1978−01−01

INFORMATION DATA

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

DEVELOPERS

L. P. Seleznev, candidate. tech. Sciences, M. B. Taubkin, PhD. tech. of Sciences (leader), N. With. Izvolsky

2. APPROVED AND promulgated by the Decree of the State Committee of standards of Ministerial Council of the USSR from 28.03.77 N 762

3. REPLACE GOST 15471−70

4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

5. REISSUE with Amendments No. 1, 2, 3, approved in November 1982, June 1987, January 1990 (IUS 2−83, 10−87, 4−90)
This standard applies to hot-rolled strips and cold rolled strips and ribbons of oxygen-free copper used in electronics.
(Changed edition, Rev. N 3).

1. ASSORTMENT

1.1. Thickness width hot rolled strips and limit deviations thereon shall be as specified in table.1.

Table 1

mm

1.2. Thickness width cold rolled strips and limit deviations thereon shall be as specified in table.2.

Table 2

mm

Note. Strip high accuracy in thickness and width are made from 01.01.90.


(Changed edition, Rev. N 2).

1.3. Length of strips shall be as defined in table.3.

Table 3

Note. At the customer’s request strip thickness up to 25 mm inclusive manufactured lengths or multiple of fixed lengths within the random with a maximum deviation of +10 mm.

1.4. Thickness, ribbon width and maximum deviations thereon shall be as specified in table.4.

Table 4

mm

Notes:

1. Tape with a thickness of 0.5 mm or more manufactures of a width of 20 mm. At the demand of the consumer is allowed to produce a tape with a thickness of 2.5 mm and a width of 105 and 115 mm with the thickness tolerance of minus 0.12 mm (normal precision) and minus 0.11 mm (high precision) and with a width tolerance of plus 2 mm

2. Ribbon increased accuracy in width is manufactured from 01.01.90.

3. Theoretical weight of 1 mof strip is given in the Appendix.

1.5. Length of strips shall be as given in table.5.

Table 5

Each party allowed tape length less than 5 m not more than 15% by weight of the party.

At the request of the consumer tape is manufactured with a length of respectively table.6.

Table 6

Each party allowed tape length less than 7 m in an amount of not more than 15% by weight of the party.

1.4, 1.5. (Changed edition, Rev. N 2).

The legend shall appear on the diagram:

when the following abbreviations:

The sign «X» is placed instead of the missing data (except for length and special conditions).

Examples of symbols

Strip, hot-rolled, normal accuracy in thickness and width, size 3.5, 40 mm, random length, made of copper brand Mob:

Strip PRNH 3,540 ND Mob GOST 15471−77

Strip cold rolled, normal accuracy in thickness and width, solid, size 4.070 mm, a length of a multiple of 0.5 mm of copper of the mark Mob of the molded workpiece:

Strip DPRNT of 4.0700.5 CD Mob 3 GOST 15471−77.

(Changed edition, Rev. N 2).

2. TECHNICAL REQUIREMENTS

2.1. Bands and ribbons must be manufactured in accordance with the requirements of this standard for technological regulations approved in the prescribed manner.

And strips made out of copper of the mark Mob with GOST 859−78 with silicon content less than 0.003%.

(Changed edition, Rev. N 1).

2.2. Cold-rolled strip and strips are manufactured in the solid state.

2.3. The surface of the strip must be free from contamination, hinder visual inspection.

Allowed individual surface defects (dents, scratches, small slivers, and nakoly) if they do not withdraw and strip at reference sweep for tolerances for thickness. Allowed color of a tint and local darkening.

On the surface of hot-rolled strips, moreover, allowed the roughness of the prints from the rolls in the form of a fine mesh, not bringing the strip at reference sweep for tolerances for thickness. Hot rolled strip is not etched.

Note. By agreement with the consumer surface quality of cold rolled strips and tapes sets from the samples approved in the established order.

2.4. Bands and ribbons should be trimmed evenly and must not have significant burrs. Wavy, wrinkled and ragged edge is not allowed. The edge of the hot-rolled strips with thickness of 25 mm or more is not clipped.

2.3, 2.4. (Changed edition, Rev. N 1, 2).

2.5. Camber per 1 m of length shall not exceed:

4 mm for cold rolled strips;

3 mm — for tapes.

2.6. And strips should be resistant against hydrogen embrittlement.

(Changed edition, Rev. N 3).

2.7. At the customer’s request tape after annealing needs to have an average grain size shown in table.7.

Table 7

Note. The average grain size for strips from hot rolled billet and the size of the largest grains are optional before 01.01.92.


(Added, Rev. N 2).

3. ACCEPTANCE RULES

3.1. Strip and ribbon take parties. The party should consist of a strip of the same size, the same brand of copper, one of accuracy and be accompanied by a document about quality that contains:

trademark or a trademark and the name of the manufacturer;

designation strips or tapes;

the results of the tests at the request of the consumer;

the batch number and the weight of the batch.

The weight of the batch should not exceed 3,000 kg.

(Changed edition, Rev. N 1).

3.2. Inspection of the surface and the measurement should be subjected to each strip or tape of the party.

3.3. To check the chemical composition of the selected four-lane or four tapes from the party. Allowed the manufacturer to carry out the sampling from the molten metal. Sampling and sample preparation — according to GOST 24231−80.

(Changed edition, Rev. N 1, 2).

3.4. To determine the grain size and resistance to hydrogen embrittlement select one strip or tape from each of 300 kg the party, but at least two strips or tapes from the party.

(Changed edition, Rev. N 2).

3.5. If unsatisfactory results at least in one of the figures it is carried out re-tests on twice the number of samples taken from the same batch. The results of repeated tests apply to the entire party.

4. TEST METHODS

4.1. The inspection of the surface of the strip is produced without the use of magnifying devices.

4.2. Measure the thickness of the strip is produced by micrometer according to GOST 6507−90.

Measure the width of the strip to produce a ruler according to GOST 427−75 or caliper according to GOST 166−89.

Measurement shall be both the end and the middle part of the strip.

The thickness of the strip is measured at a distance of not less than 50 mm from the end and not less than 5 mm from the edge.

4.3. Camber — according to GOST 26877−91.

(Changed edition, Rev. N 3).

4.4. To check the chemical composition of the selected one sample from each check strip. Chemical composition is determined by GOST 13938.1−78 — GOST 13938.12−78, GOST 13938.13−69 and GOST 9717.1−82 — GOST 9717.3−82.

Selection and preparation of samples for chemical analysis according to GOST 24231−80.

(Changed edition, Rev. N 2).

4.4. To determine the amount of grain taken one sample from each check strip and annealed at a temperature of 600 °C for 1 h.

The average grain size determined according to GOST 21073.0−75, GOST 21073.1−75.

(Added, Rev. N 2).

4.5. For the determination of the resistance against hydrogen embrittlement from each tape selected for the test cut samples of 10 mm width and a length of (100+10) mm in the direction of plastic deformation.

Of strips of a thickness more than 2 mm samples made of cold rolling or mechanical cutting in the direction of the deformation.

The samples cut from the strips must have the following dimensions: thickness 2 mm, width 10 mm and length of (100+10) mm.

Determination of the resistance against hydrogen embrittlement was carried out according to GOST 24048−80методом annealing in hydrogen at a temperature of (850±25) °C for 30 min, followed by a test on excess or metallographic control. If there is disagreement in the evaluation of resistance against hydrogen embrittlement determination is carried out metallographic control.

Visual inspection of the annealed in hydrogen samples on the surface should be no blisters and cracks.

The samples shall withstand without breakage into two parts is not less than 10 bends at 180° in the plates with a radius of curvature equal to 2,5 times the thickness of the sample.

Samples for metallographic control should be cut so that the plane of the cone was parallel to the direction of plastic deformation, one of the sides must not be machined.

Observation under a microscope is carried out at 200 x magnification. At the grain boundaries in the microstructure should be free of pores and cracks.

(Changed edition, Rev. N 2).

5. PACKING, MARKING, TRANSPORTATION AND STORAGE

5.1. Cold rolled steel strips in bundles contact wire according to GOST 3282−74 or tape according to GOST 3560−73 symmetrically in at least three places.

Strip thickness over 5 mm is allowed to bind in bundles.

Strip paper GOST 8273−75 and Packed in tight wooden boxes of the type II and III according to GOST 2991−85 dimensions corresponding to the dimensions and weight of the cargo.

Tape must be rolled into rolls.

Rolls of ribbons tied symmetrically wire according to GOST 3282−74 or tape according to GOST 3560−73 in at least three places, wrapped with paper GOST 8273−75 and Packed in tight wooden boxes of the type II and III according to GOST 2991−85 dimensions corresponding to the dimensions and weight of the cargo.

Allowed to use other packaging materials according to technical documentation approved in the established procedure, do not impair the quality of packaging and ensures a mechanized loading.

At the request of the consumer between the strips or turns of the ribbon cable laid paper according to GOST 645−89 or telephone paper according to GOST 3553−87.

Hot rolled strip is not Packed.

Consolidation packages (boxes, packs and individual bands) shall be transported in transport packages in accordance with the requirements of NTD. Packs are on pallets churchyard 9078−74 with strapping in at least three areas of the packaging tape according to GOST 3560−73.

When mechanized loading and unloading is allowed weight of cargo space is not more than 1000 kg.

(Changed edition, Rev. N 1).

5.2. The mass of the packing space should not exceed 80 kg.

By agreement with the consumer allowed weight packaging places more than 80 kg.

5.3. Strip and ribbon transporterowych by all kinds of transport in covered vehicles in accordance with cargo carriage regulations applicable to transport of this species.

Bundles of strips, the rolls of strips and the individual strips, wrapped in paper, can be transported in universal containers by railway GOST 22225−76, GOST 20435−75 without packing in boxes. Strip or tape must be laid and also using struts strengthened so that they do not move inside containers during transportation.

(Changed edition, Rev. N 1).

5.4. On each strip, not bound in bundles, shall be specified:

a) name or trademark of the manufacturer;

b) grade of copper;

C) the batch number;

d) the stamp of the technical control Department.

5.5. Each bundle of strips and each roll of tape shall be fitted with a paper label that States:

designation strips or ribbons;

batch number;

stamp of technical control Department.

(Changed edition, Rev. N 1).

5.6. In each box or container must be attached to packing list which must include:

a) name or trademark of the manufacturer;

b) grade of copper;

in) size strips or tapes;

g) the batch number;

d) net mass of the party;

e) designation of this standard.

5.7. Transport marking of packages — according to GOST 14192−77 with the additional inscription of the batch number.

(Changed edition, Rev. N 1).

5.8. (Deleted, Rev. N 1).

5.9. During storage and transportation and strips must be protected from mechanical damage, moisture and active chemical substances.

5.10. Packaging and transport of the strip in the far North or remote areas — according to GOST 15846−79.

5.11. The consumer needs to withstand and strips, unopened for at least three days. And strips should be stored indoors, in boxes or on shelves, pallets and racks.

5.10, 5.11. (Added, Rev. N 1).

APPLICATION (reference). Theoretical weight of 1 square meter of the strip

APP
Reference

Theoretical weight of 1 mof strip

Note. When calculating theoretical weight of 1 mof the strip the density of copper is taken equal to 8.9 g/cm.