GOST 7564-97

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  ГОСТ 7564-97

GOST 7564−97 hire. General rules of sample, blanks collection for mechanical and technological tests

GOST 7564−97

Group B09

INTERSTATE STANDARD
RENTAL
General rules of sample, blanks collection for mechanical and technological tests
Rolled products. General rules of sampling, rough specimens and test pieces selection for mechanical and technological testing

ISS 77.040
AXTU 0908

Date of introduction 1999−01−01

Preface

1 DEVELOPED by the Russian Federation, the Interstate technical Committee for standardization MTK 120 «Cast iron, steel, rolled"

INTRODUCED by Gosstandart of Russia

2 ADOPTED by the Interstate Council for standardization, Metrology and certification (minutes No. 12 dated November 21, 1997)

The adoption voted:

3 Standard complies with international standard ISO 377−1-89 „the Selection and preparation of samples and specimens of steel, pressure treated. Part 1. Samples and specimens for mechanical testing“ in terms of sampling and sample preparation for mechanical testing

4 Resolution of the State Committee of the Russian Federation for standardization, Metrology and certification dated April 13, 1998 N 118 inter-state standard GOST 7564−97 introduced directly as state standard of the Russian Federation from January 1, 1999

5 REPLACE GOST 7564−73

6 EDITION (September 2009) — amended (ICS 3−2002)

1 SCOPE

This standard establishes General rules of sampling, blanks and samples for tensile tests, impact bending, upsetting, cold bending from the varietal, shapes, sheet and broadband rolled.

2 NORMATIVE REFERENCES

The present standard features references to the following standards:

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

GOST 7268−82 Steel. The method of determining the propensity to mechanical aging test the impact strength

GOST 8817−82 Metals. Test method for sediment

GOST 9454−78 Metals. Test method for impact strength at low, room and elevated temperatures

GOST 9651−84 (ISO 783−89) Metals. Methods of tensile tests at elevated temperatures

GOST 11701−84 Metals. Methods tensile tests of thin sheets and strips

GOST 14019−2003 (ISO 7438:1985) Materials of metal. Method of bend test

3 TERMS AND DEFINITIONS

3.1 Unit rental — product selected from the party with the aim of cutting samples for test specimen production.

3.2 the Sample — part products designed for casting test specimens.

In some cases, the breakdown itself can be the unit of hire.

3.3 Harvesting, part of the sample, treated or untreated mechanically, subjected, if necessary, heat treatment for the manufacture of test specimens.

3.4 Samples for testing, part of the sample or workpiece to a certain size, treated or untreated mechanically and brought to the state required for a particular test.

In some cases, the sample can be a sample or workpiece.

3.5 Control condition — the condition in which a sample, workpiece or sample to be tested may be subjected to a heat treatment and (or) machining and distinguished from the state of delivery.

In such cases, a sample, a preset or a sample for testing is called control sample, control or blank control sample.

3.6 Equivalent terms in English, French and German are given in Appendix A.

4 GENERAL REQUIREMENTS FOR SAMPLING, BLANKS AND SAMPLES

4.1 Samples, blanks and samples for testing taken in accordance with the requirements of annexes B, C and D, should characterize the type of rental. Requirements for sampling, blanks and samples may be specified in other regulations for hire.

4.2 Identification of samples, blanks and samples

Samples, blanks and samples for testing should be marked. If in the process of making samples, blanks and (or) sample is impossible to avoid the deletion of the marking transfer marking perform until it is removed.

4.3 Number of samples and samples selected for testing should be established in the normative document for hire.

4.4 sampling and blanks must be provided with conditions that protect samples from the effects of heating and hardening.

Allowances from the cut line to the edge of the prepared sample must conform to table 1.


Table 1 — Allowances from the cut line to the edge of the finished sample

(Amendment).

5 SELECTION AND PREPARATION OF SAMPLES AND BLANKS. THE SELECTION LOCATION AND ORIENTATION OF SAMPLES FOR MECHANICAL TESTING

5.1 Location selection and the size of the sample

A sample taken so that the selection location and orientation of test specimen taken from her, in relation to the product comply with the requirements of the standard rent or, in his absence, the requirements of Annex V.

In the event of a dispute between the manufacturer and the consumer samples are taken from the end rolled in the distance, is given in Appendix G, if the instrument hire not specified otherwise.

The size of the sample should be sufficient for the sampling required for a particular test.

If necessary, there should be enough material for re-testing.

5.2 Location selection, size, and orientation of samples for testing

Place of sampling (sampling) and, if necessary, the dimensions of the samples, the orientation of the sample in the rolling direction (length and breadth) must be specified in the normative document for hire.

In the absence of such requirements use the directions mentioned in Annex B.

Note — With the aim of reducing losses of metal due to the established practice standard for the rental, if it is acceptable from a technical point of view, to regulate the possibility of using transverse specimens is longitudinal (reforged samples) to check the values for the longitudinal samples.


The sample for testing the impact strength to the longitudinal axis of the incision should be perpendicular to the direction of rolling.

5.3 Sampling and sample preparation

5.3.1 the instrument rental should be made clear whether the test to determine the properties in the delivery condition (5.3.2) or in the control condition (5.3.3).

5.3.2 Test in the state of delivery

If the instrument hire not otherwise specified, the sample shall be selected from rolled, past all stages of plastic and (or) heat treatment, which should be subjected to a rental before delivery.

If the sample cannot remain attached to the unit of hire to end of production (e.g., leaves, cut before annealing, samples for tests were taken from scrap produced when cutting), regulatory instruments on hire must determine the stage of sampling from the unit rental. Processing modes which then exposed the sample should be similar to the processing modes of the hire. In particular, the heat treatment should be carried out in the same modes, which handled the rental and, if possible, at the same time.

The sampling should be such as not to change the characteristics of that part of the sample from which to produce samples.

If necessary, edit the sample to retrieve from the quality of samples, the edit should be in cold condition, unless otherwise specified. Edit is not considered a mechanical processing (5.3.3.2), if it does not cause strain hardening that can change the mechanical properties of rolled products.

Note — After editing cold blanks for samples may require heat treatment. In this case, the heat treatment should be determined by agreement between manufacturer and consumer. In exceptional cases, when an edit causes a significant change in the shape of the sample, method of sample preparation should be established by agreement between manufacturer and consumer.


The sample should not be subjected to any other mechanical or heat treatment.

5.3.3 Testing in the control condition

5.3.3.1 Sample

The sample shall be selected from the product at the manufacturing stage, determined by the normative document for hire.

Sampling can be performed by any method, provided that it does not entail a change in the metal.

If the selection process entails changes in the metal, then the sample must be a sufficient amount of metal to exclude this effect in the manufacture of the samples. Before any heat treatment, if necessary, should be edit in hot or cold condition.

5.3.3.2 Blank (sample), if necessary, is subjected to:

a) processing pressure, while the normative documents for the hire must determine the terms of any forming (e.g., forging, rolling), which shall be subjected to test, and specify, in particular, the initial and final dimensions of the samples;

b) pre-grinding before heat treatment.

If the sample needs to be reduced for the heat treatment, standard rental, you should determine the size to which should be reduced test. If necessary, standard rental, you should also specify a method of reduction of the samples;

C) heat treatment in an environment with guaranteed temperature stability of the measured device, which has passed the metrological certification.

A heat treatment process must meet the requirements of the normative document for metal.

The workpiece must not be given heat treatment more than once, except for holiday, which can be repeated in a predetermined temperature range. For any repeated tests should be selected the new billet.

For steel with tensile strength 1270 N/mm(130 kgf/mm) and over heat treated is subjected to the samples made with allowance for grinding.

5.4 the Selection and preparation of samples for testing of mechanical properties

5.4.1 Cutting and machining

Fillet samples should be performed in a cold way and with precaution, to avoid surface hardening and overheating of hire, which can change its mechanical properties.

The traces left by a tool after machining, which could affect the results of the test must be repaired by grinding (with abundant coolant supply) or polishing, provided that the selected method of surface finishing remains the size and shape of the sample within the limits, regulated by the standard for the relevant test.

5.4.2 Shape, dimensions and tolerances size of samples should correspond to GOST 1497, GOST 7268, GOST 9454, GOST 9651 and GOST 11701.

5.4.3 For tensile tests of long products round, square and hexagonal profiles of cylindrical samples.

5.4.4 For tensile testing of strip and sheet products with thickness up to 25 mm inclusive use flat specimens over 25 mm cylindrical samples. Test products with thickness from 7 to 25 mm can be performed both on flat and cylindrical samples. In the document of quality which indicate the type of sample.

5.4.5 testing of structural shapes with thickness up to 25 mm inclusive use flat samples, preserving them the surface layers of steel, and when non-parallel sides of the flange — preserving surface layers of rolled on one side; with plate thickness of 25 mm, allowed processing of a flat sample to a thickness of 25 mm to the one side sample surface rental or manufacture of cylindrical specimens.

Note — thickness of shelf: shaped from 7 to 25 mm the test can be conducted on a flat and cylindrical samples.

5.4.6 rolled round, square and hexagonal profile for which the selection of blanks and samples produced in embodiment 1, a diameter or a side of a square to 25 mm, flat products with thickness up to 25 mm and a width up to 50 mm, shaped profiles with a flange width up to 4 mm may be tested tensile samples, not machined.

5.4.7 For testing the impact strength of rolled diameter up to 16 mm inclusive, a square with a side of a square to 10 mm inclusive and strip and sheet products with thickness up to 10 mm inclusive are used samples with size 5х10х55 mm, for rental of a diameter exceeding 16 mm and of a thickness exceeding 10 mm — specimen sizes 10x10x55 mm.

5.4.8 Samples for testing the impact strength from sections cut out so that one of the side edges coincide with the surface of rolled products. The axis of the incision should be perpendicular to the surface of rolled products.

5.4.9 In the case of the thermal treatment of samples the requirements should be the same as for the blanks (5.3.3.2, subparagraph b).

6 SAMPLING AND PREPARATION OF SAMPLES FOR TESTING ON SEDIMENT

6.1 Samples for tests on sediment taken from either end of the rod or strip. For products delivered in coils, sample taken at a minimum distance of 1.5 m from the end of a coil weight up to 250 kg and not less than 3,0 m at a mass skein over 250 kg.

6.2 test Conditions, the surface condition of the samples and evaluation of results shall comply with the requirements of GOST 8817.

7 SAMPLING AND PREPARATION OF SAMPLES FOR BEND TEST IN COLD STATE

7.1 Place the fillet samples in relation to the direction of rolling and the length of the rental, in accordance with Annex B.

7.2 When sampling and blanks must be provided with conditions that protect samples from the effects of heating and hardening outlined in 4.4 of this standard.

7.3 the Minimum distance from the end of products for sampling or samples for testing in the event of a dispute in accordance with Annex G.

7.4 the Scheme of sampling for testing for cold bending in accordance with Annex D.

7.5 Methods of sampling, types of samples and other test requirements for cold bending shall meet the requirements of GOST 14019.

Annex a (informative). EQUIVALENT TERMS DEFINED IN SECTION 3, IN ENGLISH, FRENCH AND GERMAN

APPENDIX A
(reference)

Table A. 1 — Equivalent terms

Figure A. 1

APPENDIX B (recommended). PLACE CUTTINGS SAMPLES, BLANKS AND SAMPLES IN RELATION TO THE DIRECTION OF ROLLING AND THE LENGTH OF THE RENTAL

APPENDIX B
(recommended)

Table B. 1 — Place the cuttings samples, blanks and samples

ANNEX b (recommended). SCHEME OF SELECTION OF BILLET SAMPLES FOR THE DETERMINATION OF MECHANICAL PROPERTIES OF ROLLED

THE APP
(recommended)

B. 1 Scheme of selection of billet samples for determining the mechanical properties of the rolled state of delivery (option 1)

B. 1.1 the Selection of workpieces made from samples of rolled products

Hire of round and polygonal cross-sections

Figure B. 1 — Scheme of selection of billet samples from rolled round and polygonal cross-sections

______________
* Allowed the selection of up to 01.01.2001.

Figure B. 1 — Scheme of selection of billet samples from rolled round and polygonal cross-sections


Hire square and rectangular sections

Figure B. 2 — Scheme of selection of billet samples from rolled square and rectangular sections

______________
* Allowed the selection of up to 01.01.2001.

Figure B. 2 — Scheme of selection of billet samples from rolled square and rectangular sections


Band with beveled edges

Figure B. 3 — Scheme of selection of billet samples from the strip with beveled edges

Figure B. 3 — Scheme of selection of billet samples from the strip with beveled edges

(Amendment).

B. 1.2 Selection of billet samples from sections*
_____________
* Angle corners of the blank are cut from the larger shelves.

Figure B. 4 — Scheme of selection of billet samples from sections

Figure B. 4 — Scheme of selection of billet samples from sections

B. 1.3 Sampling from the sheet and broadband rolled

Figure B. 5 — Scheme of sampling from the sheet and broadband rolled

 — the width of the rental; and the place of sampling

Figure B. 5 — Scheme of sampling from the sheet and broadband rolled

Table B. 1 — Position of the sample relative to the surface of the rental

B. 2 Scheme of selection of billet samples for the determination of mechanical properties of rolled steel in improving the delivery condition (normalized or improved) or in the control condition (option 2)

B. 2.1 the Selection of workpieces made from samples of rolled products

Hire of round and polygonal cross-sections

Figure B. 6 — Schematic of selection of billet samples from rolled round and polygonal cross-sections

Figure B. 6 — Schematic of selection of billet samples from rolled round and polygonal cross-sections


Hire square and rectangular sections

Figure V. 7 — Scheme of selection of billet samples from rolled square and rectangular sections

Figure V. 7 — Scheme of selection of billet samples from rolled square and rectangular sections

V. 2.2 Selection of billet samples from the strip with a beveled edge of the sheet and broadband rolled — same as option 1

ANNEX G (recommended). THE MINIMUM DISTANCE FROM THE END OF PRODUCTS FOR SAMPLING, BLANKS AND SAMPLES FOR TESTS IN THE EVENT OF A DISPUTE

APPENDIX D
(recommended)

Table G. 1 — Minimum distance from end product sampling, blanks and samples

ANNEX D (recommended). THE SCHEME OF SAMPLING FOR TESTING FOR COLD BENDING

APPENDIX E
(recommended)

D. 1 Sampling from longs

Hire of round and polygonal cross-sections

Figure D. 1 — Scheme of sampling from rolled round and polygonal cross-sections

Figure D. 1 — Scheme of sampling from rolled round and polygonal cross-sections


Hire of square section

Figure D. 2 — Scheme of sampling from rolled square section

Figure D. 2 — Scheme of sampling from rolled square section

A rolled rectangular section

Figure D. 3 — Scheme of sampling from rolled rectangular cross-section

Figure D. 3 — Scheme of sampling from rolled rectangular cross-section

D. 2 Sampling from structural shapes*
_____________
* Angle corners sampling produce from more shelves.

Figure D. 4 — Scheme of sampling from structural shapes

Figure D. 4 — Scheme of sampling from structural shapes

D. 3 Sampling from sheet and broadband rolled — anywhere across the width of rolled of a thickness of:

Figure 5 — Scheme of sampling from the sheet and broadband rolled

Figure 5 — Scheme of sampling from the sheet and broadband rolled