GOST 10006-80

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  ГОСТ 10006-80

GOST 10006−80 (ISO 6892−84) of the Pipe metal. Method of tensile test (with Amendments No. 1, 2, 3, 4)

GOST 10006−80
(ISO 6892−84)

Group В69

INTERSTATE STANDARD

PIPE METAL

Test method tensile

Metal tubes. Tensile test method

ISS 23.040.10
77.040.10
AXTU 1309

Date of introduction 1980−07−01

INFORMATION DATA

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

2. APPROVED AND promulgated by the Decree of the State Committee of standards of Ministerial Council of the USSR from 31.03.80 N 1464

3. The standard fully complies with ISO 6892−84* part of the test tubes (in essence the method, condition testing, processing results)
________________
* Access to international and foreign documents can be obtained by clicking on the link, here and hereafter. — Note the manufacturer’s database.

4. REPLACE GOST 10006−73

5. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

6. Limitation of actions taken by Protocol No. 7−95 Interstate Council for standardization, Metrology and certification (ICS 11−95)

7. EDITION (September, 2010) with Changes No. 1, 2, 3, 4, approved in December 1985, July 1987, October 1989, December 1990 (IUS 4−86, 12−87, 2−90, 5−91)


This standard establishes the method of static tensile testing of metallic seamless, welded, bimetallic tubes for the determination of temperature (20) °With the following characteristics:

— yield point (physical);

— yield strength (conditional);

— temporary resistance;

— the elongation after rupture;

the relative constriction after rupture.

Terms and definitions — according to GOST 1497.

The standard does not apply to the testing of welded joints and weld metal.

Standard corresponds to ISO 6892−84 in terms of tensile testing of metallic tubes (in essence the method, condition testing, processing of results).

(Changed edition, Rev. N 3, 4).

1. SAMPLING METHODS

1.1. For testing of tubes in tension applied to the longitudinal and transverse samples. The orientation of the longitudinal axis of the sample point in the normative-technical documentation (NTD) on the tube.

1.2. Longitudinal samples are made as specified in PP.1.2.1−1.2.3.

1.2.1. In a segment of pipe of total cross section without restriction of the outer diameter (Appendix 1, hell.1).

1.2.2. In the form of a strip for pipes with wall thickness up to 12 mm, cut along the axis of the tube (segment), with the width of the working part specified in the table.1.

Table 1

mm

Longitudinal samples in the form of strips can be manufactured without heads (Annex 2, hell.1) and heads (Annex 2, hell.2).

(Changed edition, Rev. N 1, 3).

1.2.3. In the form of cylindrical samples of type III GOST 1497.

Cylindrical specimens are made of pipes with a wall thickness of 5 mm or more.

The diameter of the working part of the cylindrical sample is set equal to:

5,0; 8,0; 10,0 mm with a nominal wall thickness, respectively, over 7.0 to 10.0 mm, inclusive over 10.0 to 14.0 mm inclusive, in excess of 14.0 mm.

Note. By agreement with the consumer allowed the production of samples with a diameter of 3 mm at a wall thickness from 5,0 to 7,0 mm inclusive.

1.2.3. By agreement with the consumer allowed to test cylindrical samples of type II or III according to GOST 1497.

(Added, Rev. N 2).

1.3. For tests of bimetallic tubes with wall thickness up to 12.0 mm inclusive are used the samples with the preservation of plating: in a segment of pipe of total cross section or segment of samples according to claim 1.2.2.

When testing bimetallic tubes with a wall thickness of more than 12.0 mm cylindrical specimens made from the base layer.

1.3.1. Longitudinal cylindrical samples and samples in the form of stripes of welded pipes are made from samples (blanks) cut from the base metal away from the weld, ensuring the absence of thermal influence of welding.

(Changed edition, Rev. N 3).

1.3.2. When testing shaped tubes with planar faces or sections of a cylindrical surface, it is possible to produce longitudinal strips of a width of the working part is not less than 8 mm.

1.4. The type of applied sample is specified in the normative-technical documentation on the pipe. In the absence of instructions in the form of a sample set by the manufacturer.

In cases of disagreement in assessing the quality of steel the results of tests of longitudinal specimens in the form of strips (Appendix 2, hell.1) use samples in the form of a segment with the heads (Annex 2, hell.2).

1.5. The initial gauge length of the samples according to GOST 1497.

When receiving the calculated length less than 20 mm in the samples taken from capillary or thin-walled pipes, it is taken equal to 20 mm.

1.6. Maximum deviations in width of the working part of the longitudinal samples in the form of stripes in their manufacture shall be as specified in table.2.

Table 2

mm

Note. When testing high-strength steels, it is recommended to use a tolerance on the width of the specimen to create a thinning in the middle of a billing part.


Head shape and size transition of the samples can vary depending on the machine design.

1.7. Longitudinal samples in the form of strips and pipe sections must maintain the surface layers untouched. Burrs on the edges of the samples should be removed easy zapilovku.

(Changed edition, Rev. N 3).

1.8. Transverse samples are made of cylindrical proportional cut of the pipe body, perpendicular to its longitudinal axis, with the dimensions listed in table.3.

(Changed edition, Rev. N 3, 4).

1.9. Tubes of an external diameter of 426 mm and over are allowed to test according to GOST 1497 on cylindrical and flat specimens. Allowed to edit the static load of the working and gripping part of the cross-sample.

(Changed edition, Rev. N 3).

1.10. When testing samples in the form of a strip is allowed to straighten the ends, hold the grips of the machine. Straightening the ends is carried out outside of the working length of the specimen.

1.11. Measurement of samples is carried out prior to testing as specified in PP.1.11.1−1.11.4.

1.11.1. Samples in the form of pieces of pipe. The outer diameter measure in two mutually perpendicular directions; in three places; at the edges and in the middle of the working part.

Table 3

mm

Notes:

1. On the heads of the cylindrical longitudinal and transverse samples allowed flat areas, due to the form of tubes.

2. By agreement with the consumer it is allowed manufacture of cylindrical specimens, which differs from the diameter of the working part are shown in table.3, other values of outer diameter and wall thickness pipes.


The lowest arithmetic mean value of the three pairs of measurements recorded in the test report.

The measurements were carried out with the utmost accuracy to 0.05 mm for pipe diameter up to 20 mm and with maximum accuracy up to 0.1 mm at the pipe diameter more than 20 mm.

Wall thickness is measured at a distance of not less than 10 mm from the end in four locations in two mutually perpendicular directions. The rate is measured with accuracy up to 0.01 mm. In the test will wear the arithmetic average of the four measurements.

(Changed edition, Rev. N 4).

1.11.2. Samples in the form of segments. Width and thickness are measured in at least three places (in the middle and at the edges of the working part of the specimen). For the initial cross-sectional area taking the lesser of the received values on the basis of the measurements.

Measurement of the width of the boundary samples in the form of strips is carried out with utmost accuracy to 0.05 mm, and thickness — up to 0.01 mm.

(Changed edition, Rev. N 3, 4).

1.11.3. For pipes of outer diameter to 10.0 mm inclusive allowed the definition of the cross sectional area (a) for nominal dimensions of diameter and wall thickness.

In this case, the test Protocol is written: «determined by the denomination».

1.11.4. Cylindrical samples is measured according to GOST 1497. Rounding the calculated cross sectional area of tubes or samples is carried out in accordance with the table.4.

(Changed edition, Rev. N 1).

1.12. The initial gauge length of the samples installed with an accuracy of 1% of its value and is limited to shallow punching or other ways, providing the necessary accuracy and do not cause destruction on a road marking lines.

The initial calculated length is rounded up to the nearest multiple of 5 or 10.

Table 4

mm

For the possibility of conversion of elongation, with such open by the middle of the layout of the samples is carried out along the entire length of the working part.

The measurement of specimens after test carried out with the utmost accuracy to 0.1 mm.

(Changed edition, Rev. N 1, 4).

1.13. Working length of samples must be equal:

— for pipes — ;

— for the longitudinal samples in the form of strips with thickness less than 3 mm from before ;

— for the longitudinal samples in the form of strips with thickness of 3.0 mm and more — from to ;

— for cylindrical specimens — from to . Arbitration test should be highest in these intervals.

The samples with thickness less than 2 mm and the samples of the metals with increased fragility of fission applied by any method (knurled, dye, pencil and punching on the transitional parts of the samples), not causing the destruction of the marking lines.

(Changed edition, Rev. N 3, 4).

2. EQUIPMENT

As the testing machines used tensile and universal testing machines of all systems that meet the requirements of this standard and GOST 28840.

When testing must be complied with the following conditions:

a reliable centering of the specimen in the grips of the testing machine;

— smooth increase of load when loading the sample;

— the system of «machine-sample» must-have characteristics of elastic compliance To, which is taken into account when choosing the speed of loading of the sample.

For measuring wall thickness of tubes with an internal diameter of less than 10 mm is used stenkomer indicator — according to GOST 11358.

(Changed edition, Rev. N 1, 3).

3. TESTING

3.1. The speed test samples in determining the physical , upper , lower , conditional limits of fluidity and strength  — according to GOST 1497.

(Changed edition, Rev. N 4).

3.1.1. (Deleted, Rev. N 4).

3.1.2. The yield strength conditional with the tolerance on value of plastic deformation during loading (or some established tolerance) determined by the diagram obtained on the testing machine or without the construction of the chart of stretching with the help of special devices (microprocessors, etc.).

The scale of the graph along the axis of elongation must be at least 50:1. Use the chart with the scale on the axis of elongation of at least 10:1.

(Changed edition, Rev. N 4).

3.1.3. When determining the strength speed the stretching should be not more than 0.4 from the calculated length of the sample, expressed in mm/min.

(Changed edition, Rev. N 1).

3.1.4. Allowed to conduct tests at speeds regulated in the NTD on the tube.

3.2. When testing samples in the form of pieces of pipe of total cross-section of the ends of the specimens captured clips of cars, tightly closed cylindrical or with a taper angle of 1° metal tubes (Appendix 1, hell.2). In case of disagreements arising in the evaluation of the quality of pipes according to test results of mechanical properties, using only the cylindrical tube.

Allowed testing of round and profile tubes for the samples with tapered ends (Annex 1, hell.3).

In test and acceptance tests are supposed to apply tube length less than the height of the grip of the testing machine.

(Changed edition, Rev. N 1).

3.3. Testing of flat and cylindrical samples is carried out according to GOST 1497.

3.3.1. The testing result is accepted, the mechanical properties obtained from testing each sample. The number of test samples specified in the NTD on the tube.

3.4. The results of the tests are recorded in the cases specified in paragraphs.3.4.1−3.4.3.

3.4.1. At break of a sample with dots marking drilling position or beyond the estimated length at break of the specimen in the clamps of the testing machine or manufacturing defects (rassai, captivity, gas shells etc.), if any mechanical feature its size does not meet the requirements.

3.4.2. In the formation of two or more pins and two or more of the tear.

3.4.3. When you break the pipe cut in a spiral, if the calculated length of the sample is formed two or more of the spiral loop.

(Changed edition, Rev. N 3).

3.5. In these cases, the tensile test is repeated on samples selected from the same melting or party.

The number of samples for re-testing must match the number of invalid tests.

4. PROCESSING OF THE RESULTS

4.1. The cross-sectional area of the sample in a segment of pipe , mm, is calculated by the formula

.

4.2. The cross-sectional area of the sample in the form of a strip segment of the cross section , mm, is calculated by the formula

,

where

.

Values depending on the width of the specimen given in the mandatory annexes 6 and 7.

4.3. The cross-sectional area of the cylindrical sample in mm, calculated by the formula

.

(Changed edition, Rev. N 1).

4.4. The cross-sectional area profile of the pipe is determined by the gravimetric method, if other method is not specified in the reference document on the pipe.

For profile tubes with a perimeter of up to 60 mm allowed the definition of the cross sectional area of «nominal sizes».

4.5. Gravimetric method the cross-sectional area , in mm, calculated by the formula

,

where is the mass of sample, g;

 — density, g/cm;

 — length of sample, mm.

(Changed edition, Rev. N 3).

4.6. The measurement of specimens after test and calculation results are produced according to GOST 1497.

4.6.1. Determination of the relative narrowing is performed only on cylindrical samples.

4.6.2. When determining the longitudinal elongation of the samples in the form of strips and lengths of pipe from bimetallic tubes measurement of the final estimated length is carried out on the outer layer.

4.6.1, 4.6.2. (Changed edition, Rev. N 3).

4.7. The source data and test results are recorded in the Protocol. Form of the Protocol given in the reference in Appendix 8.

Annex 1 (recommended)

ANNEX 1
Recommended

Damn.1

Damn.2

Damn.3

APPENDIX 1. (Changed edition, Rev. N 1, 3, 4).

ANNEX 2 (mandatory)

ANNEX 2*
Mandatory

________________
* APPENDIX 3. (Deleted, Rev. N 4).

ANNEXES 4, 5. (Deleted, Rev. N 1).

________________
* Dimensions are provided in the manufacture of: setting the workpiece and adjustment of the cutting tool.

Damn.1

________________
* Dimensions are provided in the manufacture of: setting the workpiece and adjustment of the cutting tool.

Damn.2

APPENDIX 2. (Changed edition, Rev. N 1).

APPENDIX 6 (mandatory). The value of the coefficient n when the width of the sample b (0)=10 mm

APPENDIX 6
Mandatory

The value of the coefficient when the width of the sample =10 mm

ANNEX 6. (Changed edition, Rev. N 1).

ANNEX 7 (obligatory). The value of the coefficient n when the width of the sample b (0)=8 mm

ANNEX 7
Mandatory

The value of the coefficient when the width of the sample = 8.0 mm

ANNEX 8 (informative). An exemplary form of test tube samples

ANNEX 8
Reference

PROTOCOL N

burst tests of pipe samples __________ by car _____________

APPENDIX 8. (Changed edition, Rev. N 1).



The electronic text of the document
prepared by JSC «Code» and checked by:
the official publication of the

Pipes of metal and connecting
parts to them. Part 4. Pipe black
metals and alloys, cast
fittings to them. Main
dimensions. Methods technological
test pipes: Sat. Standards. -
M.: STANDARTINFORM, 2010