GOST 18475-82

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  ГОСТ 18475-82

GOST 18475−82 cold-rolled Tubes aluminum and aluminum alloys. Specifications (with Amendments No. 1, 2)

GOST 18475−82

Group В64

STATE STANDARD OF THE USSR


COLD-DEFORMED PIPES MADE OF ALUMINIUM
AND ALUMINUM ALLOYS

Specifications

Aluminium and aluminium alloy
cold rolled tubes. Specifications

GST 18 1150

Date of introduction 1984−01−01

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of aviation industry of the USSR

DEVELOPERS:

V. V. Griner, V. S. Kurbatov, P. P. Adams

2. APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from 17.12.82 N 4801

3. REPLACE GOST 18475−73

4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

The designation of the reference document referenced	Item number
GOST 9.011−79	6.1; 6.2
GOST 427−75	5.5
GOST 3221−85	5.1
GOST 4784−74	3.1
GOST 6507−90	5.5
GOST 7502−89	5.5
GOST 7727−81	5.1
GOST 10006−80	5.4
GOST 11069−74	3.1
GOST 11739.1−90, GOST 11739.2−90	5.1
GOST 11739.3−82	5.1
GOST 11739.4−90, GOST 11739.5−90	5.1
GOST 11739.6−82, GOST 11739.7−82	5.1
GOST 11739.8−90 — GOST 11739.10−90	5.1
GOST 11739.11−82 — GOST 11739.15−82	5.1
GOST 11739.16−90 — GOST 11739.19−90	5.1
GOST 11739.20−82	5.1
GOST 11739.21−90, GOST 11739.22−90	5.1
GOST 11739.23−82, GOST 11739.24−82	5.1
GOST 12697.1−77 — GOST 12697.12−77	5.1
GOST 14192−77	6.2
GOST 24047−80	5.3
GOST 24231−80	5.2
GOST 25086−87	5.1

5. A REISSUE with Change in N 1, approved in June 1988 (IUS 10−88)

AMENDED, published in the IUS N 8, 2004

The amendment introduced by the legal Bureau «Code"

The Change No. 2 adopted by the Interstate Council for standardization, Metrology and certification (Protocol No. 24 dated 05.12.2003). The state developed by Russia. By the resolution of Gosstandart of Russia from 09.03.2004 N 144-St introduced on the territory of the Russian Federation from 01.09.2004 and published in IMS No. 6, 2004

Change 2 N entered the law office of «Code» in the text IUS N 6, 2004

This standard applies to cold-drawn tubes of aluminium and aluminium alloys, designed for the needs of the national economy and exports.

(Changed edition, Rev. N 1).

1. CLASSIFICATION

1.1. The pipes are divided as follows:

in the form section:

round — CU,

square — SQUARE,

rectangular — OL,

shaped — FS;

by state of material:

annealed — M,

cold-worked — N,

hardened and naturally aged — T

hardened and artificially aged — T1

cold-worked after quenching and naturally aged — TN,

cold-worked after quenching and artificially aged — Т1Н.

Square and rectangular tubes are made of annealed and cold-worked from alloys Amg1, AB, D1, and quenched and naturally aged alloys from AB and D1.

2. ASSORTMENT

2.1. Sizes and theoretical weight of round tubing shall be as specified in table.1.

Table 1

* Average external diameter, mm		Theoretical weight of 1 m pipe, kg, at the average* thickness, mm
0,5	0,75	1,0	1,5	2,0	2,5	3,0	3,5	4,0	5,0
Nomin.	Pred. off.	Permissible raznoshennoy, mm, not more
0,10	0,16	0,20	0,28	0,36	0,40	0,50	0,50	0,56	0,80
6	-0,15	0,023	0,034	0,043	0,058	0,070	-	-	-	-	-
7**	0,027	0,040	0,051	0,071	0,087	-	-	-	-	-
8	0,032	0,046	0,060	0,084	0,104	-	-	-	-	-
9**	0,036	0,053	0,068	0,097	0,121	-	-	-	-	-
10	0,040	0,059	0,077	0,110	0,138	0,163	-	-	-	-
11**	0,045	0,065	Of 0.085	0,122	0,155	0,185	-	-	-	-
12	0,049	0,072	0,094	0,135	And 0.172	0,206	0,235	-	-	-
13	0,053	0,078	Is 0.102	0,148	0,189	0,228	Is 0.260	-	-	-
14	0,057	0,084	0,111	0,161	0,207	0.249 V.	0,286	-	-	-
15	0,062	0,091	0,119	0,174	0,224	0,271	0,312	-	-	-
16	0,066	0,097	0,128	0,186	0,241	0,292	0,338	0,381	-	-
17	0,070	The 0.103	0,136	0,199	0,258	0,313	Of 0.363	0,412	-	-
18	0,074	0,110	0,145	Of 0.212	0,275	0,335	0,389	0,442	-	-
19	0,079	0,116	0,153	0,225	0,292	0,356	0,415	0,472	-	-
20	0,083	0,123	0,162	0,238	0,309	0,378	0,440	0,502	0,557	-
22	-0,20	0,091	0,135	0,179	Of 0.263	0,343	0,421	0,492	0,562	0,627	0,739
23	0,096	0,142	0,187	0,276	0,360	0,442	0,518	0,593	0,661	0,782
24	0,100	0,148	0,196	0,289	0,377	0,464	0,543	0,623	0,696	0,825
25	0,104	0,154	0,204	0,302	0,395	Appears to be 0.485	0,569	0,653	0,730	0,868
26	0,109	0,161	0,213	0,314	0,411	0,507	0,595	0,683	0,765	0,911
27	-	0,167	0,221	0,327	0,429	0,528 which	0,621	0,714	0,799	0,954
28	-	0,173	0,230	0,340	0,446	0,550	0,646	0,744	0,834	0,996
30	-	0,186	0,247	0,366	0,480	0,593	0,698	0,804	0,903	1,082
32	-0,25	-	0,199	0,264	0,391	To 0.514	0,636	0,749	0,865	0,972	1,168
33**	-	0,205	0,272	0,404	0,531	0,657	0,775	0,895	1,007	1,211
34	-	0,211	0,281	0,417	0,548	0,679	0,801	0,923	1,041	1,254
35	-	0,218	0,289	0,430	0,565	0,700	0,826	0,955	1,076	1,297
36	-	0,224	0,298	0,442	0,583	0,722	0,852	0,985	1,110	1,340
37**	-	0,231	0,306	0,455	0,600	0,743	Of 0.878	1,015	1,145	1,383
38	-	0,237	0,315	0,468	0,617	0,765	0,904	1,046	1,179	1,426
40	-	0,250	0,332	0,494	0,651	0,807	0,955	1,106	1,248	1,512
42	-	0,262	0,349	0,519	0,685	0,850	1,007	1,166	1,317	1,598
43**	-	0,269	0,357	0,532	0,702	0,872	1,032	1,197	1,352	1,641
45	-	0,281	0,374	0,557	0,736	0,915	1,084	1,257	1,421	1,727
48	-	0,300	0,400	0,596	0,788	0,979	1,161	1,348	1,525	1,856
50	-	0,313	0,417	0,621	0,822	1,022	1,212	1,408	1,594	1,942
52	-0,30	-	0,326	0,434	0,647	0,856	1,065	1,264	1,469	1,663	2,027
53	-	0,332	0,442	0,660	0,873	1,087	1,290	1,499	1,697	2,070
55	-	0,345	0,459	0,685	0,907	1,130	1,341	1,559	1,766	2,156
58	-	0,364	Appears to be 0.485	0,724	0,959	1,194	1,418	1,650	1,870	2,285
60	-	0,377	0,502	0,749	0,993	1,237	1,470	1,710	1,939	2,371
62	Mobility in soil -0,35	-	0,389	0,519	0,775	1,027	1,280	1,521	1,771	2,008	2,457
63	-	0,396	0,527	0,788	1,044	1,301	1,547	1,801	2,043	2,500
65	-	-	-	0,813	1,078	1,344	1,598	1,861	2,112	2,586
66	-	-	-	0,826	1,095	1,366	1,624	1,891	2,146	2,629
68	-	-	-	0,852	1,130	1,409	1,675	1,952	2,215	2,715
70	-	-	-	0,877	1,164	1,452	1,727	2,012	2,285	2,801
75	-	-	-	0,941	1,249	One thousand five hundred fifty nine	1,856	2,163	2,457	3,015
80	-	-	-	-	1,335	1,666	1,984	2,314	2,630	3,230
85	-0,50	-	-	-	-	1,420	1,774	2,113	2,465	2,803	3,445
90	-	-	-	-	1,506	1,881	2,241	2,616	2,975	3,660
95	-	-	-	-	1,591	1,989	2,370	2,767	3,148	3,874
100	-	-	-	-	1,677	2,096	2,499	2,918	3,321	4,089
105	-	-	-	-	1,762	2,204	2,627	3,069	3,494	4,304
110	-	-	-	-	1,847	2,311	2,756	3,220	3,666	4,519
115	-	-	-	-	1,933	2,418	2,885	3,371	3,839	4,734
120	-	-	-	-	2,018	2,526	3,013	Three thousand five hundred twenty two	4,012	4,948
130	-1,50	-	-	-	-	-	-	3,271	3,824	4,357	5,378
140	-	-	-	-	-	-	3,528	4,126	4,703	5,807
150	-	-	-	-	-	-	3,785	4,428	5,048	6,237

________________
* See help application.

** New development not to apply.


Tubes of alloy grade 1955 manufactured with an outer diameter of 40 mm and a wall thickness of not less than 1.0 mm, and in a state of cold-worked after quenching and naturally aged and cold-worked after quenching and artificially aged with a wall thickness of not less than 1.5 mm and an outer diameter of not less than 12 mm.

2.2. Sizes and theoretical weight of square pipes shall be as specified in the hell.1 and in table.2.

Damn.1

Table 2

Square side, mm		Theoretical weight of 1 m pipe, kg, with an average wall thickness, mm
1,0	1,5	2,0	2,5	3,0	4,0	5,0
Nomin.	Pred. off.	Permissible raznoshennoy, mm, not more
0,20	0,28	0,36	0,40	0,50	0,56	0,80
10	±0,50	0,091	0,125	-	-	-	-	-
12	0,113	0.157 inch	-	-	-	-	-
14	0,135	0,190	Of 0.236	-	-	-	-
16	0,156	0,222	0,280	-	-	-	-
18	0,178	0,255	0.323	0,384	-	-	-
22	-	0,320	0,411	0,494	0,566	-	-
25	-	0,369	0,476	0,576	0,664	-	-
28	-	0,418	0,541	0,658	0,763	0,959	-
40	-	-	0,802	0,986	1,156	1,481	-
48	-	-	-	1,205	1,418	1,833	-
60	±0,60	-	-	-	-	-	2,361	2,851

2.3. Sizes and theoretical weight of rectangular pipes shall be as specified in the hell.2 and in table.3.

Damn.2

Table 3

Side of the rectangle, mm				Theoretical weight of 1 m pipe, kg, at the average* thickness, mm
				1,0	1,5	2,0	2,5	3,0	4,0	5,0
Nomin.	Pred. off.	Nomin.	Pred. off.	Permissible raznoshennoy, mm, not more
0,20	0,28	0,36	0,40	0,50	0,56	0,80
14	±0,50	10	±0,50	0,113	0.157 inch	0,193	-	-	-	-
16	±0,50	12	±0,50	0,135	0,190	Of 0.236	-	-	-	-
18	±0,50	10	±0,50	0,135	0,190	Of 0.236	-	-	-	-
18	±0,50	14	±0,50	0,156	0,222	0,280	0,330	-	-	-
20	±0,50	12	±0,50	-	0,222	0,280	0,330	-	-	-
28	±0,50	22	±0,50	-	0,369	0,476	0,576	0,664	-	-
32	±0,50	18	±0,50	-	0,369	0,476	0,576	0,664	0,821	-
36	±0,50	20	±0,50	-	0,418	0,541	0,658	0,763	0,953	-
38	±0,50	18	±0,50	-	0,418	0,541	0,658	0,763	0,953	-
40	±0,50	25	±0,50	-	0,491	0,639	0,781	0,910	1,151	-
45	±0,50	30	±0,50	-	-	-	0,918	1,074	1,371	-
50	±0,50	30	±0,50	-	-	-	0,986	1,156	1,481	1,757
55	±0,50	40	±0,50	-	-	-	1,192	1,402	1,811	2,167
60	±0,60	40	±0,50	-	-	-	1,260	1,484	1,921	2,304

2.4. The shape and size of the link pipe shall conform to the drawings agreed between manufacturer and user.

2.5. Allowed in coordination with the consumer manufacturing of pipes with intermediate dimensions on the outer diameter sides and wall thickness not listed in table.1−3. Tolerances for these dimensions are taken as the nearest smaller size.

2.6. Pipes are manufactured in length from 1 to 6 m.

Pipes with a diameter from 140 to 150 mm are made in length more than 4 m.

2.6.1. Pipe is manufactured in random lengths, or a multiple dimensional measuring length within the dimensions specified in paragraph 2.6.

Pipe exact or multiple lengths manufactured with an interval of 500 mm.

2.6.2. Tubes of aluminium grades A5, AD0 and AD1 aluminum alloys AMC, AMCs, Amg0,7, Amg1, AD31, 1955 with a diameter up to 16 mm, inclusive, with a wall thickness of at least 1 mm (for alloy grade 1955 — with a wall thickness of not less than 1.5 mm) is allowed to produce in coils of random length.

(Changed edition, Rev. N 1).

2.7. Limit deviations of the length of the pipes exact or multiple lengths shall not exceed +15 mm.

2.8. Multiple pipe lengths should produce given the allowance for each cut is 5 mm.

2.9. The ovality of pipes shall not exceed the limit deviation specified in table.4.

Table 4

The ratio of wall thickness to outside diameter	Permissible ovality
To 1:30	2-fold limit deviation of the outer diameter
SV. 1:30 to 1:50	3-fold the limit deviation of the outer diameter
«1:50	6-fold the limit deviation of the outer diameter

2.10. Transverse deflection of the sides of square and rectangular tubes shall not exceed:

0.5 mm — with side up to 50 mm;

0.75 mm — with side St… 50 mm.

2.11. Smooth twisting of square and rectangular tubes shall not exceed 1° per 1 m length.

2.12. Pipe must be straight. Deviation from straightness per 1 m of length shall not exceed 1 mm.

Total deviation from straightness (deflection) must not exceed the permissible deviations from straightness per 1 m pipe length in metres.

For annealed pipes with a diameter or side to 30 mm inclusive, the deviation from straightness per 1 m that is fixed by applying force not exceeding 50 N (5 kgf) on the pipe, mounted on a flat plate.

For annealed pipes made of alloys of D1 and 1955 with a diameter or side exceeding 30 mm the deviation from straightness per 1 m must not exceed 3 mm.

2.13. Theoretical weight of 1 m pipe calculated by the average outside diameter and average wall thickness.

When determining the theoretical weight of 1 m pipe for the source size adopted, the density of the aluminum alloy V95 stamps equal to 2.85 g/cm. To calculate the theoretical mass of other aluminum alloys should use conversion factors that are listed in the informational Annex.

Examples of symbols

Tube made of aluminum AD1 brands, cold-worked condition, round, with an outer diameter of 40 mm, a wall thickness of 3 mm random length:

Pipe AD1.N. CU. 40x3 GOST 18475−82

Tube aluminum alloy grade 1955, cold-worked after quenching and naturally aged condition, round with a diameter of 40 mm, a wall thickness of 3 mm, a length that is a multiple (CD) 2000 mm:

Pipe 1955. TN. CU 40х3х2000 CD key GOST 18475−82

The same cold-worked after quenching and artificially aged condition, random length:

Pipe 1955. Т1Н. CU 40x3 GOST 18475−82

Tube aluminum alloy grade D1 in the annealed condition, a square with sides of 40 mm, a wall thickness of 3 mm, length 3000 mm:

The Pipe D1.M.KV 40х40х3х3000 GOST 18475−82

Tube aluminum alloy grade D1, quenched and naturally aged condition, rectangular, with sides of 40 and 25 mm, a wall thickness of 3 mm, a length that is a multiple (CD) 2000 mm:

The Pipe D1.T.PR 40х25х3х2000 CD key GOST 18475−82

Tube aluminum alloy grade D1, annealed, shaped (room), with an outer diameter of 40 mm, a wall thickness of 3 mm random length:

The Pipe D1.M.FS 40x3 GOST 18475−82

Pipe of aluminium alloy brand AD31, cold-worked condition, with a diameter of 16 mm, a wall thickness of 3 mm, in the Bay (BT):

Pipe AD31. N 16х3хБТ GOST 18475−82

(Changed edition, Rev. N 1).

3. TECHNICAL REQUIREMENTS

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

Pipe is manufactured by extrusion with a needle or through a combined matrix with subsequent cold deformation of aluminum brand A5 chemical composition according to GOST 11069−2001, aluminum brands, AD, and AD1 aluminum alloys AMC, AMCs, Amg1, AD31, AB, D1 with the chemical composition according to GOST 4784−97 and aluminum alloys Amg0,7, and 1955 according to normative-technical documentation.

By agreement with the consumer allowed to manufacture pipes of grades of aluminium A8 and A85 according to GOST 11069−2001.

(Changed edition, Rev. N 1, 2).

3.2. Mechanical properties of tubes in tension must correspond to the table.5.

3.3. The pipes must be trimmed evenly. Cut end Squareness, mm should not exceed one third of the limit deviations for the length of the pipe.

Square and rectangular pipes of all sizes and of round tubes with diameter 32 mm are made without deburring.

For other pipe sizes the deburring is performed at the request of the consumer.

3.4. The outer and inner surface of the pipe should not have cracks, delamination, non-metallic inclusions, spots of corrosion origin.

On the surface of the pipes allowed:

slivers, nicks, bubbles, scratches, traces of technological lubricant, traces of Stripping defects, traces of broach, if the depth does not display wall thickness of the tube beyond its minimum allowable value; prints in the form of dents, as well as circular and spiral traces of finish, if they do not take the tube for maximum deviations in diameter and wall thickness; longitudinal risk for pipes with wall thickness up to 2 mm in an amount of not more than two 10 mm perimeter with a depth of not more than 0.04 mm, with a wall thickness of 2 mm with a depth of not more than 0.05 mm;

the color of the tint, light and dark spots and roughness from pulling.

(Changed edition, Rev. N 1).

3.5. On pipes is not allowed coarse grain structure (grain size).

3.6. Macrostructure of the tube alloys D1 and 1955, produced by pressing using a combined matrix should not have bundles.

3.7. Microstructure of the tubes hardened and must not have signs of burnout.

Table 5

Grade	Condition material	Wall thickness, mm	Diameter (side), mm	Temporary resistance , MPa (kgf/mm)	Yield strength , MPa (kgs/mm)	Elongation , %,
not less than
A8, A85, A5, AD0	Annealed	All thicknesses	All sizes	60 (6)	-	20
Negativnoe	To 2.0 incl.	80 (8)	-	4
SV. 2.0−5.0 incl.	80 (8)	-	5
AD1	Annealed	All thicknesses	All sizes	60−110 (6−11)	-	20
Negativnoe	To 2.0 incl.	110 (11)	-	4
SV. 2.0−5.0 incl.	100 (10)	-	5
AMC, AMCs	Annealed	All thicknesses	All sizes	90−135 (9−14)	-	15
Negativnoe	135 (14)	-	-
Amg0,7	Annealed	All thicknesses	All sizes	Up to 155 (16)	-	12
Negativnoe	155 (16)	-	-
Amg1	Annealed	All thicknesses	All sizes	120−175 (12−18)	-	10
Negativnoe	165 (17)	-	-
AD31	Annealed	All thicknesses	All sizes	Up to 155 (16)	-	12
Negativnoe	155 (16)	-	-
Negativnoe after quenching and naturally aged	265 (27)	245 (25)	4
Negativnoe after quenching and artificially aged	315 (32)	275 (28)	Eight
Tempered and naturally aged	174 (18)	-	13
Tempered and artificially aged	245 (25)	-	7
AV	Annealed	All thicknesses	All sizes	No more than 145 (15)	-	17
Tempered and naturally aged	205 (21)	-	14
Tempered and artificially aged	305 (31)	225 (23)	8
Negativnoe	145 (15)	-	-
D1	Annealed	All thicknesses	All sizes	Not more than 245 (25)	-	10
Tempered and naturally aged	And 1.0 incl.	To 22 incl.	375 (38)	195 (20)	13
SV. 1.0−5.0 incl.	375 (38)	195 (20)	14
And 1.0 incl.	SV. 22 to 50 incl.	390 (40)	225 (23)	12
SV. 1.0−5.0 incl.	390 (40)	225 (23)	13
All thicknesses	SV. 50	390 (40)	225 (23)	11
Negativnoe	All thicknesses	All sizes	245 (25)	-	-
1955	Annealed	All thicknesses	All sizes	Not more than 245 (25)	-	10
Tempered and naturally aged for 30−35 days	From 1.0 to 5.0 incl.	To 40 incl.	335 (34)	195 (20)	10
SV. 1.5−5.0 incl.	355 (36)	195 (20)	10
Tempered and naturally aged for 2−4 days	From 1.0 to 1.5 incl.	To 40 incl.	235 (24)	175 (18)	10
SV. 1.5−5.0 incl.	255 (26)	175 (18)	10
Negativnoe after quenching and naturally aged for 30−35 days	From 1.5 to 5.0 incl.	From 12 to 40 incl.	355 (36)	225 (23)	6
Negativnoe after quenching and naturally aged for 2−4 days	From 1.5 to 5.0 incl.	From 12 to 40 incl.	265 (27)	175 (18)	6
Negativnoe after quenching and artificially aged	From 1.5 to 5.0 incl.	From 12 to 40 incl.	375 (38)	255 (26)	10

Note. Square and rectangular tubes of alloy grade D1 of all sizes should have a tensile strength not less than 390 MPa (40 kgf/mm); yield strength not less than 225 MPa (23 kgf/mm); elongation not less than 12%.

(Changed edition, Rev. N 1, 2).

4. ACCEPTANCE RULES

4.1. Pipes take by the parties. The party should consist of pipes of the same brand of aluminium or aluminium alloy, one state, one batch of heat treatment, the same size and decorated the same document about quality that contains:

trademark or the name and trademark of manufacturer;

the name of the consumer;

brand aluminium or aluminium alloy;

the condition of the material;

the sizes of pipes;

batch number;

the weight of the party;

test results (mechanical properties only specify the maximum and minimum values);

the date of shipment;

the designation of this standard.

Allowed in the party heat-treated pipe, taken from several batches.

4.2. To determine the chemical composition of the alloying elements and main impurities — pick up two tubes, or one Bay from the party. Other impurities not determined.

Allowed the manufacturer to determine the chemical composition of the aluminum or aluminum alloy on each cast.

4.3. To check the mechanical properties of the selected pipe two pipe or one Bay from the party.

The mechanical properties of the annealed pipes made of aluminium stamps A8, A85, A5, AD0, and AD1 aluminum alloys AMC, AD31 AMCs and the manufacturer has no control.

(Changed edition, Rev. N 1).

4.3.1. If the party several tank manufacturer shall verify mechanical properties not less than two tubes from each batch.

4.4. Inspection of the geometric dimensions subjected to every pipe and every Bay.

On the manufacturer is permitted sampling, but not less than five tubes from the party.

4.5. Quality check outer surfaces subjected every pipe and every Bay.

4.6. Check the quality of the inner surface of pipes manufactured in segments, the inner diameter (side) of more than 20 mm is carried out on each tube.

Check the quality of the inner surface of pipes manufactured in segments, the inner diameter (side) of 20 mm or less is carried out not less than five tubes from the party.

Check the quality of the inner surface of pipes manufactured in the bays, carried out at two bays from the party.

4.7. Macrostructure of pipes with wall thickness more than 1.5 mm from the alloys of D1 and 1955, produced by pressing using a combined matrix, are 50% of the pipes from the party, but not less than one pipe.

4.8. At the request of the consumer the control to identify coarse grain structure (grain size) performed on samples subjected to tensile test.

Tube made in cold-worked, cold-worked after quenching and (naturally or artificially) aged state, and quenched (naturally or artificially) aged condition, monitoring to identify coarse grain structure is not exposed.

4.9. When checking for a burnout of the microstructure of the pipe to be quenched, the manufacturer selects one tube from each batch.

4.10. 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.

Allowed to carry out routine inspection of the tubes.

5. TEST METHODS

5.1. Determination of the chemical composition of aluminium conduct chemical method 25086−87 GOST, GOST 12687.1−77* — GOST 12697.12−77 or spectral method by GOST 3221−85; aluminium alloys — chemical method for the 25086−87 GOST, GOST 11739.1−90, GOST 11739.2−90, GOST 11739.3−99, GOST 11739.4−90, GOST 11739.5−90, GOST 11739.6−99, GOST 11739.7−99, GOST 11739.8−90 — GOST 11739.10−90, GOST 11739.11−98 — GOST 11739.15−99, GOST 11739.16−90 — GOST 11739.19−90, GOST 11739.20−99, GOST 11739.21−90, GOST 11739.22−90, GOST 11739.23−99, GOST 11739.24−98 or the spectral method according to GOST 7727−81.
_______________
* Probably a mistake of the original. Should read GOST 12697.1−77. — Note the CODE.

(Changed edition, Rev. N 1, 2).

5.2. Selection and preparation of samples for determining the chemical composition of the pipes is carried out according to GOST 24231−80.

5.3. Selection of samples for mechanical testing is carried out according to GOST 24047−80.

5.4. The tensile test is carried out according to GOST 10006−80.

To check the mechanical properties of each check the pipe in the longitudinal direction, cut one sample.

The test of mechanical properties of pipes of the brand 1955 quenched and naturally aged condition as well as cold-worked after quenching and naturally aged condition, the manufacturer conducts 2−4 day natural aging, and the consumer — after 30−35 days of natural aging.

5.5. Measurement of pipe diameter or side at a distance of not less than 75 mm from the end of the pipe and the wall thickness is carried out with a micrometer according to GOST 6507−90 or other tool, to ensure the necessary measurement accuracy.

Check the length of the pipes is carried out by measuring the GOST 7502−98 or metal ruler according to GOST 427−75.

(Changed edition, Rev. N 2).

5.6. The deviation from straightness of tubes check, placing the pipe on a test plate; when determining the total deviation from straightness check of the pipe hold it in position and using feeler gauges, measure the maximum distance between the plate and the pipe.

In determining deviations from straightness per 1 m to check the pipe, make a hard steel ruler 1 meter and using feeler gauges, measure the maximum distance between the line and pipe.

5.7. Inspection of the pipe surface is carried out without the use of magnifying devices.

Inspection of pipe inner surface in segments with inner diameter more than 20 mm is carried out on an illuminated screen.

The inspection of the inner surface of the pipe to the segments of an inner diameter of 20 mm or less, and pipes in coils of all diameters is carried out on samples with a length of not less than 100 mm cut in the longitudinal direction.

Inspection of the outer surface of the pipe manufactured in coils, is carried out through the external coils.

5.8. Macrostructure of pipes with wall thickness more than 1.5 mm from the alloys of D1 and 1955, produced by pressing using a combined matrix, check for cross microtemplate according to the method of the manufacturer.

5.9. The presence of coarse grain structure in the pipes is determined by the surface roughness of the samples after tensile tests. The permissible surface roughness is set by the standard, developed by the manufacturer and agreed with the consumer.

5.10. The microstructure of test pipes on a single sample cut from one tube by the method of the manufacturer.

In the presence of burnout re-control of the microstructure is not allowed.

6. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

6.1. Pipe, made in sections, round, square and rectangular tally in bundles according to GOST 9.510−93, to which is attached a label indicating: the model of the aluminum or aluminum alloy, material, dimensions, batch number and the mark of the technical control Department of the manufacturer.

The pipe, manufactured in coil bind at least three places soft aluminum wire. The coves is attached a label indicating the grade of aluminum or aluminum alloy, material, dimensions, batch number and the mark of the technical control Department of the manufacturer.

6.2. Temporary corrosion protection, packaging, transportation and storage — by GOST 9.510−93.

6.1, 6.2. (Changed edition, Rev. N 1, 2).

6.2.1. Transport marking of packages — according to GOST 14192−96 with application of additional data: names of products, of alloy grades, state material, size of pipes, lot number.

(Added, Rev. N 1. Changed the wording, Rev. N 2).

6.2.2. Marking of the pipes intended for export, is carried out in accordance with the order of foreign trade enterprises.

(Added, Rev. N 1).

APP (reference)

APP
Reference

1. Conversion factors to calculate the theoretical weight of 1 m pipe aluminium and aluminium alloys.

For aluminum of all grades		— 0,950
For the alloy grades:
AMC	— 0,958
AMCs	— 0,958
AD31	— 0,950
Amg0,7	— 0,947
Amg1	— 0,947
AD31	— 0,950
AV	— 0,947
D1	— 0,982
1955	— 0,972.

2. The average diameter is the arithmetic mean value between the maximum diameter and minimum diameter measured in the same plane perpendicular to the axis of the pipe

.

The calculated value should be within the permissible deviations.

3. The average thickness is the arithmetic mean value between the largest thickness and the smallest thickness measured in the same plane perpendicular to the axis of the pipe

.

The calculated value should be within the established tolerances.

4. Designation average diameter and average wall thickness in table.1 coincides with the nominal size.