GOST 11070-74

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  ГОСТ 11070-74

GOST 11070−74 Ingots primary aluminium. Technical specifications (with Changes N 1−7)

GOST 11070−74

Group W51

INTER-STATE STANDARD OF THE USSR

PRIMARY ALUMINIUM INGOTS

Specifications

Primary aluminium ingots.
Specifications

ISS 77.120.10
GST 17 1212

Date of introduction 1975−01−01

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of nonferrous metallurgy of the USSR

2. APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from 22.01.74 N 204

Change No. 7 adopted by the Interstate Council for standardization, Metrology and certification (Protocol No. 20 dated 01.11.2001).

For making changes prgolosoval:

3. REPLACE GOST 11070−64

4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

5. The expiration time limit is removed by the Resolution of Gosstandart No. 273 dated 26.03.92

6. EDITION Changes N 1, 2, 3, 4, 5, 6, 7, approved in August 1975, January 1980, October 1984, may 1987, September 1988, March 1992, may 2002 (IUS 9−75, 3−80, 2−85, 8−87, 1−89, 6−92, 8−2002)


This standard applies to primary aluminium ingots of all grades and high technical purity, intended for remelting.

The requirements of this standard, in addition to 1.1 and are mandatory.

(Changed edition, Rev. N 5, 6).

1. THE SHAPE AND SIZE

1.1. Form, mass, geometrical dimensions of the pigs are determined by the contract between the consumer and the manufacturer.

Dimensions and weight of pigs (hell.2−5 and table) are given for design and manufacturing of molds.

Damn.2*

________________
* Hell.1 (Deleted, Rev. N 3).

Damn.3

Damn.4

Damn.5


Dimensions, mm

(Changed edition, Rev. N 3, 4, 7).

1.1 a. By agreement with the consumer it is allowed manufacture of large ingots, shape and weight which meet the requirements of GOST 9498, GOST 19437, as well as other size, shape and weight, not to exceed the specified in the standards.

(Added, Rev. N 6).

2. TECHNICAL REQUIREMENTS

2.1. Ingots are made in accordance with the requirements of this standard technological instruction, duly approved.

The chemical composition of the ingots shall conform to the requirements of GOST 11069 and of this standard.

(Changed edition, Rev. N 3, 7).

2.2. On the surface of the ingots should not be slag and other foreign inclusions. Cracks wider than 1 mm must be scored. Requirements for other surface defects established by agreement between the consumer and the manufacturer.

(Changed edition, Rev. N 7).

2.2 and 2.3. (Deleted, Rev. N 7).

2.4, 2.4.1, 2.4.2. (Deleted, Rev. N 4).

2.5. Ingots of aluminium of technical purity according to GOST 11069 for the production of deformed semi-finished products is made with the ratio of the mass fraction of impurities of iron to silicon of at least 1.2:1,0. To the designation of the brand of such a metal is added the letter N, when the colored marking is added oblique stripe of the same color as the vertical stripes.

(Added, Rev. N 7).

2A. SAFETY REQUIREMENTS

2A.1. Aluminium in the form of ingots of low-toxicity, fire and explosion.

2A.2. Aluminium is one of the substances of the 3rd hazard class according to GOST 12.1.007, GOST 12.1.005 and when exposed to the body is moderately dangerous substance predominantly fibrogenic action. Inhalation of fumes and dust of aluminium can affect the upper respiratory tract and lungs to get irritated mucous membranes of the nose, mouth, eyes, and also to develop eczema and dermatitis.

The maximum permissible concentration of aerosols of aluminium in workplace air (TLV) 2 mg/m.

2A.3. Aluminium in ingots, conductive, you should avoid contact of the product with the wires under voltage.

2A.4. In terms of production must comply with the rules of General and personal hygiene and safety, avoid inhalation of dust and vapors of the molten metal, contact with eyes and skin. When you work should use personal protective equipment: respirators — according to GOST 12.4.028, dust-proof clothing — 12.4.099 GOST and GOST 12.4.100, points — according to GOST 12.4.013*. To work with ingots of aluminum in paragraphs prolonged storage the use of special means of protection are required.
_______________
* On the territory of the Russian Federation acts GOST R 12.4.013−97**.

** From 1 July 2008 on the territory of the Russian Federation GOST R 12.4.230.1−2007. — Note the manufacturer’s database.

During remelting ingots or recycling should be ensured drying of pigs, ingots and waste aluminium before loading into the melting furnace.

2B. REQUIREMENTS OF ENVIRONMENTAL PROTECTION

2B.1. Under normal conditions of storage and transportation of aluminium in the form of ingots and bars will not have negative impact on the environment.

2B.2. Harmful effects on the environment may occur as a result of discharges and emissions of polluting substances in the production process in emergency situations (fire, explosion, flood).

When injected aluminium in the form of ingots and ingots into water, when exposed to aggressive substances (acid, lye) possible leaching of aluminium with the formation of aluminates, which has toxic impact on flora and fauna.

2B.3. The average daily maximum permissible concentration in air of populated areas (MPC) of aluminium is not regulated, aluminum oxide (in terms of aluminum) is 0.01 mg/m.

The maximum allowable concentration of aluminium in water of water objects of drinking and cultural-domestic use (MPC) — 0.5 mg/L.

The maximum allowable concentration of aluminium in water of fishery water bodies (MPC) is 0.04 mg/L.

2B.4. Substandard products and waste must return in manufacturing (remelting).

Sec. 2A, 2B. (Added, Rev. N 7).

3. ACCEPTANCE RULES

3.1. Pig apply to the acceptance of the parties. The party should consist of ingots of one size and of aluminium to one brand, of one or more heats and be accompanied by a document about quality that contains:

trademark or the name and trademark of manufacturer;

brand of aluminium;

rooms heats;

batch number;

the weight of the batch;

the results of the determination of the chemical composition of each heat;

the designation of this standard.

(Changed edition, Rev. N 3, 7).

3.2. Control of chemical composition, surface quality and internal defects subjected to three ingots from each batch of pigs weighing 15 kg, one pig from each batch of large pigs.

To control the chemical composition of the plant sampled from each heat of molten metal.

Control of internal defects of ingots is carried out at the request of the consumer.

(Changed edition, Rev. N 4, 5).

3.3. (Deleted, Rev. N 7).

3.4. If unsatisfactory test results of at least one of the indicators it is carried out re-testing at twice the sample. The results of repeated tests apply to the entire party.

(Changed edition, Rev. N 3).

4. TEST METHODS

4.1. Control of surface quality is performed by visual inspection without the use of magnifying devices.

4.1. To check the height of the nodules of pigs, manufactured by the devil.5, as well as ingots in the form set out in GOST and GOST 9498 19437, use gauges according to GOST 162или the depth indicator according to GOST 7661−67. To check the length Nikitin use measuring metal tape measure according to GOST 7502. To check crack width is used, the probes on the other 2−034−225.

Allowed the use of other measuring tools that provide appropriate precision.

4.2. Selection and preparation of samples for the determination of chemical composition is carried out according to GOST GOST 24231или 3221. Drilling of large ingots is carried out in at least three points, evenly spaced diagonally larger surface pig, to a depth of not less than 30 mm. the diameter of the drill should be not more than 30 mm. of the point of entry of the drill should be ground to a depth of not less than 0.5 mm.

Chemical composition of aluminium is determined according to GOST 25086, 12697.1 GOST — GOST 12697.12, 3221 GOST, GOST 23189.

Allowed to analyze using other methods of equal accuracy standard.

The differences in the evaluation of the chemical composition analysis is carried out according to GOST 25086, 12697.1 GOST — GOST 12697.12, 3221 GOST, GOST 23189.

4.1 and 4.2. (Changed edition, Rev. N 5).

4.3. Control of internal defects of ingots with a mass of 15 kg is carried out on macrosections of cross-templates pigs. Template needs to be cut out ¼−½ of the length from the end face of a pig with a thickness of 15−30 mm.

For the manufacture of macrosections template machine. The surface roughness should be not more than 20 µm according to GOST 2789.

Etched macrosections spend 10−20% sodium hydroxide solution for 10−20 min before the detection of the structure at room temperature not below 15 °C. After etching, the surface is washed thoroughly with water and bleached 25−50% nitric acid solution to remove dark plaque with subsequent washing in water. Inspection of macrolife carried out without the use of magnifying tools.

The procedure for the control of large ingots for internal defects established by agreement between manufacturer and consumer.

(Changed edition, Rev. N 3, 4).

4.4. (Deleted, Rev. N 7).

5. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

5.1. Each pig must be marked with:

a) trademark or mark and the name of the manufacturer;

b) the number of melt is applied with a metal stamp, character height should not be less than 10 mm;

C) grade of aluminium is applied at the end of a dye in accordance with GOST 11069.

Large ingots indelibly mark the weight of a pig.

By agreement with consumer it is allowed in the package to 20% of pigs without heat number, subject to a package of ingots of one heat.

When transporting pigs in batches, the customer is allowed to apply a color marking on the ends of the pigs only the top row of the package.

(Changed edition, Rev. N 3, 7).

5.2. Pig, made by the devil.2−4, transporterowych in packages in accordance with GOST 21399 with strapping not less than two belts. Each belt consists of two strands of aluminum wire rod with a diameter of not less than 9 mm according to GOST 13843, or other normative and technical documentation or annealed steel wire in diameter not less than 6 mm according to GOST 3282. The mass of the aluminum rod used for the strapping of packages included in the net weight of the package and the party.

As means for bonding is allowed to use steel packing tape according to GOST 3560, GOST 4986 or other regulatory-technical documentation.

Funds of the bond must ensure the safekeeping of the integrity of the package during transportation, storage and loading and unloading and does not serve a packet capture while loading and unloading.

Pig, made by the devil.5, transporterowych unpacked. Pig, made in the form 9498 GOST and GOST 19437, transporterowych in accordance with GOST and GOST 9498 19437. Large ingots of other sizes, shapes and weights transporterowych in accordance with normative-technical documentation.

(Changed edition, Rev. N 3, 4, 5, 6, 7).

5.3. Transport marking of pigs — according to GOST 14192. Transport marking of large ingots is applied to one of the end parts of the pig. Labelling of products intended for export, is carried out in accordance with the order of foreign trade enterprises.

When transporting pigs direct rail carload shipments of transport have to be marked not less than four places (except mass). On the other truck places the mass of the package is indicated with indelible paint on one of the ingots of the top row.

For overpacks transported in open rolling stock, causing a handling mark «sling here».

(Changed edition, Rev. N 3, 4, 7).

5.4. Packs pigs for long-term storage label according to GOST 21399.

(Changed edition, Rev. N 3).

5.5. Pig transporterowych rail, Maritime and road transport in accordance with cargo carriage regulations applicable to transport of this species.

Rail packages transporterowych pigs in covered wagons in accordance with GOST 21399.

Allowed by agreement between manufacturer and consumer packages transportation of pigs on the open rolling stock.

Large pig transportyour on the open rolling stock.

Stowage and securing of cargoes transported by rail, must comply with the technical conditions of loading and fastening of cargoes.

Transportation of pigs by sea transport in accordance with GOST 26653.

(Changed edition, Rev. N 3, 4, 7).

5.6. Ingots primary aluminium is stored in covered warehouses. Ingots of aluminium of technical purity can be stored on open platforms.

(Changed edition, Rev. N 3).