GOST R 56031-2014

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  ГОСТ Р 56031-2014

GOST R 56031−2014 Wire extruded magnesium alloys. Specifications

GOST R 56031−2014

NATIONAL STANDARD OF THE RUSSIAN FEDERATION

WIRE EXTRUDED FROM MAGNESIUM ALLOYS

Specifications

Pressed Magnesium alloys wire. Specifications

OKS 77.150.20
GST 18 2330

Date of introduction 2015−03−01

Preface

1 DEVELOPED by JSC «Russian Institute of light alloys» (JSC «VILS»)

2 SUBMITTED by the Technical Committee for standardization TC 297 «Materials and semi-finished products from light and special alloys"

3 APPROVED AND put INTO EFFECT by the Federal Agency for technical regulation and Metrology of June 03, 2014 N 496-St

4 INTRODUCED FOR THE FIRST TIME

Application rules of this standard are established in GOST R 1.0−2012 (section 8). Information about the changes to this standard is published in the annual (as of January 1 of the current year) reference index «National standards» and the official 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 a future issue of 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 (gost.ru)

1 Scope

This standard applies to extruded wire of magnesium alloys used for welding and other industries.

2 Normative references

This standard uses the regulatory references to the following standards:

GOST 12.1.005−88 standards System of labor safety. General hygiene requirements for working zone air

GOST 12.1.007−76 System of standards of occupational safety. Harmful substances. Classification and General safety requirements

GOST 9.511−93 unified system of protection from corrosion and ageing. Semi-finished products of magnesium alloys. General requirements for temporary anticorrosive protection, packing, transportation and storage

GOST 515−77 Paper, wrapping bituminosa and tarry. Specifications

GOST 2856−79 Alloys magnesium casting. Brand

GOST 3240.0−76 magnesium Alloys. General requirements for methods of analysis

GOST 3240.1−76 magnesium Alloys. Methods for determination of aluminium

GOST 3240.2−76 magnesium Alloys. Methods for determination of manganese

GOST 3240.3−76 magnesium Alloys. Methods for determination of zinc

GOST 3240.4−76 magnesium Alloys. Methods definition India

GOST 3240.5−76 magnesium Alloys. Methods for determination of zirconium

GOST 3240.6−76 magnesium Alloys. Methods for determination of cadmium

GOST 3240.7−76 magnesium Alloys. Method of determination of calcium

GOST 3240.8−76 magnesium Alloys. Method for determination of silicon

GOST 3240.9−76 magnesium Alloys. Methods for the determination of lanthanum

GOST 3240.10−76 magnesium Alloys. Method for the determination of lithium

GOST 3240.11−76 magnesium Alloys. Method of determining potassium

GOST 3240.12−76 magnesium Alloys. Methods for determination of copper

GOST 3240.13−76 magnesium Alloys. Method for the determination of sodium

GOST 3240.14−76 magnesium Alloys. Method for the determination of neodymium

GOST 3240.15−76 magnesium Alloys. Methods for determination of Nickel

GOST 3240.16−76 magnesium Alloys. Methods of determining the amount of rare earth elements and cerium

GOST 3240.17−76 magnesium Alloys. Methods for determination of silver

GOST 3240.18−76 magnesium Alloys. Method of determining titanium

GOST 3240.19−76 magnesium Alloys. Method of determination of chlorine

GOST 3240.20−76 magnesium Alloys. Methods of iron determination

GOST 3240.21−76 magnesium Alloys. Method for the determination of beryllium

GOST 8273−75 wrapping Paper. Specifications

GOST 14192−96 Marking of cargo

GOST 14957−76 Alloys magnesium wrought. Brand

GOST 19433−88 dangerous Cargo. Classification and marking

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

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 replaced with a reference standard, which was given an undated reference, then it is recommended to use the current version of this standard, taking into account all enabled in this version modifications. If replaced with a reference standard, which is given a dated reference, it is recommended to use the version of this standard referred to above by year of approval (acceptance). If after approval of this standard in the reference standard, which is given a dated reference, a change affecting a provision to which reference, the provision is recommended to be applied without taking into account this change. If the reference standard is cancelled without replacement, the position in which reference is made to him, recommended to be used in part not affecting this link.

3 Main parameters and dimensions

3.1 Wire produced in accordance with the requirements of this standard for technological regulations approved in the prescribed manner.

3.2 wire Diameter, the maximum deviation and the theoretical weight of 1 m of wire must conform to the values given in table 1.


Table 1

3.3 Theoretical weight of 1 m of wire is calculated based on nominal sizes at a density of 1.8 g/cm, which corresponds to the density of the magnesium alloy grade MA5.

To calculate the theoretical mass of the wire of other alloys should use the conversion factors given in Appendix A.

Examples of symbols:

Wire of alloy MA2−1 with a diameter of 2.0 mm, in the Bay:

Wire MA2−1 BT 2,0 GOST R

The alloy wire МА8, diameter 5.0 mm, beam:

Wire МА8 5,0 PCH GOST R

4 Technical requirements

4.1 Wire made of magnesium alloys MA2, MA2−1, MA2−1pch, MA5, МА8, MA15, MA18, MA21 (ИМВ2), ML5, ML10, ВМД10, MA20−1 (SV-1), МА3−1 (SV-2). The chemical composition of the alloys MA2, MA2−1, MA2−1pch, MA5, МА8, MA15, MA18, MA21 (ИМВ2) must meet the requirements of GOST 14957, grades ML5, ML10 GOST 2856, grades ВМД10, MA20−1 (SV-1), МА3−1 (SV-2) is specified in table 2.

4.2 Wire put in hot-pressed condition with no oxidation.


Table 2

End of table 2

4.3 On the wire surface should be free of cracks, shells, dents, delaminations, sharp differences.

On the surface of the wire allowed the local defects: scratches, intersecting, if the depth does not show a wire for the negative limit deviation for diameter.

Allowed local gentle Stripping the wire, if it does not display the wire diameter for the negative maximum deviations. Cleaning of the cracks is not allowed.

4.4 Curvature of the wire is not regulated.

4.5 Mechanical properties of the wire are not in control.

4.6 Macrostructure of the wire is not in control.

5 acceptance Rules

5.1 Wire take parties. The party should consist of wire of one brand of a magnesium alloy, of one or more heats of the same diameter and decorated with a single document about quality that contains:

— trademark or name of the manufacturer and trademark;

— the name of the consumer;

— Marc magnesium alloy;

the diameter of the wire;

— the batch number;

the weight of the party;

— date of shipment;

— the designation of this standard.

5.2 To determine the chemical composition of alloying elements and main impurities — take two bunches or two bays from the party.

Allowed the manufacturer to determine the chemical composition of the magnesium alloys for each cast.

5.3 checking the diameter and quality of the wire surface is subjected to each Bay of the beam in at least two areas in mutually perpendicular directions.

5.4 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 apply to the entire party.

6 test Methods

6.1 determination of the chemical composition of magnesium alloys is carried out according to GOST 3240.0 — GOST 3240.21.

Allowed to carry out chemical analysis by other methods of equal accuracy standard.

The selection and preparation of samples for determining the chemical composition of the wire is carried out in the churchyard 24231.

The differences in the evaluation of the chemical composition analysis is carried out according to GOST 3240.0 — GOST 3240.21.

6.2 measurement of the diameter of the wire is carried out measuring tools that provide required accuracy of measurement.

6.3 quality Control of the wire surface is carried out without the use of magnifying devices.

7 safety Requirements and environmental protection

7.1 in the manufacture of wire from magnesium alloys it is necessary to consider the following:

— shavings of a magnesium alloy and the burrs on the products can be ignited by local heating from 400 to 500°C:

— primed magnesium alloy is decomposed by water with the subsequent explosion;

— water enhances the burning of magnesium alloys.

7.2 the degree of impact on the body magnesium alloys belong to the third level of danger according to GOST 12.1.007. The air in the working area must meet sanitary and hygienic requirements of GOST 12.1005*.
________________
* Probably, the error of the original. Should read: GOST 12.1.005−88. — Note the manufacturer’s database.

7.3 conditions of transportation and storage of wire from magnesium alloys belong to the 4th class of danger according to GOST 19433.

8 Marking, packaging, transportation and storage

8.1 To the wire (Cove or beam) attach a label stating the make of alloy, diameter, lot number and hallmarks OTC.

8.2 Wire supply without conservation.

8.3 the Bay are Packed in wooden boxes lined inside bituminoase paper according to GOST 515.

Bundles of wire wrapped in one layer of wrapping paper according to GOST 8273 and one layer bituminoase paper according to GOST 515 and placed in wooden boxes.

8.4 Transport and storage — by GOST 9.511.

8.5 Transport marking of packages — according to GOST 14192 with the following additional inscriptions: the name of the finished grade magnesium alloy, the room of the party.

8.6 Wire transporterowych rail, road and water transport in accordance with goods transportation regulations applied to this type of transport.

Annex a (informative). Conversion factors

Appendix A
(reference)

Table A. 1 — Conversion factors for calculating the approximate theoretical weight of 1 m of wire of magnesium alloys