GOST 15835-2013

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  ГОСТ 15835-2013

GOST 15835−2013 Rods made of beryllium bronze. Specifications

GOST 15835−2013

Group W55

INTERSTATE STANDARD

RODS MADE OF BERYLLIUM BRONZE

Specifications

Beryllium bronze bars. Specifications

ISS 77.150.30

Date of introduction 2015−01−01

Preface

Goals, basic principles and main procedure of works on interstate standardization have been established in GOST 1.0−92 «interstate standardization system. Basic provisions» and GOST 1.2−2009 «interstate standardization system. Interstate standards, rules and recommendations on interstate standardization. The procedure of development, adoption, application, renewal and cancellation"

Data on standard

1 DEVELOPED by the Technical Committee for standardization TC 106 «Tsvetmetprokat», Scientific-research, project and design Institute for alloys and processing of nonferrous metals open joint stock company «Institute tsvetmetobrabotka» (JSC «Institute tsvetmetobrabotka»)

2 SUBMITTED by the Technical Secretariat of the Interstate Council for standardization, Metrology and certification

3 ACCEPTED by the Interstate Council for standardization, Metrology and certification by correspondence (minutes No. 62-P of December 3, 2013)

The standard was accepted by voting:

4 by Order of the Federal Agency for technical regulation and Metrology, dated 22 November 2013 No. 2004-St inter-state standard GOST 15835−2013 introduced as a national standard of the Russian Federation from January 01, 2015

5 REPLACE GOST 15835−70


Information about the changes to this standard is published in the annual reference index «National standards», and the text changes and amendments — in monthly information index «National standards.» In case of revision (replacement) or cancellation of this standard a notification will be published in the monthly information index «National standards». Relevant information, notification and lyrics are also posted in the information system of General use — on the official website of the Federal Agency for technical regulation and Metrology on the Internet

1 Scope

This standard applies to round, square, hexagonal bars, drawn and extruded round bars and rods of beryllium bronze, used in instrument and mechanical engineering.

The standard specifies the dimensions, technical requirements, acceptance rules, methods of control and testing, marking, packaging, transportation and storage of rods.

2 Normative references

This standard uses the regulatory references to the following international standards:

GOST 427−75 Rulers measuring metal. Specifications

GOST 1497−84 (ISO 6892−84) Metals. Test methods tensile

GOST 2999−75 Metals and alloys. Methods of measuring the hardness Vickers

The Wire GOST 3282−74 General purpose low carbon steel. Specifications

GOST 3560−73 package steel Strip. Specifications

GOST 4381−87 Micrometers lever. General specifications

GOST 6507−90 Micrometers. Specifications

GOST 7502−98 metallic measuring tape. Specifications

GOST 8026−92 Line calibration. Specifications

GOST 9012−59 (ISO 410−82, ISO 6506−81) Metals. Method of measuring hardness Brinell hardness

GOST 9557−87 flat wooden Pallet size of 8001200 mm. Technical specifications

GOST 14019−2003 Materials metal. Test method for ISEB

GOST 14192−96 Marking of cargo

GOST 15027.1−77 Bronze without tin. Method for determination of copper

GOST 15027.2−77 Bronze without tin. Methods for determination of aluminium

GOST 15027.3−77 Bronze without tin. Methods of iron determination

GOST 15027.5−77 Bronze without tin. Methods for determination of Nickel

GOST 15027.6−77 Bronze without tin. Methods for determination of silicon

GOST 15027.7−77 Bronze without tin. Methods for determination of lead

GOST 15027.8−77 Bronze without tin. Methods for determination of arsenic

GOST 15027.9−77 Bronze without tin. Methods for determination of antimony

GOST 15027.10−77 Bronze without tin. Methods for determination of tin

GOST 15027.11−77 Bronze without tin. Methods for determination of phosphorus

GOST 15027.12−77 Bronze without tin. Methods for determination of zinc

GOST 15027.13−77 Bronze without tin. Methods for determination of beryllium

GOST 15027.14−77 Bronze without tin. Methods for determination of titanium

GOST 15027.15−77* Bronze without tin. Methods for determination of cobalt
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* On the territory of the Russian Federation GOST 15027.15−83. — Note the manufacturer’s database.

GOST 15027.16−77* Bronze without tin. Methods for determination of cadmium
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* On the territory of the Russian Federation GOST 15027.16−86. — Note the manufacturer’s database.

GOST 15027.17−77* Bronze without tin. Methods for determination of silver
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* On the territory of the Russian Federation GOST 15027.17−86. — Note the manufacturer’s database.

GOST 15027.18−77* Bronze without tin. Methods for determination of chromium
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* On the territory of the Russian Federation GOST 15027.18−86. — Note the manufacturer’s database.

GOST 15027.19−77* Bronze without tin. Methods for determination of tellurium
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* On the territory of the Russian Federation GOST 15027.19−86. — Note the manufacturer’s database.

GOST 15027.20−77* Bronze without tin. Methods for determination of magnesium
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* On the territory of the Russian Federation GOST 15027.20−88, here and hereafter. — Note the manufacturer’s database.

GOST 15846−2002 Products that are sent to the far North regions and equated areas. Packing, marking, transportation and storage

GOST 18175−78 of Bronze without tin pressure treated. Brand

GOST 20068.1−79 Bronze without tin. Method of spectral analysis on a metal standard samples with photographic registration of spectra

GOST 20068.2−79 Bronze without tin. Method of spectral analysis on a metal standard samples with photoelectric spectra

GOST 20068.3−79 Bronze without tin. Method of spectral analysis of oxide standard specimens with photographic registration of spectrum

GOST 20068.4−88 Bronze without tin. X-ray spectral fluorescent method for determination of aluminium

GOST 20435−75 the universal metal closed Container of nominal gross mass 3,0 t specifications

GOST 21073.0−75 ferrous Metals. Determination of grain size. General requirements

GOST 21073.3−75 ferrous Metals. Determination of grain size by the method of counting intersections bean

GOST 24047−80 Semi-finished products from nonferrous metals and their alloys. Sampling for tensile test

GOST 24231−80 non-ferrous metals and alloys. General requirements to selection and preparation of samples for chemical analysis

GOST 24597−81 the packaged goods. Basic parameters and dimensions

GOST 25086−2011 non-ferrous metals and their alloys. General requirements for methods of analysis

GOST 26663−85 transport Packs. Formation with the use of packaging. General technical requirements

Note — When using this standard appropriate to test the effect of reference standards in the information system of General use — on the official website of the Federal Agency for technical regulation and Metrology on the Internet or in the annual information index «National standards» published as on January 1 of the current year, and the editions of the monthly information index «National standards» for the current year. If the reference standard is replaced (changed), when using this standard should be guided by replacing (amended) standard. If the reference standard is cancelled without replacement, then the situation in which the given link applies to the extent that does not affect this link.

3 Terms and definitions

This standard applies the following terms with respective definitions:

3.1 rod: a Solid product obtained by pressure treatment, uniform cross-section throughout its length, in the form of a circle, square, regular polygons, supplied in straight lengths or rolled in the Bay.

3.2 captivity: defect of a surface, representing a delamination of the metal azkabanu forms, United with the base metal on one side.

3.3 dent: Local deepening of various sizes and shapes with sloping edges.

3.4 bullies: the Defect of the surface in the form of a wide longitudinal recess with an irregular bottom and the edges formed due to a sharp friction of individual sections of prefabricated about the details of rolling and finishing equipment.

3.5 cosinus cutting: Deviation from perpendicularity at which the cutting plane forms with the longitudinal planes of steel angle different from 90°.

3.6 curvature: deviation from straightness, in which not all of the point lying on the geometrical axis of the rod, equidistant from the horizontal or vertical plane.

3.7 press Utina: an inconsistent extruded product in the form of delamination of the metal or leakage occurring at the end of the molded product adjacent to the press-residue, as a result of uneven flow of metal during compaction.

3.8 shell: the deepening on the surface of the product from the chipping of impurities.

3.9 bundle: the discontinuity of metal, oriented along the direction of deformation.

3.10 risk: the defect of the surface of the semifinished product in the form of narrow longitudinal recesses with a rounded or flat bottom, formed as a result of scratching the metal surface protrusions on the surface of rolling and finishing equipment.

3.11 crack: the defect surface, which is a rupture of the metal.

4 Assortment

4.1 the Nominal diameters of round drawn bar and nominal diameters of the inscribed circle of the square and hexagonal bars tolerances for them to conform to the values specified in table 1.


Table 1

4.2 the Nominal diameters of the extruded rods of circular cross section and tolerances for diameter shall conform to the values specified in table 2.


Table 2

4.3 Ovality of round bars should not display the sizes of bars for limit deviation for diameter.

4.4 Diameters, cross-sectional area and theoretical weight of 1 m of round, square and hexagon bars given in Appendix A.

4.5 the length of bars made of random length.

Form of delivery, size and random length bars are shown in table 3.


Table 3

In the party of bars with variable length are allowed the cropped bars: not more than 15% of the batch weight:

— length less than 1 m for bars with diameter up to 40 mm incl.,

— length less than 0.8 m, for bars with diameter from 40 to 60 mm;

— length less than 0.5 m — for bars with diameter over 80 mm.

At customer’s request bars high and the increased accuracy produce without small logs.

4.6 legend bars are placed according to the scheme:

Use the following abbreviations:

The sign «X» is placed in place of missing data.

Examples of symbols of bars:

Rod, drawn, round, high precision manufacturing, soft (after quenching) diameter 19,0 mm, random length, bronze brand Brb2

Rod DCRP M 19 ND Brb2 GOST 15835−2013.

Rod round steel bars, hexagonal, normal precision manufacturing, rigid (after quenching), with a diameter of 19 mm, random length, bronze brand Brb2

Rod DSGN T 19 ND Brb2 GOST 15835−2013.

The extruded rod with a diameter of 60 mm random length bronze brand Brb2

Rod PCRH 60 ND Brb2 GOST 15835−2013.

5 Technical requirements

5.1 Bars manufactured in accordance with the requirements of this standard according to the technical documentation of the manufacturer, duly approved.

5.2 Bars are made from bronze brand Brb2 with the chemical composition according to GOST 18175.

5.3 Surface bars should be free from contamination, hinder visual inspection, no cracks and delamination.

On the surface allowed individual slivers, dents, shells, scratches, scores and other defects, as well as koltsevatost, traces changes, if they control the sweep cannot make the bars for limit deviation for diameter. Allowed traces of the technological lubricant, as well as the color of a tint and redness of the surface after annealing and etching.

Bars are not allowed internal defects in the form of shells, non-metallic inclusions and press utain.

Note — rods with a diameter of 70 mm and allowed more small point of time. At the request of the consumer the quality of fracture sets according to the samples approved in the established order.


Broken off the end of the rod after removal of the press utiny the method of bend at the dispatch cut.

5.5* the Bars must be straightened. The local curvature of the bars at 1 m must not exceed the values given in table 4.
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* Numbering corresponds to the original. — Note the manufacturer’s database.

The overall curvature of the rod should not exceed the limit values of the local curvature of 1 m for the total length of the rod in meters.

Bars soft on straightforwardness do not check.


Table 4

5.6 Bars must be supplied trimmed evenly from both sides.

The cut shall be perpendicular to the axis of the rod.

Delivery of bars with a diameter of 15 mm and less with the cut ends.

5.7 Rods are made:

— soft (tempered);

— solid (cold-worked after quenching);

— extruded.

5.8 Mechanical properties of bars shall conform to the requirements specified in table 5.


Table 5

5.9 Mechanical properties of samples drawn bar after dispersion hardening (aging) shall be as specified in table 6.


Table 6

5.10 solid cold-drawn Rods 10 mm in diameter or less, intended for the manufacture of springs are tested on the wound. When testing a winding, the bar should not be cracked and should not delaminate.

5.11 Drawn solid bars with the bend test shall withstand the cold, without showing signs of strain and exfoliation bending 90 degrees.

5.12 At the request of the consumer, the aged microstructure after quenching the samples taken from bars of bronze brand Brb2 must have a uniform distribution of inclusions, phases and grain size set forth by the standards agreed to by the parties.

Note — At the request of the consumer, the average grain size should not exceed 50 microns.

6 acceptance Rules

6.1 Bars take parties. The party must consist of bars of one method of manufacture, one state, one precision manufacturing, one cross-sectional shape, the same size.

The party must be issued a document about quality that contains:

is the trademark or name and trademark of manufacturer;

— the name of the country of manufacture;

— legal address of the manufacturer and (or) the seller;

— the symbol bars;

— test results (as required);

— the batch number;

— the weight of the batch.

The weight of the batch shall be not more than 1000 kg.

Allowed to issue one document about quality for several batches of bars delivered simultaneously to the same consumer.

6.2 Checking exterior surfaces and control sizes are subjected to each bar of the party.

6.4* To check the curvature, strength and elongation in the delivery state and after hardening of the dispersion and to test for bent, wound, fracture, hardness, and determination of grain size are taken in two bar or two bunches from the party.
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* Numbering corresponds to the original. — Note the manufacturer’s database.

The test winding is carried out at the request of the consumer.

6.5 To check the chemical composition of the selected two rods, or two bunches from the party. Allowed the manufacturer checks the chemical composition carried out on the sample taken from the molten metal.

6.6 If unsatisfactory test results of at least one of the indicators, it conducted a re-test of the doubled sample taken from the same batch.

The results of repeated tests spread to the entire party.

Allowed the manufacturer to carry out continuous testing of rods.

7 Methods of inspection and testing

7.1 visual inspection the surface of the rods is carried out without the use of magnifying devices.

7.2 Measurement of diameter and ovality of round bars is carried out in at least two mutually perpendicular directions and the diameter of the inscribed circle of the square and hexagonal bars in any two directions of the same section of a micrometer according to GOST GOST 6507или 4381.

7.3 the length of the bars measured by tape according to GOST 7502 or metal ruler according to GOST 427.

7.4 measurement of the curvature of the test, the wound and fracture are produced on two rods, chosen from the party. Two beams taken from the party, taken by one rod.

The selection of samples for testing tensile, bending, hardness, grain size and chemical composition is produced from two rods, chosen from the party. Two beams taken from the party, taken by one rod. From each of the two bars take one sample for each test.

7.5 the curvature of the bars test in the following manner: the rod is placed on the plate. To check the rods make a rigid straightedge according to GOST 8026 1 meter and metallic measuring ruler according to GOST 427 or pattern to measure the maximum distance between the line and rod.

Allowed to use other measuring tools, not inferior to the accuracy specified in the standard.

7.6 tensile Test is carried out according to GOST 1497. The selection and preparation of samples for tensile tests carried out according to GOST 24047.

Allowed for rods with cross-sectional area greater than 80 mmto produce samples with a diameter of 6 mm and 8 mm from the Central part of the rod.

7.7 to check For metal in the kink bars incised with one or both sides, and then break.

The incision should be made in such a way that the fracture passed through the Central part of the rod. The ends of the rods subjected to the control fracture cut. Examination of the fracture produced without the use of magnifying devices.

7.8 Hardness measured on the face surface of the rod. The hardness measurement Brinell hardness is carried out according to GOST 9012, hardness by Vickers — GOST 2999.

7.9 For bending test, selected samples with a length of (150±25) mm each. Samples of solid rods of diameter 5 to 10 mm bend in Portocolom, and with a diameter of over 10 mm will be turned eccentric to the diameter of 10 mm, leaving one side portocannone.

When bending the sample neophocaena the surface must be exterior. Hard drawn bars shall withstand a bending at 90 degrees around a mandrel with a radius of curvature equal to twice the diameter of the rod.

The bend test is carried out according to GOST 14019.

7.10 Test winding is performed by winding 10 turns onto a cylindrical mandrel, the diameter of which should be equal to twice the diameter of the rod.

The inspection of the surface of bars after the bending test, and the winding is produced without the use of magnifying devices.

7.11 determination of the grain is carried out according to GOST and GOST 21073.0 21073.3. Samples for the determination of grain size taken along the direction of deformation.

7.12 Chemical composition is determined by GOST 20068.1 — 20068.3 GOST, GOST 15027.1 -15027.3 GOST, GOST 15027.5 — GOST 15027.7 or other methods of equal accuracy specified in the standard.

If there is disagreement in assessing the quality of the chemical composition of bars is determined according to GOST 25086, 15027.1 GOST — GOST 15027.20, 20068.1 GOST — GOST 20068.4.

The selection and preparation of samples for chemical analysis is carried out according to GOST 24231.

7.13 in case of disagreement in assessing the quality of bars the consumer and the manufacturer are guided by the requirements established by this standard.

7.14 allowed the manufacturer to use other testing methods, providing the required accuracy set out in this standard.

8 Marking, packaging, transportation and storage

8.1 Bars with a diameter up to 35 mm inclusive tied into bundles weighing not more than 80 kg each. Each bundle should consist of at least three bars and should be tied with wire in two turns with a diameter of 1.2 mm according to GOST 3282 or other material according to normative-technical documentation in at least two places, and the bar length more than 3 m not less than three places so as to exclude the mutual displacement of the bars in the beam.

The ends of the wire connected by twisting at least five turns.

Allowed a bunch of bundles with packing tape with a diameter of at least 0.330 churchyard 3560.

Drawn rods with diameter up to 12 mm inclusive are Packed into 1−2 layers of synthetic non-woven materials, ensure quality safety bars, according to normative-technical documentation and bandage over the packing material wire diameter not less than 1.2 mm according to GOST 3282 in at least two places.

By agreement between manufacturer and consumer with mechanized loading and unloading is allowed the weight of the beams more than 80 kg.

8.2 Consolidation packages in overpacks carried out in accordance with the requirements of GOST 26663.

Dimensions of packages — according to GOST 24597.

Packaging bundles and individual rods, not bound in bundles, carried on pallets according to GOST 9557 or without pallets with the use of bars not less than 50 mm with tying wire with diameter at least 2 mm in two turns according to GOST 3282 or tape sizes not less than 0.3to 30 mm according to GOST 3560, or using a sling also packageable wire according to GOST 3282 diameter not less than 5 mm with the twist of not less than three turns. The ends of the wire connected by twisting at least five turns, the ends of the ribbon to the castle.

Packaging of bars designed for the far North and equivalent areas, shall be conducted in accordance with the requirements of GOST 15846.

8.3 each beam rods should be attached to the metal, cardboard or plywood label according to GOST 14192, which specify:

is the trademark or name and trademark of manufacturer;

— the name of the country of manufacture;

— the symbol bars;

— the batch number;

— the designation of this standard;

— the stamp of the technical control room or controller.

At the end of the rods should be stamped:

a) for bars with diameter 25−35 mm

— grade alloy;

b) for rods with a diameter of over 35 mm:

— grade alloy;

— the batch number;

— stamp of technical control.

These data allowed to put permanent paint on the side surface of the rod.

8.4 Transport of bars is carried out by all kinds of transport in covered vehicles in accordance with cargo carriage regulations applicable to transport of this species.

Allowed bars associated into bundles weighing not more than 80 kg, transported in standardized containers according to the GOST 20435 or in specialized containers according to normative-technical documentation.

8.5 Transport marking of packages — according to GOST 14192 with the additional application of manipulation sign «Protect from moisture» and the label batch number in the free from traffic markings.

Transport marking applied by any method stipulated by GOST 14192.

8.6 When stored in covered facilities and during transportation of the bars should be protected from mechanical damage, moisture and active chemical substances.

8.7 subject to these conditions of transportation and storage of consumer properties of bars do not change.

Annex a (informative). Theoretical weight of 1 m of rods of beryllium bronze

Appendix A
(reference)

A. 1 Theoretical weight of bars are given in table A. 1.


Table A. 1

Annex B (reference). The heat treatment of the samples made from beryllium bronze

Appendix B
(reference)

1. Heating to (780±10) °C, holding at temperature for 10−20 minutes, instant cooling in water.

2. Dispersion hardening (aging) at (315±5) °C, exposure at this temperature for 2−3.5 hours.

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UDC 669.35.5.422:006.354 ISS 77.150.30 W55

Keywords: bars, nominal diameter, grade, chemical composition, torsion, curvature, mechanical properties
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