GOST 7222-75

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  ГОСТ 7222-75

GOST 7222−75 Wire of gold, silver and their alloys. Technical specifications (Changes No. 1−4)

GOST 7222−75

Group В74

INTERSTATE STANDARD

THE WIRE OF GOLD, SILVER AND THEIR ALLOYS

Specifications

Wire of gold, silver and their alloys. Specifications

GST 18 6000

Date of introduction 1976−01−01

INFORMATION DATA

1. APPROVED AND promulgated by the Decree of the State Committee of standards of Ministerial Council of the USSR from 18.07.75 N 1850

2. REPLACE GOST 7222−54

3. Change No. 3 adopted by the Interstate Council for standardization, Metrology and certification (Protocol No. 12, 21.11.97)

Was the Technical Secretariat of MGS N 2693

The adoption of the changes voted:

The name of the state	The name of the national authority for standardization
The Republic Of Azerbaijan	Azgosstandart
The Republic Of Armenia	Armastajad
The Republic Of Belarus	Gosstandart Of Belarus
Kyrgyz Republic	Kyrgyzstandart
Russian Federation	Gosstandart Of Russia
The Republic Of Tajikistan	Tajikistandart
Turkmenistan	The main state inspection of Turkmenistan
The Republic Of Uzbekistan	Standards

4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

The designation of the reference document referenced	Item number
GOST 6835−2002	2.1, 3.5
GOST 6836−2002	2.1, 3.5
GOST 8273−75	5.3, 5.4
GOST 10447−93	4.3
GOST 16321.1−70	4.4
GOST 16321.2−70	4.4
GOST 17234−71	4.4
GOST 17235−71	4.4
GOST 22864−83	4.4
GOST 27973.0−88	4.4
GOST 27973.1−88	4.4
GOST 27973.2−88	4.4
GOST 27973.3−88	4.4
GOST 28353.1−89	4.4
GOST 28353.3−89	4.4

(Changed edition, Rev. N 4).

5. Limitation of actions taken by Protocol No. 5−94 of the Interstate Council for standardization, Metrology and certification (ICS 11−12−94)

6. The re-release (Oct 1998) with Amendments No. 1, 2, 3, approved in September 1985, January 1990, March 1998 (IUS 12−85, 4−90, 6−98)

The Change No. 4 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 147th St introduced on the territory of the Russian Federation from 01.09.2004

N 4 a change made by the manufacturer of the database in the text ICS N 7, 2004


This standard applies to cold drawn wire of gold, silver and their alloys for technical purposes and for jewellery.

(Changed edition, Rev. N 4).

1. ASSORTMENT

1.1. Diameter and utmost deviations round wire shall be as specified in table.1.

Table 1

mm

Wire diameter	Limit deviation
0,020	-0,004
0,025
0,030
0,036
0,040
0,045
0,050
0,055	-0,005
0,060
0,070
0,080	-0,007
0,090
0,100
0,11	-0,009
0,12
0,14
0,16	-0,010
0,18
0,20	-0,02
0,22
0,25
0,28
0,30
0,32
0,34
0,36
0,38
0,40
0,42	-0,03
0,45
0,50
0,55
0,60
0,65
0,70
0,75
0,80
0,85
0,90
0,95
Of 1.00	-0,04
1,10
1,15
1,20
1,30
1,40
1,50
1,60
1,70
1,80
1,90
Of 2.00	-0,05
2,10
2,20
2,40
2,50
2,60
2,80
Of 3.00	-0,06
3,20
3,40
3,60
3,80
Of 4.00
4,20
4,50
4,80
5,00	-0,07
5,20
5,50
5,80
6,00
6,50
7,00	-0,08
7,50
8,00
8,50
9,00
9,50
10,00

Note. Wire diameter from 0.02 to 0.05 mm are made only of gold grades Of 99.99 PLN; PLN of 99.9 and silver grades Of 99.99 MS; MS to 99.9.


(Changed edition, Rev. N 4).

1.2. Diameter and utmost deviations semicircular wire shall be as specified in table.2.

Table 2

mm

Wire diameter	Limit deviation
Of 1.00	-0,10
1,20
1,50	-0,12
Of 2.00	-0,16
2,50
Of 3.00	-0,18
3,50

1.3. Dimensions and limit deviations of the segment of wire shall be as specified in table.3.

Table 3

mm

The size of the chord		The boom
Nomin.	Pred. off.	Nomin.	Pred. off.
6,0	-0,29	2,0	-0,14
7,0	1,6
7,5	2,3	-0,18
8,0	2,3
8,5	2,8

1.4. Dimensions and limit deviations of square of wire shall be as specified in table.4.

Table 4

mm

Side of the square	Limit deviation
1,2	-0,08
1,6
2,0
2,5
2,8
3,0	-0,10
3,6
4,0
5,0

1.5. Dimensions and limit deviations of the rectangular wire shall be as specified in table.5.

Table 5

mm

Thickness		Width
Nomin.	Pred. off.	Nomin.	Pred. off.
1,5	-0,14	4,0	-0,20
1,5	4,5
1,5	5,0
2,5	6,0	-0,28

Examples of symbols:

Round wire of alloy grade Clsrm 585−80 according to GOST 30649−99, with a diameter of 3 mm, soft:

Wire cu. Clsrm 585−80 MZ GOST 7222−75

The same, semi-circular, of alloy grade is 87.5 CPM at GOST 6836−2002, 2.5 mm diameter, solid:

Wire polyr. SRM is 87.5 T2,5 GOST 7222−75

The same segment, made of alloy brand CPM 875 GOST 30649−99, with a chord of 6.0 mm, boom 2.0 mm, soft:

The same square of alloy brand CPM 90 GOST 6836−2002, with a side of a square 5 mm solid:

The same, rectangular, silver brand SR 99,9 GOST 6836−2002, thickness 2.5 mm, width 6.0 mm, hard:

(Changed edition, Rev. N 4).

1.6. Soft wire is made of a minimum diameter of 0.2 mm.

(Added, Rev. N 1).

2. TECHNICAL REQUIREMENTS

2.1. The wire of gold, silver and their alloys must be manufactured in accordance with the requirements of this standard for technological regulations approved in the prescribed manner.

(Added, Rev. N 1).

2.1. Chemical composition of wire for technical purposes must comply with GOST and GOST 6835−2002 6836−2002 for jewelry production — GOST 30649−99.

(Changed edition, Rev. N 4).

2.2. As the material, the wire is supplied rigid (hard) or soft (annealed).

The condition of the material should be specified in the order. If the order specifies the condition of the material, the wire is supplied in solid (cold-worked) condition.

(Changed edition, Rev. N 1).

2.3. The surface of wire should be clean, without foreign inclusions, captivity, cracks, cavities, delaminations, and dents. On the surface of the wire are not allowed vices, bringing the wire at reference sweep for tolerances for dimensions. Allowed on the wire surface for the local darkening and color of tint, with the exception of wire of gold grades 99,99 Zl; Zl is 99.9.

(Changed edition, Rev. N 1, 4).

2.4. Soft wire diameter from 0.2 to 4 mm should not break or split when wrapped 10 turns on a mandrel equal to twice the diameter of the tested wire.

2.5. Wire of diameter 0.60 mm and less shall be wound into a coil, and a diameter of more than 0.60 mm rolled coils in series, providing free spooling.

Delivery wire with a diameter of 0.50 mm and 0.55 mm in coils.

The ends of the wire in coils and reels must be secured by the end of the wire of the same coil or coils.

(Changed edition, Rev. N 1, 3).

2.6. Each coil or coil consists of a single segment wire.

2.7. Weight of wire on a reel or on a spool provided in Appendix 1.

2.8. Mechanical properties of the wire are given in Appendix 2.

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

2.9. The properties of the alloys jewelry destination specified in GOST 30649−99.

(Added, Rev. N 4).

3. ACCEPTANCE RULES

3.1. Wire take parties. The party should consist of wire of the same size; one brand of metal, alloy; one state of material to be furnished by a single document about quality that contains:

trademark or the name and trademark of manufacturer;

symbol wire;

the condition of the material;

the weight of the batch, g;

chemical composition;

the number of melt or party;

the date of issue;

stamp of technical control.

(Changed edition, Rev. N 1, 3).

3.2. Checks weight of each packing unit is held in the balance according to GOST 24104−2001 in accordance with the order of accounting and storage of precious metals, established by the appropriate national authority.

(Deleted, Rev. N 1. Introduced later, Rev. N 4).

3.3. Quality control of wire for compliance with the requirements of PP.1.1−1.6 and 2.3 shall be subject to 100% skeins or coils of the party.

(Changed edition, Rev. N 1).

3.4. To check the wire according to claim 2.4 from each party select three samples from different skeins or coils.

3.5. Determination of the chemical composition for compliance with GOST 6835−2002,GOST 6836−2002 or GOST 30649−99 produce two spools or coils of the party.

The manufacturer is allowed to determine the chemical composition of samples taken from the molten metal or the ingot.

(Changed edition, Rev. N 1, 4).

3.6. If unsatisfactory validation results according to claim 2.4 a second check for twice the number of reels or coils selected from the same batch.

The results of the repeated checking are final and apply to the entire party.

4. TEST METHODS

4.1. Inspection of the wire for compliance with the requirements of section 2.3 is produced without the use of magnifying devices.

Wire of gold grades Of 99.99 PLN; PLN of 99.9 and silver grades Of 99.99 CP; CP is 99.9 0.8 mm diameter and less visible with increasing 7.

(Changed edition, Rev. N 4).

4.2. Measuring the size of wire produced on the segment of length not less than 1 m at three points tool to ensure appropriate accuracy.

4.3. Check the wire for compliance with the requirements of section 2.4 is produced according to GOST 10447.

Inspection of the wire surface after the test is performed at increasing 7.

4.4. Determination of the chemical composition is carried out according to GOST 27973.0 — 27973.3 GOST, GOST 28353.1, 28353.3 GOST, GOST 16321.1, 16321.2 GOST, GOST 17234, 17235 GOST, GOST 22864или other methods providing the required accuracy.

If there is disagreement in the assessment of the chemical composition chemical composition is determined by GOST 27973.0 — 27973.3 GOST, GOST 28353.1, 28353.3 GOST, GOST 16321.1,16321.2 GOST, GOST 17234, 17235 GOST and GOST 22864.

(Changed edition, Rev. N 1, 2).

5. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

5.1. (Deleted, Rev. N 1).

5.2. On each reel or attached to ball tag must be specified:

a) name or trademark of the manufacturer;

b) grade;

C) the size of the wire;

g) the batch number.

5.3. Coils or coil wrapped with paper according to GOST 8273, placed in boxes made according to normative-technical documentation, or placed between the plywood strips, wrapping paper according to GOST 8273, and Packed in cloth bags.

(Changed edition, Rev. N 1).

5.4. Coil with wire diameter less than 0.1 mm is placed in an individual container made according to normative-technical documentation, and Packed in boxes so as to exclude the possibility of movement during transportation. The boxes are wrapped in paper according to GOST 8273 and placed in cloth bags.

It is allowed to apply a different method and packing material, ensuring the safety of wire during the transportation and storage.

(Changed edition, Rev. N 1, 3).

5.5. On each bag, attach a label indicating:

value of the parcel;

names consumer;

net mass;

gross mass;

numbers of the package;

the numbers of the registry;

index of persons responsible for the packing;

the name of the manufacturer.

(Changed edition, Rev. N 1).

5.6. The gross mass of the packing space should not exceed 10 kg.

5.7. (Deleted, Rev. N 1).

5.8. Bags should be sealed by the manufacturer.

(Changed edition, Rev. N 1).

5.9, 5.10. (Deleted, Rev. N 1).

5.11. Accounting, storage and transportation of wire of gold, silver and their alloys is carried out in the manner prescribed for the registration, storage and transportation of precious metals.

(Changed edition, Rev. N 1).

ANNEX 1 (mandatory)

ANNEX 1
Mandatory

Dimensions, mm	Weight of wire on a reel or spool, g, not less
Normal	Reduced
0,02−0,055	1	0,3
0,06−0,10	2	1,0
0,11−0,20	5	2,0
0,22−0,40	15	8,0
Of 0.42 to 1.00	50	25,0
1,10−2,00	150	70,0
2,10−10,00	300	150,0

Notes:

1. Allowed to have coils or coils with a reduced weight of not more than 15% of the batch weight.

2. At the customer’s request allowed the presence of wire in coils or on reels of smaller mass.


(Added, Rev. N 1).

ANNEX 2 (informative). MECHANICAL PROPERTIES OF WIRE MADE OF GOLD AND SILVER AND THEIR ALLOYS

ANNEX 2
Reference

The grade of metal or alloy	The condition of the material
Solid	Soft
Rupture strength, kgf/mm, not less	Rupture strength, kgf/mm, not less	Elongation, %, not less
99,99 Zł; PLN 99,9	20	12	10
Clsrm 58,5−8	80	45	35
To 99.99 MS; MS To 99.9	26	16	27
SRM 96	40	25	25
SRM 92,5	35	25	20
SRM 91,6	35	25	20
SRM 90	35	25	20
SRM is 87.5	35	25	20
Srpl 88−12	40	20	18
SRAP 80−20	40	25	30

Note. Determination of mechanical properties were conducted on the wire diameter: 0.8−4.0 mm, and for grades 88−12 Srpl and SRAP 80−20 wire with a diameter of 0.04−10 mm.


(Changed edition, Rev. N 4).