GOST 4784-97

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  ГОСТ 4784-97

GOST 4784−97 Aluminum and aluminum deformable alloys. Stamps (with Amendments No. 1, 2, 3, as Amended)

GOST 4784−97

Group W51

INTERSTATE STANDARD

ALUMINUM AND ALUMINUM DEFORMABLE ALLOYS

Brand

Aluminium and wrought aluminium alloys. Grades

ISS 77.120.10
GST 17 340

Date of introduction 2000−07−01

Preface

1 DEVELOPED by JSC «Russian Institute of light alloys» (VILS), the Interstate technical Committee MTC 297 «Materials and semi-finished products from light and special alloys"

INTRODUCED by Gosstandart of Russia

2 ADOPTED by the Interstate Council for standardization, Metrology and certification (minutes No. 12 dated November 21, 1997)

The adoption voted:

The change in N 1 taken by the Interstate Council for standardization, Metrology and certification (Protocol No. 23 dated 22 may 2003)

For the adoption of the changes voted by national standardization bodies of the following States: AZ, AM, BY, GE, KZ, KG, MD, RU, TJ, TM, UZ, UA [codes alpha-2 at MK (ISO 3166) 004]

3 In tables 1 to 6 present the brand and the chemical composition of aluminium and aluminium alloys with the requirements of international standard ISO 209:2007* «aluminum and aluminum alloys. Chemical composition».
________________
* Access to international and foreign documents referred to here and hereinafter, can be obtained by clicking on the link to the site shop.cntd.ru. — Note the manufacturer’s database.

(Changed edition, Rev. N 2).

4 Resolution of the State Committee of the Russian Federation for standardization and Metrology dated December 8, 1998 No. 433 inter-state standard GOST 4784−97 introduced as the national standard of the Russian Federation from July 1, 2000.

5 REPLACE GOST 4784−74

6 EDITION (August 2009) Change 1, approved in November 2003 (IUS 2−2004), Amended (ICS 11−2000, 5−2004, 4−2005)


MADE: Change N 2, approved and promulgated by the Order of Rosstandart on 22.11.2013 N 2030-St c 01.09.2014; Amendment No. 3, approved and put into effect by the Order of Rosstandart on 03.08.2015 N 1061-St c 01.02.2016

Change N to 2, 3, made by the manufacturer of the database in the text ICS N 7, 2015, IUS N 11, 2015

AMENDED, published in IMS No. 5, 2004, amendment published in IMS No. 4, 2005, amendment published in IUS N 2, 2016

The amendments made by the manufacturer of the database

1 Scope

This standard applies to aluminum and wrought aluminum alloys intended for the manufacture of semi-finished products (strips in coils, sheets, circles, discs, plates, strips, bars, rods, profiles, tires, tubes, wire, forgings and forged forgings) by hot or cold deformation, as well as slabs and ingots.

2 Normative references (excluded)

________________
* Excluded Mod. N 2.

3 General requirements

Brand and chemical composition of aluminium shall be as specified in table 1.

3.1 the Ratio of iron and silicon in aluminum should not be less than one.

(Changed edition, Rev. N 1).

3.2 Brand and chemical composition of aluminium alloys of aluminium-copper-magnesium and aluminum-copper-manganese shall be as specified in table 2.

(Changed edition, Rev. N 1; Amendments IUS 11−2000, 5−2004).

3.3 Brand and chemical composition of the aluminum alloy system aluminum-manganese shall be as specified in table 3.

(Changed edition, Rev. N 1).

3.3.1 the Ratio of iron and silicon in the alloy AMCs must be greater than unity.

3.4 Brand and chemical composition of the aluminium alloy of system aluminium-magnesium shall be as specified in table 4.

3.4.1 Amg2 alloy grade for the manufacture of tape used as a packaging-packaging in the food industry, the mass fraction of magnesium should be from 1.8 to 3.2%.

3.5 Brand and chemical composition of the aluminium alloy of system aluminium-magnesium-silicon shall be as specified in table 5.

(Changed edition, Rev. N 1; Amendment IUS 11−2000).

3.6 Brand and chemical composition of the aluminum alloys of the system aluminum-zinc-magnesium shall be as specified in table 6.

(Changed edition, Rev. N 1).

3.7 In aluminium and aluminium alloys listed in tables 1−6, permitted partial or complete replacement of titanium with boron or other modifying additives, providing fine-grained structure.

3.8 In aluminum and aluminum alloys, semi-finished products of which are used in the manufacture of food purposes, the mass fraction of lead should not be more than 0.15%, arsenic — not more than 0,015%.

Brand of aluminum and aluminum alloys, food grade additionally marked with letter «W».

(Changed edition, Rev. N 1).

3.9 Chemical composition of alloys D1, D16, AMg5 and V95 for the manufacture of wire for cold heading shall be those specified in table 7. This brand is additionally marked with the letter «P».

3.10 Brand and the chemical composition of aluminium and aluminium alloys intended for the manufacture of welding wire shall be as specified in table 8.

Brand and chemical composition of the aluminum alloys of the system aluminum-silicon shall be as specified in table 9.

(Amendments I & C 11−2000, 4−2005); (Revised edition, Edit. N 2).

3.11 the content of the items in tables 1−9 maximum, unless specified limits.

3.12 Chemical composition of aluminium and aluminium alloys in tables 1−9 is given in mass percent. The estimated value or the value obtained from the analysis are rounded in accordance with rounding rules, given in Appendix A.

3.11, 3.12 (Revised edition, Edit. N 2).

3.13 In the column «other items» includes items whose content is not represented, as well as elements not listed in tables.

3.14 (Deleted, Rev. N 3).

3.15 the Mass fraction of beryllium, boron and cerium are burden calculation are defined, and are provided with production technology.

(Changed edition, Rev. N 2).

3.16 the Contents of other elements do not determine (provided by production technology). The contents of each of the other elements and the sum of them in protocols of chemical analysis not specified.

(Changed edition, Rev. N 3).

Table 1 — Aluminium

(Changed edition, Rev. N 2).

Table 2 — Aluminium alloys, aluminium-copper-magnesium and aluminum-copper-manganese

(Changed edition, Rev. N 2, 3).

(Amendment. ICS N 2−2016).

Table 3 — Aluminum alloy system aluminum-manganese

(Changed edition, Rev. N 2).

Table 4 — Aluminum alloy system aluminum-magnesium

(Changed edition, Rev. N 2, 3).

Table 5 — Aluminium alloys aluminium-magnesium-silicon

(Changed edition, Rev. N 2).

Table 6 — Aluminum alloy system aluminum-zinc-magnesium

(Changed edition, Rev. N 2).

Table 7 — Alloys for the manufacture of wire for cold heading

(Changed edition, Rev. N 3).

Table 8 — Alloys for the manufacture of welding wire

(Changed edition, Rev. N 3).

Table 9 — Aluminum alloys of the aluminum-silicon

(Added, Rev. N 2).

Annex a (informative). Rounding rules

APPENDIX A
(reference)

A. 1 Rounding is a drop of significant digits to the right up to a certain discharge with possible changes in the numbers of this category.

Example: the number of 132.48 Rounding to four significant digits is 132,5.

A. 2 In case the first of the discard digits (counting from left to right) is less than 5, the last digit retained is not changed.

Example: 12,23 Rounding numbers to three significant digits yields of 12.2.

A. 3 In case of cast the first digit (counting from left to right) is equal to 5, the last digit retained is increased by one.

Example: 0,145 round a number to two significant digits yields of 0.15.

Note — In cases when it is necessary to take into account the results of previous approximations, proceed as follows:

— if the cast figure was the result of a previous rounding up, then the last stored digit is saved.

Example: Rounding to one significant digit in the number of 0.15 (obtained after rounding number 0,149) gives 0,1;

— if the cast figure was the result of a previous rounding down, then the last remaining digit is increased by one (with rollover, if necessary, to the next level).

Example: Rounding of numbers at 0.25 (obtained from the previous round to 0.25) gives 0,3.

A. 4 if the first discard digits (counting left to right) greater than 5, then the last stored digit is incremented.

Example: Rounding numbers 0.156 to two significant digits yields of 0.16.

A. 5 Rounding should be performed until the desired number of significant digits, not in stages.

Example: Rounding numbers 565,46 to three significant figures is made directly to the 565.

Rounding in stages would:

at the first stage to 565,5;

phase II of the to 566 (wrongly).

A. 6 Integers are rounded according to the same rules as decimal.

Example: 12456 round a number to two significant digits gives 12·10.