GOST 5362-78

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  ГОСТ 5362-78

GOST 5362−78 of brass Strip. Specifications (with Amendments No. 1, 2, 3)

GOST 5362−78

Group В53

STATE STANDARD OF THE USSR

OF BRASS STRIP

Specifications

Brass ribbons. Specifications

GST 18 4520

Date of introduction 1980−01−01

Put IN ACTION the decision of the State Committee USSR on standards on November 24, 1978 N 3096

Limitation of actions taken by Protocol No. 4−93 of the Interstate Council for standardization, Metrology and certification (ICS 4−94)

REPLACE GOST 5362−50

REPRINT (July 1998) with Amendments No. 1, 2, 3, approved in March 1984, August 1986, March 1989 (IUS 7−84, 11−86, 7−89).


This standard applies to cold rolled brass strip for the manufacture of products by way of deep drawing.

(Changed edition, Rev. N 1, 3).

1. ASSORTMENT

1.1. The thickness and width of the strips and limit deviations thereon shall be as specified in table.1.

Table 1

1.2. Strips shall be manufactured with a length from 1 to 2 m.

Allowed to produce strips of a length of not less than 500 mm, not more than 15% of the batch weight.

The legend shall appear on the diagram:

Instead missing data are seen as X.

Example of designation of strip thickness of 3.90 mm, width 129 mm

Strip DPRAM 3,90х129 ND L68 GOST 5362−78

(Changed edition, Rev. N 1).

2. TECHNICAL REQUIREMENTS

2.1. Bands shall be manufactured in accordance with the requirements of this standard for technological regulations approved in the prescribed manner of a brass brand L68 with the chemical composition given in table.2.

Table 2

(Changed edition, Rev. N 1).

2.2. Bands shall be manufactured in soft (annealed) state.

2.3. The surface of the strips should be smooth and pure, without captivity, sinks, bubbles, cracks, breaks, foreign inclusions, deep fingerprints, scratches, delaminations. These surface defects cut out or painted over with permanent paint. No more than one a filled surface area of more than 4 cm200 mm long strips.

On the surface of the strips allowed small blisters, slivers, punctures, dents and fingerprints, does not display the strip at reference sweep for tolerances for thickness. Should not be more than one defect per 300 mm length of the strip. The presence of these bands allowed in an amount of not more than 25% of the batch weight.

2.4. Strips must be cut at right angle. Slant the cut ends should not exceed 10 mm.

2.5. Camber strips shall not exceed 4 mm per 1 m length.

2.6. The flatness of strips in the longitudinal direction should not exceed 10 mm per 1 m length.

2.7. The mechanical properties of the strips should match:

temporary resistance , MPa (kgf/mm) — 290−340 (30−35);

elongation after rupture ,%, not less than 50.

(Changed edition, Rev. N 1).

2.8. The microstructure of the metal strips should consist of equiaxed grains of alflatun with a grain size of 0.02 to 0.09 mm.

2.9. The strip shall withstand a test cutting and roll-up caps. The number of defective caps must not exceed 1% of the total cut of the caps. Considered defective caps with dissection and rupture of the walls or the bottom.

Note. Caps obtained from blanks cut from the shaded places of the strip, the number of defective not counted.

3. ACCEPTANCE RULES

3.1. Stripes take parties. The weight of the batch should not exceed 2500 lbs. the Party should consist of bands of one size and annealed in the same cage the last annealing.

Note. After annealing in continuous furnaces for draft adopted a number of strips annealed in one shift.


For strips with a thickness of 2.20−2,63 mm party must consist of bands with fluctuations in thickness not more than 0.05 mm.

Strip length of 0.5 to 1 m completed separately from the strips with a length of 1 m and more.

The party must be accompanied by a document about quality that contains:

trademark or a trademark and the name of the manufacturer;

the symbol of the band;

the results of mechanical tests;

grain size;

the results on cutting and convolution caps;

batch number;

the weight of the party.

(Changed edition, Rev. N 1).

3.2. Quality control of the surface dimensions (except thickness and camber) is subjected to each lane.

To measure camber taken away two lanes from the party.

To control the thickness of the strip from party strip taken «blind» by the method of maximum objectivity, according to GOST 18321−73. Plans of control — according to GOST 18242−72. The number of monitored bands are selected in accordance with table.3.

Table 3

The number of controlled points on each selected lane is determined depending on the total number of parcels with a length of 100 mm along the perimeter strip in accordance with the table.4.

Table 4

PCs

If the perimeter of a simple 100 mm end section of a length less than 100 mm is taken for one site.

Selected bands considered valid if the number of measurements is not appropriate table.1, less than the acceptance number specified in table.4.

Allowed to the manufacturer on the basis of control to check the thickness of each strip party.

Allowed the manufacturer to control the thickness of the strip in the production process.

Customer’s request thickness control is conducted on each lane of the party.

(Changed edition, Rev. N 3).

3.3. To control the mechanical properties, the microstructure of each full and partial tons of bands take two lanes. Control of the microstructure is carried out at the request of the consumer.

3.4. To control for felling and convolution caps from each complete and incomplete tons of bands take away one lane. Control on felling and convolution caps held at the request of the consumer.

3.5. To determine the chemical composition of selected two bands from party. On the manufacturer sampling for determining the chemical composition may be performed from liquid metal.

3.6. If unsatisfactory test results of at least one of the indicators (except thickness) for him to repeat the test at twice the number of lanes taken from the same batch. The results of repeated tests apply to the entire party.

(Changed edition, Rev. N 3).

4. TEST METHODS

4.1. The surface quality of the test strips without the use of magnifying devices.

4.2. The thickness of the strip is measured with a micrometer according to GOST 6507−90. The change in the thickness of the strip is carried out at a minimum distance of 100 mm from the end and not less than 10 mm from the edge.

Control of the thickness of the strips is carried out with a given probability of 96%. The thickness of the strip at each selected band is measured at points located uniformly randomly on the perimeter of the strip.

The number of bands in the party (M) is calculated according to the formula

.

where the weight of the batch, kg;

 — material density, g/cm;

 — strip thickness, mm;

 — band width, mm;

the length of the strip, mm.

Number of controlled sections in the band () is calculated by the formula

.

The results of measuring the strip thickness that do not correspond to the values given in table.1, should not differ from the permissible by more than half of the pitch limit deviation, except for strips of a thickness of 2.20 mm and of 2.63 for which the allowable difference should not be more than 0.05 mm.

Allowed to the manufacturer in the production process to control the thickness of the strip other means of measurement, to ensure the necessary accuracy.

(Changed edition, Rev. N 3).

4.2. The width of the bands measured by Vernier caliper according to GOST 166−89 or metal ruler according to GOST 427−75.

Allowed the width of the bands to determine other means of measurement, to ensure the necessary measurement accuracy.

The measurement bandwidth is carried out at three sites: at both ends and in the middle part.

(Added, Rev. N 3).

4.3. Check skew cutting is carried out using the calibration of a square according to GOST 3749−77.

4.4. Measurement of the camber of the bands is carried out according to GOST 26877−91. Allowed to measure the camber using other methods providing the required accuracy of measurement.

If there is disagreement in the definition of the camber measurement is carried out in the churchyard 26877−91.

(Changed edition, Rev. N 3).

4.5. To check for warpage strip freely placed on the plate and measured using probes on the other 2−034−225−87 or ruler according to GOST 427−75 the maximum deviation of the strip from the plane of the plate in the direction of rolling.

(Changed edition, Rev. N 3).

4.6. To control the microstructure of the strips of each band selected for the test cut out along the direction of rolling at a minimum distance of 15 mm from the edge of one sample.

Control of the microstructure is carried out according to GOST 21073.0−75, GOST 21073.1−75. Grain size should be not less than 8 points and no larger than 4 points (in the linear magnification of 100).

(Changed edition, Rev. N 1).

4.7. For tensile testing from each selected strip cut one sample in the direction of rolling. Selection of samples for tensile tests carried out according to GOST 24047−80.

Tensile test strips of a thickness more than 3 mm is carried out on samples of type I, width 20 mm () with an initial estimated length according to GOST 11701−84.

Tensile test strips of a thickness of 3 mm and more is carried out on samples of type I, width is 20 mm with an initial estimated length according to GOST 1497−84.

(Changed edition, Rev. N 2).

4.8. (Deleted, Rev. N 1).

4.9. Caps cut down and roll on the press: the strip length less than 1000 mm cut and roll caps across the width of the strip. This test is carried out and also in the enterprise, the consumer before you start the metal in manufacture.

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

The chemical composition of the bands is determined according to GOST 25086−87, GOST 1652.1−77 — GOST 1652.13−77, GOST 9716.1−79 — 9716.3 GOST-79.

(Changed edition, Rev. N 1).

5. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

5.1. Each strip shall be marked with indelible paint batch number and quality control Department stamp.

Paint color should be different from the paint which is painted over the defective locations of the bands.

5.2. Strips should be Packed in bundles.

5.3. Bundles of strips should be wrapped with paper GOST 8273−75 GOST 2228−81 or other materials that do not deteriorate the surface quality of the strips according to the normative-technical documentation. Bundles must be protected from both sides (top and bottom) with boards or wooden boards, the dimensions of which correspond to the width and length of the stack.

Packed bundles of strips of bandage in at least three places with tape, not less than 0,3x20 mm according to GOST 3560−73 or wire with a minimum thickness of 2 mm according to GOST 3282−74. The ends of the straps are fastened to the lock, wire — stranding at least five turns.

The mass of a pack should not exceed 80 kg, at mechanized loading and unloading — no more than 1000 kg.

The formation of packages in overpacks shall be conducted in accordance with carriage rules, approved by the relevant departments. Weight and dimensions of packages — according to GOST 24597−81.

Packaging should be carried out on pallets according to GOST 9557−87 or without pallets using the bricks of size not less than 50x50 mm and a length equal to the width of the package.

Transport packages must be wrapped in at least two areas or cross wire with a diameter of not less than 3 mm according to GOST 3282−74 or tape of size not less than 0,5x30 mm according to GOST 3560−73.

The ends of the tying wire are held together by twisting at least five turns of tape to the castle.

Allowed in carload shipment to a single address or when shipping in containers according to GOST 18477−79 packs of strips to be transported without the protection of wooden planks or boards.

Packing strips that are sent to the far North and equated to them shall be carried out according to GOST 15846−79, in the group «Metals and metal products."

(Changed edition, Rev. N 1, 3).

5.4. Weight of cargo must not exceed 1000 kg.

5.5. For each bundle of strips should be firmly attached label according to GOST 14192−96 with the indication:

trademark or a trademark and the name of the manufacturer;

band legend;

the weight of the party;

batch number.

Transport marking of packages, the place and method of application — according to GOST 14192−96с the batch numbers and the manipulation sign «Protect from moisture». Allowed to affix directly to the Board.

5.4, 5.5. (Changed edition, Rev. N 1).

5.6. (Deleted, Rev. N 1).

5.7. Transportation lanes is carried out by all kinds of transport in covered vehicles in accordance with cargo carriage regulations applicable to transport of this species.

Transportation lanes by rail is small and carload shipments.

(Changed edition, Rev. N 1).

5.8. Strips should be stored indoors, in conditions that exclude them from mechanical damage and contamination of moisture and active chemical substances.

The text of the document is verified by:
the official publication of the

M.: IPK Publishing house of standards, 1998