GOST R 56281-2014
GOST R 56281−2014 Pipe extruded large-size round of aluminum alloy. Specifications
GOST R 56281−2014
NATIONAL STANDARD OF THE RUSSIAN FEDERATION
PIPE EXTRUDED LARGE-SIZE ROUND OF ALUMINUM ALLOYS
Specifications
Aluminum alloy extruded round tubes large. Specifications
OKS 77.150.10
GST 18 1350
18.1550
18 1950
Date of introduction 2015−08−01
Preface
1 DEVELOPED by Closed joint stock company «METAKON CENTER» (CJSC «METAKON»), a non-profit partnership «Alliance of aluminium extruders (NP April»), Federal state unitary enterprise «all-Russian Research Institute of Aviation Materials» (FSUE «VIAM»)
SUBMITTED 2 Closed joint stock company «METAKON CENTER» (CJSC «METAKON»)
3 APPROVED AND put INTO EFFECT by the Federal Agency for technical regulation and Metrology dated 26 November 2014 N 1885-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 large-size extruded round tubes with diameters from 300 to 750 mm with a wall thickness of from 8 to 30 mm of aluminum alloys 1561, 1980, 1985ч, 1915, 1935, 1911, intended for the national economy and exports.
The standard establishes technical requirements for list of alloys, grades, manufacture, inspection, testing and acceptance of pipes.
2 Normative references
This standard uses the regulatory references to the following international standards
GOST 9.510−93 unified system of protection from corrosion and ageing. Semi-finished products of aluminium and aluminium alloys. General requirements for temporary anticorrosive protection, packing, transportation and storage
GOST 9.904−82 unified system of protection from corrosion and ageing. Aluminum-based alloys. The method of accelerated testing of dissecting corrosion
GOST 427−75 Rulers measuring metal. Specifications
GOST 4784−97 Aluminum and aluminum deformable alloys. Brand
GOST 7502−98 metallic measuring tape. Specifications
GOST 7727−81 aluminum-based Alloys. Methods of spectral analysis
GOST 8692−88 Discs sanding fibre. Specifications
GOST 10006−80 Pipe metal. Test method tensile
GOST 11739.1−90 Alloys aluminium cast and wrought. Methods for determination of aluminium oxide
GOST 11739.2−90 Alloys aluminium cast and wrought. Methods of boron determination
GOST 11739.3−99 Alloys aluminum casting and wrought. Methods for determination of beryllium
GOST 11739.4−90 Alloys aluminium cast and wrought. Methods for determination of bismuth
GOST 11739.5−90 Alloys aluminium cast and wrought. Methods for determination of vanadium
GOST 11739.6−99 Alloys aluminum casting and wrought. Methods of iron determination
GOST 11739.7−99 Alloys aluminum casting and wrought. Methods for determination of silicon
GOST 11739.8−90 Alloys aluminium cast and wrought. Method of determining potassium
GOST 11739.9−90 Alloys aluminium cast and wrought. Method for the determination of cadmium
GOST 11739.10−90 Alloys aluminium cast and wrought. Method for the determination of lithium
GOST 11739.11−98 Alloys, aluminum casting and wrought. Methods for determination of magnesium
GOST 11739.12−98 Alloys, aluminum casting and wrought. Methods for determination of manganese
GOST 11739.13−98 Alloys, aluminum casting and wrought. Methods for determination of copper
GOST 11739.14−99 Alloys aluminum casting and wrought. Methods for determination of arsenic
GOST 11739.15−99 Alloys aluminum casting and wrought. Methods for determination of sodium
GOST 11739.16−90 Alloys aluminium cast and wrought. Methods for determination of Nickel
GOST 11739.17−90 Alloys aluminium cast and wrought. Methods for determination of tin
GOST 11739.18−90 Alloys aluminium cast and wrought. Methods for determination of lead
GOST 11739.19−90 Alloys aluminium cast and wrought. Methods for determination of antimony
GOST 11739.20−99 Alloys aluminum casting and wrought. Methods for determination of titanium
GOST 11739.21−90 Alloys aluminium cast and wrought. Methods for determination of chromium
GOST 11739.22−90 Alloys aluminium cast and wrought. Methods for the determination of rare earth elements and yttrium
GOST 11739.23−99 Alloys aluminum casting and wrought. Methods for determination of zirconium
GOST 11739.24−98 Alloys, aluminum casting and wrought. Methods for determination of zinc
GOST 14192−96 Marking of cargo
GOST 19300−86 Means of measurement of surface roughness by profile method. The profiling-contact profilometers. Types and basic parameters
GOST 24047−80 Semi-finished products from nonferrous metals and their alloys. Sampling for tensile test
GOST 24231−80 non-ferrous metals and alloys. General requirements to selection and preparation of samples for chemical analysis
GOST 25086−87 non-ferrous metals and their alloys. General requirements for methods of analysis
GOST 26877−91 metal Products. Methods of measuring form deviations of
GOST 27333−87 nondestructive testing. Measurement of the specific electrical conductivity of non-ferrous metals eddy-current method
GOST 27637−88 Semi-finished products of wrought aluminum alloys termouprochnennyh. Control of the microstructure on burnout by metallographic methods
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 Classification
3.1 Round tubes are classified by the material condition: without heat treatment (hot-pressed) — marked brand name of the alloy without additional signs;
annealed — M;
hardened and naturally aged — T;
hardened and artificially aged — T1.
Pipe in quenched and naturally aged condition of the alloy grade 1915 with a wall thickness of 8 and 10 mm is permitted to manufacture without heat treatment if they are on the mechanical properties satisfy the requirements for pipe in quenched and naturally aged condition.
3.2 pipe Sizes, grade, status of material delivery length (random, dimensional or multiple) and the number of this standard must be specified in the purchase order.
4 Assortment
4.1 pipe Sizes (outer diameter and wall thickness) and maximum deviations and the theoretical weight of 1 running meter of the pipe shall be as specified in table 1.
4.2 By agreement between the manufacturer and the consumer it is allowed manufacture of pipes, dimensions and limit deviations of which are not shown in table 1.
In the manufacture of pipes with intermediate dimensions for outside diameter and wall thickness not listed in table 1, the maximum deviations thereon shall be as for the nearest smaller size.
4.3 the Pipes are manufactured length up to 6 m or as agreed between the manufacturer and the consumer to 11 metres.
4.4 maximum deviations along the length of the pipe should not exceed +40 mm Pipes measuring and multiple gauge length shall be made with allowance for cut 5 mm.
4.5 Tubes shall be cut at right angles and should not have burrs on the outer surface. Cocina cutting exact or multiple lengths of pipe shall not exceed half of the limit deviations for the length of the tubes.
4.6 out-of-Roundness of pipes shall not withdraw their dimensions limit deviations for outer diameter.
4.7 the variable thickness of pipes should not display their dimensions for limit deviation for wall thickness.
4.8 Given the curvature of the pipe in 1 meter length should not exceed when the pipe diameter from 300 to 450 mm — 2.5 mm with a diameter from 450 to 750 mm — 3 mm. the Overall curvature of the pipe must not exceed the given curvature on the length of the pipe.
By agreement between the manufacturer and the consumer allowed additional requirements given and the total curvature of the pipe.
4.9 Theoretical weight of 1 meter pipe is calculated based on nominal diameter and nominal wall thickness. When determining the theoretical weight of 1 m pipe for the source size adopted, the density of aluminum alloy grade 1915, equal to 2.77 g/cm.
To calculate the theoretical mass of pipes made of other aluminum alloys should use the conversion factors given in Appendix A.
Examples of symbols
Tube aluminum alloy grade 1561 without heat treatment, with an outer diameter of 400 mm, a wall thickness of 12 mm random length:
Tube 1561 400x12 GOST R
The same in the annealed condition (M), length 5500 mm
Pipe 1561М 400x12x5500 GOST R
Tube aluminum alloy grade 1915 quenched and naturally aged condition (T), with a diameter of 580 mm, a wall thickness of 22 mm, length 6000 mm
Pipe 1915 Т 580x22x6000 GOST R
The same length, the fold (KD) 3000 mm:
Pipe 1915 Т 580x22x3000 CD GOST R
Table 1
| External diameter, mm |
Theoretical weight, kg per 1 meter of pipe wall thickness, mm | ||||||||||
| Nomin. | Pred. off. |
8 |
10 |
12 |
15 |
18 |
20 |
22 |
25 |
28 |
30 |
| 300 |
±2,0 | 20,328 | 25,236 | 30,075 | - | - | - | - | - | - | - |
| 320 |
21,721 | 26,977 | 33,163 | - | - | - | - | - | - | - | |
| 350 |
23,809 | 29,588 | 35,296 | - | - | - | - | - | - | - | |
| 360 |
±3,0 | - | 30,458 | 36,340 | 45,034 | - | - | - | - | - | - |
| 400 |
- | 33,939 | 40,518 | 50,255 | - | - | - | - | - | - | |
| 420 |
- | 35,679 | 42,606 | 52,866 | - | - | - | - | - | - | |
| 450 |
- | - | 45,739 | 56,782 | 67,668 | - | - | - | - | - | |
| 480 |
±3,5 | - | - | 48,872 | 60,698 | 72,368 | - | - | - | - | - |
| 500 |
- | - | 50,960 | 63,309 | 75,500 | 83,541 | - | - | - | - | |
| 520 |
- | - | - | 65,919 | 78,633 | 87,022 | - | - | - | - | |
| 550 |
- | - | - | 69,835 | 83,332 | 92,243 | 101,085 | - | - | - | |
| 580 |
- | - | - | 73,751 | 88,032 | 97,465 | 106,828 | - | - | - | |
| 600 |
- | - | - | 76,362 | Ninety one thousand one hundred sixty four | 100,946 | 110,657 | 125,094 | - | - | |
| 620 |
±4,0 | - | - | - | - | 94,297 | 104,427 | 114,486 | 129,445 | - | - |
| 650 |
- | - | - | - | 98,996 | 109,647 | 120,230 | 135,972 | - | - | |
| 680 |
- | - | - | - | 103,696 | 114,869 | 125,973 | 142,499 | 158,868 | - | |
| 700 |
- | - | - | - | 106,828 | 118,350 | 129,802 | 146,850 | 163,741 | - | |
| 720 |
- | - | - | - | 109,961 | 121,831 | 133,631 | 151,201 | 168,614 | 180,136 | |
| 750 |
- | - | - | - | - | 127,052 | 139,375 | 157,728 | 175,924 | 187,968 | |
5 Technical requirements
5.1 Pipe manufactured in accordance with the requirements of this standard for technological regulations approved in the prescribed manner.
5.1.1 Pipe made of aluminum alloy brand 1915 with the chemical composition according to GOST 4784, brands 1561, 1935, 1911 — [1], brands and 1985ч 1980 — on [2].
5.2 Mechanical properties of the tube in tension should conform to the values specified in table 2.
5.3 surface of the pipe (external and internal) must not have cracks, delamination, cavities, non-metallic inclusions, spots of corrosion origin and traces of nitrate.
5.3.1 On the surface of the pipes allowed:
— slivers, scratches, risks, nicks, bubbles, various kinds of pressing, if the depth of pipe does not display wall thickness outside negative maximum deviations;
prints in the form of dents, if the depth does not display the pipe for the maximum deviations in diameter;
— color of the tint, light and dark spots;
traces of the technological lubricant.
Table 2
| Grade | Delivery condition | Marking | Wall thickness, mm | Mechanical properties | ||
|
|
| ||||
| not less than | ||||||
| 1561 | Annealed | 1561М | All sizes |
330 (34) | 165 (17) | 10 |
| 1980 | Tempered and artificially aged |
1980Т1 | All sizes | 390 (40) | 340 (35) | 9 |
| 1985ч | Tempered and artificially aged |
1985чТ1 | All sizes | 390 (40) | 290 (30) | 9 |
| 1915 | Without heat treatment |
1915 | All sizes | 310 (32) | 195 (20) | 10 |
| Tempered and naturally aged |
1915Т | 350 (36) | 215 (22) | 10 | ||
| Tempered and artificially aged |
1915Т1 | 370 (38) | 245 (25) | 8 | ||
| 1935 | Tempered and artificially aged |
1935Т1 | All sizes | 330 (34) | 235 (24) | 10 |
| 1911 | Tempered and naturally aged |
1911Т | All sizes | 390 (40) | 280 (29) | 14 |
Notes | ||||||
5.4 allowed the gentle sweep of local defects of the surface of the pipe, if it does not display the pipe sizes for the negative maximum deviations. Cleaning of the cracks is not allowed.
5.5 the Macrostructure of the pipe should not have cracks, rihlat, bundles, utain, bright spots of crystallites is depleted of the solid solution.
For all alloys, except alloy grade 1561, the macrostructure of the pipe should not have inclusions of intermetallides.
5.5.1 On the macrostructure of pipe allowed:
— non-metallic inclusions in the form of points, not larger than 1 mm, if their number does not exceed 5 PCs., in the form of strokes with a length of not more than 1.5 mm, if their number does not exceed 4 PCs.;
— point intermetallic compounds on the tubes of alloy grade 1561, not larger than 0.1 mm in the form of single disparate points.
5.5.2 acceptance are Not signs of surface defects, detected during control of the macrostructure, if their depth is within the specified limit deviations.
5.6 Microstructure of the pipe after quenching should not have traces of burnout.
6 acceptance Rules
6.1 Pipe take parties. The party should consist of pipes of the same brand of aluminum alloy, the same material state that is the same size and shape a single document on quality.
Party heat-treated pipes may consist of one or more batches, if the tubes each batch meet the requirements of this standard.
Party tubes without heat treatment shall consist of one or more trunks, if the tubes of each heat meet the requirements of this standard.
The document about quality should contain:
is the trademark or name and trademark of manufacturer;
— the name of the consumer;
— brand aluminium alloy as material;
— the size or the cipher of pipes;
— the batch number;
the weight of the party;
— test results (mechanical properties only specify the maximum and minimum values);
— warranty of conformity between mechanical properties of the supplied pipe requirements of table 2 of this standard;
— date of shipment;
— the designation of this standard.
Note — At the request of the consumer to the document as I enclose copies of the protocols of chemical analysis.
6.2 the Manufacturer shall define the chemical composition of aluminium alloys for each cast.
Each melt is subjected to chemical analysis for the determination of alloying components and the main impurities. Other impurities not determined.
In case of unsatisfactory results it is possible to repeat the analysis. When unsatisfactory results of repeated analysis of melting marriage.
The consumer determines the chemical composition of the two pipes of the party.
6.3 Verification of geometric dimensions and surface quality are subjected to each pipe. Permitted to conduct random control at least 10% of the pipes from the party.
6.4 To check the mechanical properties and macrostructure of selected 5% of the pipes (pressovac) from the party, but at least two tubes (pressovac). The value of mechanical properties of tested pipes for all pipes included in this lot. At the request of the consumer verification of the mechanical properties and macrostructure subjected to each pipe (for pressing).
6.5 Mechanical properties of pipes checking on the specimens cut in shared direction.
6.6 Upon receipt of unsatisfactory sample results of testing the mechanical properties of at least one of the indicators it is carried out re-tests on twice the number of samples cut from the same end of the pipe (pressing).
In case of unsatisfactory results, re-testing the pipe is rejected, and the remaining pipe is subjected to test mechanical properties of the piece.
6.7 If unsatisfactory test results of a macrostructure, except utiny, the tube is rejected, and the remaining pipe of the party accept the results of routine monitoring.
6.7.1 in the presence of utiny to check the pipes (subject to compliance with the macrostructure of the other requirements) it should be completely removed, while the rest of the party cut pipe to a value equal to the length of the cut end from the check the tube or check on uterino piece.
6.8 To check the microstructure of the quenched pipe at the burnout take one pipe from each heat in the cage heat treatment.
Pipes are not to be quenched, not subject to verification of the microstructure, but the manufacturer guarantees the absence of burnout in the delivery condition.
6.9 Tests for dissecting corrosion (RAC) is carried out at the request of the consumer.
7 test Methods
7.1 Selection and preparation of samples for determining the chemical composition of the pipes is carried out according to GOST 24231.
7.2 Determination of chemical composition of aluminum alloys is carried out by chemical method according to GOST 25086, 11739.1 GOST, GOST 11739.2, 11739.3 GOST, GOST 11739.4, 11739.5 GOST, GOST 11739.6, 11739.7 GOST, GOST 11739.8 — 11739.10 GOST, GOST 11739.11 — GOST 11739.13, GOST 11739.14, 11739.15 GOST, GOST 11739.16 — 11739.19 GOST, GOST 11739.20, 11739.21 GOST, GOST 11739.22, 11739.23 GOST, GOST 11739.24 or spectral method GOST 7727.
If there are disagreements chemical composition determined by chemical method.
7.3 Measurement of cross-sectional dimensions of pipes is carried out with an accuracy of 0.1 mm.
7.4 Measurement of the length of the pipes is carried out metal measuring tape according to GOST 7502 or metal ruler according to GOST 427.
Measurement of the curvature of the pipes is carried out according to GOST 26877.
7.4.1 Dimensions of the pipe sections is checked at the ends with the output and utrennego all.
7.5 inspection of the outer surface of the pipe is carried out without the use of magnifying devices.
Inspection of internal pipe surface hold the lighted screen.
The depth of defects measured by profilometer according to GOST 19300 or depth indicator (special) according to normative-technical documentation.
7.5.1 cleaning of tubes is carried out in either direction, a scraper or sanding discs fibre according to GOST 8692 no larger than 50 N or other abrasive devices and tools without deteriorating the surface in comparison with the sweep of the specified circles.
7.6 Selection of samples for tensile tests carried out according to GOST 24047 or GOST 10006.
7.7 Testing of mechanical properties carried out by destructive testing (tensile) according to GOST 10006, or by nondestructive testing (eddy current) according to GOST 27333 [3]*.If there is discrepancy testing of mechanical properties carried out according to GOST 10006.
________________
* POS.[3], [4], see Bibliography. — Note the manufacturer’s database.
7.7.1 To test the mechanical properties by the method of destructive testing of each check tube (compression) of the output end in the longitudinal direction, cut one sample.
The estimated length of the sample set according to the formula:
where F — the initial cross-sectional area of specimen for testing according to GOST 10006.
7.7.2 the Test of mechanical properties of eddy current is carried out on the surface of the pipe in the state after quenching and aging.
7.8 Macrostructure of the pipe is checked for transverse microtemplate carved with utrennego the end of the tube (pressing).
7.9 the Microstructure of the pipes is checked by metallographic methods on one sample cut from the output end of the pipe according to GOST 27637 or eddy current according to GOST 27333 and [4].
7.10 Tests for dissecting corrosion (RAC) is carried out according to GOST 9.904.
8 Marking, packaging, transportation and storage
8.1 adopted At each tube at the output end put the stamp of the technical control Department of the manufacturer and a mark indicating the grade alloy, material, pipe size (code), lot number and number of the pipe.
Allowed marking of the pipe with indelible paint.
8.2 Temporary corrosion protection, packaging and transportation — according to GOST 9.510. Transport marking of packages — according to GOST 14192 with the additional drawing:
— product names;
— grade alloy;
— state material;
— the size of the pipes;
— the batch number.
8.3 a quality Document (certificate) should be sent to the consumer concurrently with the shipment of pipes, or it may be issued by the inspector in his hands.
8.4 marking of the pipes intended for export, is carried out in accordance with the purchase order.
Annex a (informative). Conversion factors to calculate the approximate theoretical weight of 1 m pipe of aluminum alloy
Appendix A
(reference)
Conversion factors to calculate the approximate theoretical weight of 1 m of pipes of aluminum alloys:
| Grade |
Ratio |
| 1561 |
0,953 |
| 1980 |
1,000 |
| 1985 |
0,964 |
| 1915 |
1,000 |
| 1935 |
1,000 |
| 1911 |
1,000 |
