GOST 22635-77

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  ГОСТ 22635-77

GOST 22635−77 Sheets of magnesium alloys. Specifications (with Amendments No. 1, 2)

GOST 22635−77*

Group В53

STATE STANDARD OF THE USSR

SHEETS OF MAGNESIUM ALLOYS

Specifications

Magnezium sheets.
Specifications

GST 18 2310

Date of introduction 1979−01−01

The decision of the State standards Committee of the USSR Council of Ministers dated July 26, 1977 N 1829 the introduction installed from 01.01.79

Limitation of actions taken by Protocol No. 3−93 Interstate Council for standardization, Metrology and certification

* REPRINT (July 1996) with Amendments No. 1, 2 approved in June 1983, June 1992 (IUS 9−83, 5−92)

This standard applies to sheets made of magnesium alloys MA2−1, MA2−1 p. h., MA8.

(Changed edition, Rev. N 1, 2).

1. CLASSIFICATION

1.1. As material leaves divided into:

— annealed — M;

— polunagartovannye — H2;

— without heat treatment — without additional marking.

(Changed edition, Rev. N 1).

2. ASSORTMENT

2.1. Thickness of sheets and maximum deviations in thickness depending on width shall be as specified in table.1.

Table 1

mm

Thickness	Pred. off. the thickness when the width of the sheet
500 and 600	800	1000	1200
0,6	-0,05	-0,10	-	-
0,8	-0,08	-0,12	-0,12	-0,13
1,0; 1,2	-0,10	-0,15	-0,15	-0,16
1,5	-0,15	-0,20	-0,20	-0,22
2,0	-0,24
2,5	-0,20	-0,25	-0,25	-0,28
3,0	-0,25	-0,30	-0,30	-0,33
3,5	-0,34
4,0	Mobility in soil -0,35
4,5	Mobility in soil -0,35
5,0; 5,5	-0,30	Mobility in soil -0,35	Mobility in soil -0,35	-0,36
6,0; 6,5	-0,30	-0,40	-0,40	0,41
7,0; 7,5	-0,30	-0,40	-0,40	-0,42
8,0; 8,5	Mobility in soil -0,35	-0,45	-0,45	-0,46
9,0; 9,5	Mobility in soil -0,35	-0,45	-0,45	-0,47
10,0; 10,5	-0,40	-0,50	-0,50	-0,50

2.1.1. Maximum deviations in thickness of the sheets depending on the width of the alloys MA2−1, MA2−1 p. h without heat treatment shall be as specified in table.1A.

Table 1A

mm

The thickness of the sheet	Pred. off. the thickness when the width of the sheet
800	1000	1200
8,0	+0,20	+0,20	+0,20
-0,45	-0,45	-0,46
8,5	+0,20	+0,20	+0,20
-0,45	-0,45	-0,45
9,0	+0,20	+0,20	+0,20
-0,45	-0,45	0,47
9,5	+0,20	+0,20	+0,20
-0,45	-0,45	-0,47
10,0	+0,20	+0,20	+0,20
-0,50	-0,50	-0,50
10,5	+0,20	+0,20	+0,20
-0,50	-0,50	-0,50

(Added, Rev. N 1).

2.2. The size of the sheets depending on the brand of alloy and condition of the material shall be as specified in table.2.

Table 2

mm

Grade	The condition of the material	Thickness	Width	Length
MA2−1 MA2−1 p. h. MA8	Annealed	0,6	500, 600 and 800	From 1000 to 2000
MA2−1 MA2−1 p. h. МА8	From 0.8 to 3.0 incl.	500, 600, 800, 1000 and 1200	From 1000 to 4000
SV. 3.0 to 10.5 incl.	From 1000 to 3000
MA2−1 MA2−1 p. h.	Without heat treatment	From 8.0 to 10.5	800, 1000 and 1200	From 1000 to 3000
МА8	Polunagartovannye	From 1.0 to 3.0 incl.	500, 600, 800, 1000 and 1200	From 1000 to 3500

(Changed edition, Rev. N 1, 2).

2.3. By agreement with the consumer allowed to produce leaves with intermediate sizes. The maximum deviations are taken as the nearest smaller size.

2.4. Limit deviations on width of sheets should correspond to ±10 mm.

2.5. The leaves are made of standard length or a multiple dimensional within the lengths specified in the table.2, with an interval of 500 mm.

2.6. Maximum deviations along the length of the sheets should correspond to ±15 mm.

2.7. Allowed in the party 20% of the leaves with a negative deviation from the nominal sizes of width and length not more than 10%.

At the customer’s request to produce sheets with negative deviations from the nominal dimensions for width and length are not allowed.

2.8. Theoretical weight of 1 mof the sheet given in the Appendix.

Examples of symbols:

Sheet of alloy grade МА8, annealed, thickness 1.5 mm, width 1200 mm, length 3000 mm:

Sheet МА8. M1,5х1200х3000 GOST 22635−77

The same prolongatory:

Sheet МА8. H2 1,5х1200х3000 GOST 22635−77

2.7, 2.8. (Changed edition, Rev. N 1).

3. TECHNICAL REQUIREMENTS

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

(Changed edition, Rev. N 1).

3.1.1. Sheets made from magnesium alloy with the chemical composition according to GOST 14957−76.

(Added, Rev. N 1).

3.2. Mechanical properties of the sheets shall be as specified in table.3.

3.3. The heat treatment — according to normative-technical documentation of the manufacturer, duly approved.

3.4. The leaves should be cropped from all sides.

Cut end Squareness, mm shouldn’t print the sheets for tolerances for width and length.

On the edges of cut sheets are not allowed burrs and delaminations.

3.5. The surface of the sheets must be free of cracks, flaws, tears, scuffing, delamination, captive, spots and streaks with roughness, as well as slag, flux inclusions and iron oxides.

Table 3

Grade	The condition of the material	The thickness of sheet, mm	Tensile strength, kgf/mm	The yield stress, kgf/mm	Elongation , %
not less than
MA2−1, MA2−1 p. h.	Annealed	From 0.6 to 2.5 incl.	26,0	16,0	10,0
SV. 2.5 to 10.5 incl.	26,0	15,0	8,0
MA2−1 MA2−1 p. h.	Without heat treatment	From 8.0 to 10.5	255 (26,0)	145 (15,0)	8,0
MA8	Annealed	From 0.6 to 2.5 incl.	23,0	12,0	12,0
SV. 2.5 to 10.5 incl.	22,0	11,0	10,0
Polunagartovannye	From 1.0 to 1.5 incl.	23,0	15,0	8,0
SV. 1.5 to 3.0 incl.	22,0	14,0	6,0

(Changed edition, Rev. N 2).

3.6. On the surface of the leaves allowed individual and group scratches; prints in the form of small dents and bumps, single metal and non-sunsets dots with an area of not more than 1 mm, if their number per 1 mof the sheet surface does not exceed 20 pieces; color of tint; the stripped portions of the surface sheets.

The depth of the defects should not display the sheet for the limit deviations of the thickness of the sheet.

(Changed edition, Rev. N 1, 2).

3.7. The surface of the sheets must be subjected to anti-corrosion treatment according to normative-technical documentation (NTD).

3.8. On the surface of the sheet subjected to anti-corrosion treatment, there are possible accumulations of small segregated inclusions of manganese in the form of dots with an area of not more than 1 mm. These clusters per 1 mof the sheet surface should take no more than two plots of 200 mmeach.

3.7, 3.8. (Changed edition, Rev. N 2).

3.9. Flatness of sheets (corrugation and bulge) with the free laying of the sheet on each side of the plane of the plate must correspond to the specified in table.4.

Table 4

mm

Thickness	Width	Length	The nonplanarity of the sheet, not more than
across the surface of the sheet (including the long party)	on the short sides (including the long side up to 300 mm from the corners of the sheet)
From 0.6 to 2.0 incl.	Up to 1200 incl.	Up to 4000 incl.	16	25
SV. 2.0 to 10.5 incl.	20	30

3.10. After machining and cutting of leaves the consumer on the surface and edges of the leaves should not be bundles.

4. ACCEPTANCE RULES

4.1. The leaves take parties. The party must consist of sheets of one melting, one brand of alloy, the state of the same material and the same size and decorated the same document about quality that contains:

— trademark or a trademark and the name of the manufacturer;

— the symbol;

— the batch number;

— number of sheets;

the weight of the party;

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

— date of shipment;

— the designation of this standard.

The weight of the batch is not limited.

The party can be composed of multiple trunks, provided that each melting should be monitored for compliance with the requirements of this standard.

4.2. To determine the chemical composition of a consumer selects two sheets of the party, manufacturer — a sample from each heat.

4.1, 4.2. (Changed edition, Rev. N 1).

4.3. The dimensional control subjected to each sheet.

4.4. Check the status of the surface subjected to each sheet.

(Changed edition, Rev. N 2).

4.5. Checking flatness subjected to each sheet.

4.6. To check the mechanical properties of the sheets are selected 1% of the leaves from the party, but at least one sheet from the party.

Allowed primary test of mechanical properties to expose 100% of the leaves.

(Changed edition, Rev. N 2).

4.7. (Deleted, Rev. N 2).

4.8. (Deleted, Rev. N 1).

4.9. If unsatisfactory test results of at least one of the figures, it is carried out re-tests on twice the number of samples cut from the same sheets.

When unsatisfactory results of repeated tests carried out piece-by-piece test sheets, the results of which are final.

When unsatisfactory results of the repeated tests in case of 100% primary test sheets did not bear a repetition of the tests is rejected.

The results of repeated tests are final.

(Changed edition, Rev. N 2).

4.10. (Deleted, Rev. N 2).

5. TEST METHODS

5.1. Determination of the chemical composition is carried out according to GOST 3240.0−76 — GOST 3240.21−76 host 7728−79.

5.2. The inspection of the surface of the sheets is carried out without the use of magnifying devices.

Cleaning the surface of the produce sanding paper-based grain size no larger than 10 according to GOST 6456−82 and scraper to a depth of not more than negative deviation of thickness of the sheet.

5.3. Measurement of the thickness of the sheets is carried out with a micrometer according to GOST 6507−90. Measurement of the width and length of sheets of conducting metal measuring tape according to GOST 7502−89*.
_______________
* On the territory of the Russian Federation GOST 7502−98. — Note the manufacturer’s database.

Allowed measurement of the other measuring tools to ensure accuracy of measurement.

5.2, 5.3. (Changed edition, Rev. N 2).

5.4. Measurement of the thickness of the sheets is carried out at a minimum distance of 115 mm from the vertex of the angle and not less than 25 mm from the sheet edges.

5.5. Selection of samples for tensile tests carried out according to GOST 24047−80.

Testing of mechanical properties carried out by the methods of destructive or non-destructive testing (eddy currents).

For testing of mechanical properties by the method of destructive testing of sheets with a thickness of SV 0.6 to 2.5 mm carry out tests according to GOST 11701−84 on a proportional flat samples of type I or II with 20 mm and sheets with thickness from 3.0 to 10.5 mm — test according to GOST 1497−84на proportional flat samples of type I or type II.

The estimated length of the sample () are in millimeters calculated by the formula

,

where is the calculated area of the specimen, mm.

(Changed edition, Rev. N 2).

5.5.1. The test of mechanical properties non-destructive method of control is carried out via the NTD.

(Added, Rev. N 2).

5.6. (Deleted, Rev. N 2).

5.7. For testing of mechanical properties when stretched from either end of cut sheet check one sample.

Samples for testing mechanical properties of sheets made in multiples of the length and width, taken between the two fold plates. While multiple sheets are branded.

(Changed edition, Rev. N 1).

5.8. Samples for mechanical tests are cut from sheets in the annealed or cold-worked condition in the longitudinal direction.

(Changed edition, Rev. N 1, 2).

5.9. The test of mechanical properties non-destructive eddy current conducting surface sheets or samples.

5.10. Waviness of the sheet is determined on all four edges by measuring the distance from the control plate to the lower surface of the sheet.

5.11. The bulge of the sheet lagging at any distance from the edges of the sheet and moving the sheet during rolling, is determined by NTD, duly approved.

6. MARKING, PACKING, TRANSPORTATION

6.1. On each sheet on one of the corners at a distance of not more than 20 mm from the end along the length of the sheet should be marked with indication of alloy grades, the condition of the material and the mark or stamp of the technical control Department.

The batch number is applied to 1% of leaves from the party.

Allowed by agreement between manufacturer and consumer marking indicating the batch number for 100% of the leaves.

(Changed edition, Rev. N 2).

6.2. By agreement between manufacturer and consumer on one side of the sheet surface is applied with a paint grade, the condition of the material and the thickness of the sheet with the spaced lines of no more than 250 mm.

Marking sheets used fast drying paint.

6.3. Preservation, packing, marking of shipping containers and transportation — according to GOST 9.511−93.

By agreement between manufacturer and consumer, the sheets can be supplied without preservatives.

6.4. (Deleted, Rev. N 1).

APPLICATION (reference). THEORETICAL WEIGHT of 1 square meter of the SHEET

APP
Reference

THEORETICAL WEIGHT of 1 mof SHEET

The thickness of sheet, mm	Weight of 1 mof the sheet, kg
0,6	1,074
0,8	1,432
1,0	1,790
1,2	2,148
1,5	2,685
2,0	3,580
2,5	4,475
3,0	5,370
3,5	6,265
4,0	7,160
4,5	8,055
5,0	8,950
5,5	9,845
6,0	10,740
6,5	11,635
7,0	12,530
7,5	13,425
8,0	14,320
8,5	15,215
9,0	16,110
9,5	17,005
10,0	17,900
10,5	18,795

Notes:

1. Theoretical weight of 1 mof sheet from alloys MA2−1 and MA2−1 p. h. calculated on the nominal thickness of the sheet when the density of the alloy of 1.79 g/cm.

2. To calculate the approximate theoretical weight of 1 mof sheet magnesium alloy brand МА8 should use a transfer coefficient 0,994.

3. Theoretical mass is not the basis for the delivery of the products.

(Changed edition, Rev. N 2).