GOST R 53845-2010

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  ГОСТ Р 53845-2010

GOST R 53845−2010 (ISO 377:1997) rolled steel. General rules of sample, blanks collection for mechanical and technological tests

GOST R 53845−2010
(ISO 377:1997)

Group B09

NATIONAL STANDARD OF THE RUSSIAN FEDERATION

ROLLED STEEL

General rules of sample, blanks collection for mechanical and technological tests

Steel rolled products. General rules of sampling, rough specimens and test pieces selection for mechanical and technological testing

OKS 77.040
AXTU 0908

Date of introduction 2011−01−01

Preface

The objectives and principles of standardization in the Russian Federation established by the Federal law of 27 December 2002 N 184-FZ «On technical regulation», and rules for the application of national standards of the Russian Federation — GOST R 1.0−2004 «Standardization in the Russian Federation. The main provisions"

Data on standard

1 PREPARED by Federal state unitary enterprise «Central research Institute of ferrous metallurgy them. I. P. Bardin» (FSUE «tsniichermet im. I. P. Bardina») based on authentic translation into Russian language specified in paragraph 4 of the standard, which is FSUE «STANDARTINFORM"

2 SUBMITTED by the Technical Committee for standardization TC 375 «steel Products from ferrous metals and alloys"

3 APPROVED AND put INTO EFFECT by the Federal Agency for technical regulation and Metrology of 9 July 2010 N 174-St

4 this standard is modified in relation to the international standard ISO 377:1997 «Steel and steel products. The sampling and preparation for mechanical testing» (ISO 377:1997 «Steel and steel products — Location and preparation of samples and test pieces for mechanical testing») by changes in certain phrases, words, links that are highlighted in italics*; by changing the content of individual structural elements, which are indicated by a vertical line situated on the margins of the text.
_______________
* In the original paper designation and number of standards in the section «Normative references» in italics, the rest on the text given in normal font. — Note the manufacturer’s database.

The standard includes additional applications DA, DB and DV, providing requirements for the selection of samples for testing on sediment and cold bending, as well as recommendations on where cuttings samples, blanks for samples and test samples with respect to the direction of rolling along the length of rental and the minimum distance from the end of the product in the event of a dispute.

The standard does not include requirements for pipe products in connection with various types of test pipes for domestic and foreign documents as well as links to ISO 3785:2006 and ISO 6929:1987 used in the international standard that is prematurely applied in the Russian national standardization due to different terminology in the classification of products and axis orientation of the samples that do not affect requirements for the sampling of blanks for samples and test samples.

These technical deviations have been made for the consideration of the peculiarities of national standardization

5 INTRODUCED FOR THE FIRST TIME


Information about the changes to this standard is published in the annually issued reference index «National standards», and the text changes and amendments — in monthly indexes published information «National standards». In case of revision (replacement) or cancellation of this standard a notification will be published in a 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 establishes General rules of sampling, blanks for samples and test specimens for tensile tests, impact bending, contoured, profiled, sheet and rolled broadband, as well as for testing on sediment and bending in cold condition.

2 Normative references

This standard uses the regulatory 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 ribbons

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

GOST 30456−97 metal Products. The rolled sheet and steel pipe. Methods of test for impact strength

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 published annually by the information sign «National standards» published as on January 1 of the current year and related information published monthly indexes published in 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 batch test product: Total quantity or weight of products that the results provided in accordance with the documents for the rental or ordering of testing of control units is accepted in whole or rejected as suitable, from arrival.

3.2 control unit of production: Product (e.g., rod, plate, sheet, coil) selected for testing.

3.3 sample: a Part of the control unit, sufficient to make from it one or more test samples.

Note — In some cases the breakdown may be the very unit.

3.4 blank sample: a Part of the sample, processed or not processed mechanically, subjected, if necessary, heat treatment for the manufacture of test specimens.

3.5 test sample: Part sampled or billet of a certain size, processed or not processed mechanically and brought to the state required for a particular test.

Note — In some cases, the test sample can be a sample or blank sample.

3.6 the state of control: a Condition in which the sample blank for sample or test sample can be subjected to thermal and (or) mechanical processing, wherein the status of the delivery.

In such cases, the sample blank for sample or test sample is called control sample, control or blank control test sample.

3.7 Illustration of the terms shown in figure 1.

Figure 1 — Illustration of the terms defined in section 3

Figure 1 — Illustration of the terms defined in section 3

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

4 General requirements for the sampling of blanks for samples and test samples

4.1 Representative test

Samples, blanks and test samples the samples taken in accordance with the provisions of annexes A, B and DA, should be considered to be representative for production.

Note — Technological processes of manufacture of hire, namely: smelting, hot and cold pressure treatment, heat treatment, etc. may not provide homogeneity of the metal structure. Therefore, the mechanical properties of rolled samples collected from the different production sites, may be different.

4.2 Marking of the control unit, the sample, blank sample and test sample

The test piece sample, blank sample and test sample must be marked in order to be able to track from which source party rental, where and with what orientation they were selected. If the clipping samples, blanks for samples and/or test samples to avoid the removal of marking is impossible, it should be moved or be applied again in the manufacture of the test sample for automated equipment. During testing and at the request of the customer transfer code should be executed in the presence of his representative.

When used for the manufacture of test specimens and testing fully automated equipment the markings on the samples, blanks for samples and testing samples can not apply because in this case, use a test system that eliminates erroneous results.

If necessary, the size of the sample should be sufficient for re-testing.

4.5 the Number of samples (blanks for samples) and test samples selected for

5 Selection and preparation of samples (blanks for samples) and the test conditions of mechanical properties

5.1 the Sample shall be selected in such a way that requirements regarding the provisions stipulated in annexes B and YES, it could be done. The size of the sample should be sufficient to produce the required amount stipulated by the tests of the samples and, as appropriate, testing of samples for re-testing.

5.2 the Direction of the longitudinal axis of the test piece relative to the main direction of deformation of the product must match the specified in the documentation for rental or purchase.

5.3 documentation for the hire must be provided in what state should determine its mechanical properties:

a) delivery condition (5.4) or

b) in the control condition (5.5).

5.4 Testing in the state of delivery

For tests of hire on delivery, the sample (blank samples) are selected from:

a) after forming and final heat treatment or

b) before heat treatment.

In the latter case, the sample must undergo a heat treatment under the same conditions as the rental.

The separation of the sample properties in the part, which needs to be cut, the test samples compared to the rental shall not be altered.

If the production of the test specimens fails to avoid deformation (curvature) of the sample, the edit should be carried out in cold condition, if the documentation of the rental is not otherwise provided.

5.5 Test in the control condition

5.5.1 Sample

A sample intended for testing in the control condition, separated from the control unit to rent in the ready state, which is provided in the documentation for hire.

Sampling should be performed so that the mechanical properties of rolled after heat treatment in the part of the sample (blank sample), which is intended for the manufacture of test specimens has not changed.

Note — If necessary edit, it can be performed before heat treatment in hot or cold condition. If the sample (blank sample) subjected to editing in the hot state, it should be performed at a temperature below the final temperature of heat treatment of rolled.

5.5.2 Blank sample

Blank sample intended for testing in the control condition, should be prepared:

a) machining before heat treatment.

If the size of the sample needs to be reduced before carrying out the heat treatment, the size, which handle the workpiece for a sample, and methods used for this give it the desired shape (for example, forging, rolling, machining) should be specified in the rental document;

b) heat treatment.

Heat treatment of the workpiece for the sample must be performed under conditions which provide sufficiently uniform heating, and the temperature of the workpiece sample is measured by a calibrated way. Heat treatment regime must meet the requirements of the documentation on the car.

For the blank sample must not be subjected to a predetermined heat treatment more than once, except for holiday, which can be repeated in a predetermined temperature range. For any re-test should select a new blank sample.

5.6 Selection and preparation of test samples for testing the mechanical properties

5.6.1 Cutting and machining

Fabricating test specimens should be cold, observing precautions 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 tests must be repaired by grinding (with abundant coolant supply) or polishing, provided that the selected method of surface finishing does not take the size and shape of test specimen for limit deviations regulated by the standard for the relevant test.

Annex a (informative). The equivalents of the terms defined in section 3, in English, French and German

Appendix B (recommended). The layout of blanks for the samples (test pieces) for mechanical testing

Appendix B
(recommended)

B. 1 General provisions

The present Annex establishes the layout of blanks for the samples (test pieces) for mechanical testing of following types of rentals:

— shaped sections;

— long products (round, square, hexagonal, rectangular — band) and rod;

— plates and wide.

The location of the blanks for the samples (test pieces) for mechanical testing (tensile and impact strength) are shown in figures B. 1-B. 11.

If you want more than one blank (a test sample), they can be located in the place close to each other.

B. 2 Shaped profiles

B. 2.1 Place cutting blanks for the samples (test specimens) for testing tensile and impact strength in relation to the width of the shelf is shown in figure B. 1.

Notes

1 For profiles with a bias of internal shelves blanks for the samples (test samples) if this is agreed when ordering, you can select from the wall (figure B. 1 b, d) or from the slanted shelves, but with additional machining.

2 In case of unequal slope faces internal shelves blanks for the samples (test samples) is allowed to select from the shelves.

3 angle corners of the selection of blanks for the samples (test samples) is carried out from the larger shelves.

B. 2.2 Place cutting blanks for the samples (test samples) against the thickness of the shelves

B. 2.2.1 Blanks for the samples (test specimens) for tensile testing

Place cutting blanks for the samples (test specimens) for tensile testing in relation to the thickness of the shelves — in accordance with figure B. 2.

In all cases, when it allows mechanical test equipment, use test samples that represent the full thickness of the profile (figure B. 2 a).

B. 2.2.2 Blanks for the samples (test specimens) for testing the impact strength

Place cutting blanks for the samples (test specimens) for testing the impact strength relative to the flange plate thickness — in accordance with figure B. 3.

B. 3 long products of round section rod

B. 3.1 Place cutting blanks for the samples (test specimens) for tensile testing in accordance with figure B. 4.

In all cases, when it allows the mechanical and test equipment, use test samples representing the full cross-section rolled (figure B. 4 a).

B. 3.2 Place cutting blanks for the samples (test specimens) for testing the impact strength in accordance with figure B. 5.

Note — Place the cutting out of samples from rolled steel of 25 mm diameter50 mm (figure B. 5 b and C), if not specified in the rental document or order, chosen by the manufacturer.

B. 4 Bars of hexagonal cross-section

B. 4.1 Place cutting blanks for the samples (test specimens) for tensile testing in accordance with figure B. 6.

In all cases, when it allows mechanical test equipment, use test samples representing the full cross-section rolled (figure B. 6 a).

B. 4.2 Place cutting blanks for the samples (test specimens) for testing the impact strength in accordance with figure B. 7.

Note — Place the fillet samples of 25 mmto 50 mm (figure B. 7 b and C), if not specified in the rental document or order, chosen by the manufacturer.

B. 5 rolled steel square and rectangular (strip) cross-section

B. 5.1 Place cutting blanks for the samples (test specimens) for tensile testing in accordance with figure B. 8.

In all cases, when it allows the mechanical and test equipment, use test samples representing the full cross-section rolled or flat samples (figure B. 8 a).

B. 5.2 Place cutting blanks for the samples (test specimens) for testing the impact strength in accordance with figure B. 9.

B. 6 Sheet and broadband rolled

B. 6.1 Place cutting blanks for the samples (test specimens) for tensile testing in accordance with figure B. 10.

In all cases, when it allows the mechanical and test equipment, should use the samples representing the full cross-section rolled (figure B. 10 a).

If the tensile test must be performed in the transverse direction, and the width of the film is insufficient to preparation for the test sample can be cut on the site, which from the edge of the sheet is at a distance , you should strive to be as close as possible to this place was the middle of the test piece.

B. 6.1.1 Place cutting blanks for the samples (test specimens) for tensile testing of steel plate in the thickness direction is carried out at a distance of half the width rolled.

B. 6.2 Place cutting blanks for the samples (test specimens) for testing the impact strength in accordance with figure B. 11. For sheets with thickness 40 mm the location of the workpiece is set by the standard for rental or in the order in accordance with figure B. 11 a, b or with.

Figure B. 1 — Shaped profiles. Place tenderloin pieces for test specimen tensile and impact strength in relation to the width of the shelf

Figure B. 1 — Shaped profiles. Place cutting blanks for the samples (test specimens) for testing tensile and impact strength in relation to the width of the shelf (B. 2.1)

Figure B. 2 — Shaped profiles. Place tenderloin pieces for samples for tensile testing in relation to the thickness of the shelves

a Flat sample the full thickness of the profile at 50 mm

1 — a wall; 2 — shelf

b — Cylindrical specimen with 50 mm

1 — a wall; 2 — shelf

with a Cylindrical sample at 50 mm

Figure B. 2 — Shaped profiles. Place cutting blanks for the samples (test specimens) for tensile testing in relation to the thickness of the shelves (B. 2.2.1)

Figure B. 3 — Shaped profiles. Place tenderloin pieces for samples for testing the impact strength relative to the thickness of the shelves

1 — wall; 2 — shelf

Figure B. 3 — Shaped profiles. Place cutting blanks for the samples (test specimens) for testing the impact strength relative to the thickness of the shelves (B. 2.2.2)

Figure B. 4 — rolled steel with round cross section and wire rods

Figure B. 4 — rolled steel of circular cross-section rod. Place cutting blanks for the samples (test specimens) for tensile testing (B. 3.1)

Figure B. 5 — rolled steel with round cross section and wire rods

Figure B. 5 — rolled steel of circular cross-section rod. Place cutting blanks for the samples (test specimens) for testing the impact strength (B. 3.2)

Figure B. 6 — Bars of hexagonal cross-section

Figure B. 6 — Bars of hexagonal cross-section. Place cutting blanks for the samples (test specimens) for tensile testing (B. 4.1)

Figure B. 7 — rolled steel hexagonal

Figure B. 7 — Bars of hexagonal cross-section. Place cutting blanks for the samples (test specimens) for testing the impact strength (B. 4.2)

Figure B. 8 — rolled steel square and rectangular sections

Figure B. 8 — rolled steel square and rectangular sections. Place cutting blanks for the samples (test specimens) for tensile testing (B. 5.1)

Figure B. 9 — rolled steel square and rectangular sections

Figure B. 9 — rolled steel square and rectangular sections. Place cutting blanks for the samples (test specimens) for testing the impact strength (B. 5.2)

Figure B. 10 -Flat and broadband rental

Figure B. 10 -Flat and broadband rental. Place cutting blanks for the samples (test specimens) for tensile tests (B. 6.1)

Figure B. 11 — Sheet broadband rental

Figure B. 11 — Sheet broadband rental. Place cutting blanks for the samples (test specimens) for testing the impact strength (B. 6.2)

Application YES (recommended). The scheme of sampling for testing for cold bending

App DB (recommended). Place cuttings samples, blanks for samples and test samples with respect to the direction of rolling along the length of the rental

Application DV (recommended). The minimum distance from the end of the unit to the place of sampling (blanks for samples, test samples) in the event of a dispute