GOST 24301-93

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  ГОСТ 24301-93

GOST 24301−93 Rods and tubes of bronze and brass alloy. Specifications

GOST 24301−93

Group W55

INTERSTATE STANDARD

BARS AND PIPES
BRONZE AND BRASS CAST

Specifications

Bronze and brass cast bars and tubes.
Specifications

OKS 77.140.90*
GST 17 3000
_____________________
* In the Index «national standards» 2003 specified
codes AUX 23.040.15 and 77.150.30. — Note the CODE.

Date of introduction 1997−01−01

Preface

1 DEVELOPED by the Donetsk state Institute of non-ferrous metals

SUBMITTED to the State Committee of Ukraine for standardization, Metrology and certification

2 ADOPTED by the Interstate Council for standardization, Metrology and certification on February 17, 1993 (Protocol No. 3 MGS)

The adoption voted:

3 Decree of the Russian Federation Committee on standardization, Metrology and certification dated June 19, 1996, 404 N interstate standard GOST 24301−93 introduced as the national standard of the Russian Federation from January 1, 1997

4 REPLACE GOST 24301−80

INFORMATION DATA

REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

This standard applies to bars and circular tubes of bronze and brass, manufactured by horizontal casting and used for the needs of the economy and exports.

Requirements 2.3 are recommended. The remaining requirements of this standard are mandatory.

1. ASSORTMENT

1.1. Rods and tubes are made of following grades of alloys LC40S, Бр03Ц7С5Н1, Бр03Ц12С5, Бр05Ц5С57.

1.2. The outer diameters of rods and pipes and thickness of pipes shall be as specified in table 1.

Table 1

By agreement with the consumer allowed the production of rods and tubes of other diameters.

Theoretical weight of 1 m of rods and pipes is given in Appendix A.

1.3. Rods and tubes shall be manufactured with a length divisible by 400 mm but not exceeding 2000 mm.

Examples of symbols

rod in bronze brand Бр05Ц5С5 with a diameter of 40 mm, length 800 mm, second group:

Rod Бр05Ц5С5 40х800−2, GOST 24301−93;

pipe brass grade LC40S an outer diameter of 60 mm, a wall thickness of 16 mm, a length of 400 mm, the first group:

Pipe LC40S 60х16х400−1, GOST 24301−93

2. TECHNICAL REQUIREMENTS

2.1. Rods and tubes must be manufactured in accordance with the requirements of this standard technological instruction, duly approved, from alloys with the chemical composition according to GOST 613 — bronze and GOST 17711 — brass.

2.2. The metal section bars and tubes must be thick, does not contain extraneous inclusions and gas shells.

2.3. The surface of rods and pipes must be free of cracks, cavities and nonmetallic inclusions. Permitted surface defects provided that they do not extend in depth more than half the difference of the measured diameter and the minimum.

Allowed scallops formed because of the development of molds and mandrels, if they do not control the turning of output dimensions of the workpiece for tolerances for inner and outer diameter.

2.4. Tolerance ovality of rods and tolerances ovality and concentricity of the pipes should take their dimensions limit deviations for outer diameter and wall thickness.

2.5. Mechanical properties of rod and pipe shall be as specified in table 2.

Table 2

2.6. Limit deviation of the outer diameters of bars and tubes shall be as specified in table 3.


Table 3

2.7. Limit deviation of wall thickness of pipes shall be as specified in table 4.


Table 4

2.8. Limit deviations in length (from 800 to 2000 mm) should not exceed ±15 mm for rods and tubes of the first group of ±20 mm of the second group and the curvature of 1 m length — value, mm:

3 for rods and tubes of bronze;

10, for rods and tubes of brass.

2.9. Bars and pipes with specific requirements for mechanical properties and limit deviations of dimensions are made by agreement between manufacturer and consumer.

3. ACCEPTANCE RULES

3.1. Bars and pipes take parties. The party must consist of rods and tubes of the same brand of alloy, one size shall be furnished in one document about quality that contains:

trademark or the name and trademark of manufacturer;

the symbol bars or tubes;

batch number;

the weight of the batch;

grade;

the size and number of bars or tubes;

the results of mechanical tests and chemical analysis (by customer request);

the designation of this standard.

3.2. For testing of mechanical properties and control the chemical composition of the selected at least two bars or tubes from the party.

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

3.3. Quality control external and internal surfaces and the quality of the metal section is subjected to each prefabricated (rod, pipe).

3.4. To control the size of the party take 5% of the bars or tubes.

3.5. If unsatisfactory test results of at least one indicator thereon, a second test of the doubled sample taken from the same batch, the results of repeated tests spread to the entire party.

4. CONTROL METHODS

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

Determination of the chemical composition — GOST 25086, 1953.1 GOST — GOST 1953.16 or other methods of equal accuracy standard.

If there is disagreement in the assessment of the chemical composition chemical composition is determined by GOST 25086, 1953.1 GOST — GOST 1953.16.

4.2. Sampling for tests of tensile — according to GOST 24047. Test tensile — according to GOST 1497. Test for hardness is according to GOST 9012.

4.3. Quality control surface rods and tubes and of the metal section must be conducted visually without the use of magnifying devices.

The height of scallops measured by changereason according to GOST 164.

4.4. Control of diameters of bars and tubes, their limit deviations, and the thickness of the pipe wall should be performed by a caliper according to GOST 166.

The curvature control should be carried out by changereason according to GOST 164.

Controlling the length of the rod and pipe is carried out metal measuring tape according to GOST 7502 or ruler according to GOST 427.

5. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

5.1. At the ends or side surfaces of rods and pipes shall bear:

the room melt;

trademark of the manufacturer;

color coded according to GOST and GOST 614 1020 for the relevant chemical composition of alloy grades.

5.2. Bars and pipes transporterowych formed in bags according to normative-technical documentation.

5.3. Products are sent to the far North regions and equivalent areas shall be Packed according to GOST 15846.

5.4. Transport marking under GOST 14192.

5.5. Transportation is carried out by all types of transport in accordance with goods transportation regulations applied to this type of transport.

5.6. When transporting and storing rods and pipes must be protected from mechanical damage and action of active chemical substances.

Annex a (informative)

Table A. 1

The text of the document is verified by:
the official publication of the
M.: IPK Publishing house of standards, 1996