GOST 26271-84

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  ГОСТ 26271-84

GOST 26271−84 cored Wire for arc welding of carbon and low-alloy steels. General specifications (with Change No. 1)

GOST 26271−84

Group В05

STATE STANDARD OF THE USSR
CORED WIRE FOR ARC WELDING
CARBON AND LOW ALLOY STEELS

General specifications

Flux-cored wire welding carbon and low-alloy steels.
General specifications

OKP 12 7400

Date of introduction 1987−01−01

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Academy of Sciences of the Ukrainian SSR Ministry of ferrous metallurgy of the USSR

DEVELOPERS:

V. K. Lebedev, Acad. USSR; by I. K. pokhodnya, academician. Ukrainian Academy of Sciences; I. I. Shubin, A. M. Suptel, PhD. tech. Sciences; V. N. Shlepakov, PhD. tech. Sciences; K. T. Zalyalyutdinov, PhD. tech. Sciences; V. G. Wilde, V. P. Packin

2. APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from 07.09.84 N 3154

3. INTRODUCED FOR THE FIRST TIME

4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

5. The expiration time limit is removed by the Resolution of Gosstandart of the USSR from 27.08.91 N 1395

6. REPRINT (December 1993) with amendment No. 1, approved in August 1991 (IUS 11−91)

This standard applies to cored wire for arc welding of carbon and low alloy steels with a temporary tear resistance up to 900 MPa.

1. CLASSIFICATION AND ASSORTMENT

1.1. Under the terms of the use of cored wire is divided into gas-protective (GHG), used for welding in carbon dioxide or gas mixtures, self-shielding (SS) welding which is carried out without additional protection.

1.2. In accordance with the allowable position of welding and the conditions of formation of the weld wire is divided into:

for the lower N;

for the bottom, horizontal (on a vertical plane) — G;

for the bottom, horizontal, vertical;

for all;

for horizontal forced the formation of a — GP;

for the vertical forced the formation of — VP;

for all positions using a forced formation — up.

1.3. In accordance with the value of the yield strength of the weld metal cored wire is divided into the types listed in the table. 1.

Table 1

Note. Values for type D are specified in normative and technical documentation on a particular brand of wire.

1.4. In accordance with the temperature test, which provides the toughness of the weld metal is not less than 35 j/cm, flux-cored wire is divided into levels listed in the table. 2.

Table 2

Note. Value for level R specified in the normative-technical documentation.

1.5. In accordance with the chemical composition of the deposited metal in terms of carbon, phosphorus and sulfur cored wire is divided into categories A, b, C (see table. 5).

1.6. The diameter of the cored wire and the permissible limit of deflection at the size shall be as specified in table. 3.

Table 3

Note. By agreement with the consumer it is allowed manufacture of wire with an intermediate value of the diameter. The maximum deviation must be less than the allowable for the next larger set value of the diameter.

Legend flux-cored wires are filled under the scheme:

The designation mark of wire should start at index «PP» (wire and powder), after which a hyphen are numeric or alphanumeric designation indicating the cipher registration of welding material is adopted in the industry of the developer.

Example of designation cored wire brand PP-ANZ with a diameter of 3.0 mm, self-shielded (SS), the value of the yield strength of the weld metal of type 44, the chemical composition of weld metal And to ensure the toughness of the weld metal of not less than 35 j/cmat a temperature of minus 20 °C (2), for welding in the bottom position (N):

PP-АНЗ3,0 PS 44-А2Н GOST 26271−84

1.3−1.6. (Changed edition, Rev. N 1).

2. TECHNICAL REQUIREMENTS

2.1. Cored wire shall be manufactured in accordance with the requirements of this standard for technological regulations approved in the prescribed manner.

2.2. Cored wire consists of a shell and a powder filler. Brand of wire, its structure, chemical composition and properties of the shell and powder filler are established by normative-technical documentation.

(Changed edition, Rev. N 1).

2.3. The surface of the wire must be without dents, tears, without signs of corrosion, oil and other contaminants. Longitudinal risk and allowed traces of drawing lubricant.

2.4. All the components, filling the cored wire, evenly, without gaps distributed throughout the length of the wire so that the welding-technological properties of the wire and the properties of the weld metal and weld metal as the application of the wire during the welding process meets the requirements of normative-technical documentation on a particular brand of wire.

2.5. The nominal value of fill factor (the ratio of the mass of powder filler to the weight of the wire, expressed in percent, and the value of its marginal deviations are specified in normative and technical documentation on a particular brand of wire.

2.6. Welding-technological properties of the wire check a surfacing roller on the plate and weld or t-butt joints.

On the surface of the roller or welded joint is not permitted pores and cracks. The size and number of allowable internal defects in any part of the weld length of 100 mm shall be as given in table. 4.

Table 4

Note. The size and number of allowable internal defects of the type D are specified in normative and technical documentation on a particular brand of wire.

2.4−2.6. (Changed edition, Rev. N 1).

2.7. The chemical composition of the deposited metal in terms of carbon content, sulphur and phosphorus, the wire needs to ensure that the contents of these impurities are shown in table. 5. The content of other chemical elements in the deposited metal and tolerances on the content of each chemical element are regulated by normative-technical documentation for a particular brand of wire.

Table 5

2.8. The mechanical properties of the weld metal in accordance with the type and level of the wire are shown in table. 1 and 2.

By agreement with the consumer allowed to test the weld metal toughness at 20 °C provided the parameters at low temperatures.

2.9. Cored wire is wound on a coil according to GOST 25445−82 in Hanks or coils. Each skein must consist of one cut of wire, coiled separatornyi rows and tightly linked thus to avoid loosening or unwinding roll. The outer end of the wire must be easy to find. The size and weight of the skeins are shown in table. 6.

Table 6

By agreement with the consumer allowed to wind wire on a coil made according to normative-technical documentation.

2.8; and 2.9. (Changed edition, Rev. N 1).

2A. SAFETY REQUIREMENTS AND ENVIRONMENT PROTECTION

2A.1. In the manufacture of cored wires, providing optimal working conditions for working should be carried out in accordance with «Sanitary rules for the enterprises for manufacture of welding materials (electrodes, cored wires, and fluxes)» N 1451, approved by the USSR Ministry of health.

2A.2. The list of ingredients included in the composition of the powder filler wires, with indication of their sanitary-hygienic characteristics (MPC, hazard class and nature of influence on an organism of harmful substances) is contained in normative-technical documentation on a particular brand of wire.

2A.3. Flux-cored wire during storage must not be the generation of toxic substances and other harmful factors. Of emissions of harmful substances from their surface is not allowed.

2A.4. Welding cored wires is accompanied by dangerous and harmful production factors:

air pollution welding spray;

light emission in the ultraviolet, visible and infrared (heat) spectrum;

spray molten metal;

a dangerous level of voltage in an electrical circuit in the workplace, the circuit which might occur through the human body.

2A.5. When using flux-cored wire ensuring the optimal working conditions of welders shall be in accordance with GOST 12.3.003−86 «Sanitary rules of organization of technological processes and hygienic requirements to production equipment» N 1042 and «Sanitary rules during welding, surfacing and cutting of metals» No. 1009, Ministry of health of the USSR.

2A.6. The gross discharge of solid and gas components of welding aerosol (specific allocation and the intensity of their education) that is defined by the maximum mode of welding is established by the normative-technical documentation for each grade of wire.

2A.7. Chemical composition of solid and gas components of welding aerosol is indicated in the normative-technical documentation on a particular brand of wire.

2A.8. Definition hazardous substances in welding aerosol (solid phase and gases) is carried out in accordance with the requirements of «Methodological instructions on determination of harmful substances in welding aerosol solid phase and gases» N 4945 of the Ministry of health of the USSR.

The maximum permissible concentration (MPC) of harmful substances in the air of working zones, the hazard class of these substances, and the nature of their impact on the body shall conform to the requirements of GOST 12.1.005−88.

2A.9. The data given in the normative-technical documentation on a particular brand of wire in accordance with the PP. 2A.6 and 2A.8 of this standard must be the basis for the calculations required General ventilation in workshops and on sites welding in accordance with «Sanitary rules during welding, surfacing and cutting of metals» No. 1009, Ministry of health of the USSR, select the required devices for local ventilation in accordance with normative-technical documentation on the design of local exhaust devices to the equipment for welding and cutting of metals, duly approved, or a burner having a device for suction of the welding zone of harmful substances, and the use of appropriate personal respiratory protection (RPD).

2A.10. The required quality of the air environment in the working zone of the welder depending on the level of pollution is achieved through the use of General ventilation, local exhausts or burners with integrated suction for respiratory protection in accordance with normative-technical documentation on the use of personal respiratory protection. The RPD must comply with GOST 12.4.034−85.

2A.11. To protect workers from welding arc radiation in the visible, ultraviolet and infrared region must be used shields welder according to GOST 12.4.035−78 with protective filters for OST is 21−6. Protection from thermal (infrared) radiation must comply with the requirements of GOST 12.4.123−83.

2A.12. Overalls for welders should securely to protect them from molten metal splashes, moisture, harmful radiation and other factors of production environment and meet the requirements of normative-technical documentation.

2A.13. When performing welding work must comply with the requirements of GOST 12.1.004−91 and rules of technical operation of electrical installations and safety at operation of electroinstallations of consumers, approved by the Glavgosenergonadzora of the USSR, the standard of fire safety rules for industrial enterprises, approved by USSR Ministry of internal Affairs, as well as requirements of electrical and fire safety stipulated by GOST 12.1.019−79.

2A.14. Organization of workplaces of welders shall conform to the requirements of GOST 12.2.032−78 and GOST 12.2.033−78, and used tools and equipment — to meet the requirements of GOST 22269−76, GOST and GOST 22613−77 22614−77.

2A.15. For protection of atmospheric air from contamination by harmful substances produced during the welding works shall be provided for activities in accordance with the requirements of GOST 17.2.3.02−78, «Methods of calculation of concentrations in atmospheric air of harmful substances contained in emissions of enterprises» OND goskomgidromet of the USSR and other normative-technical documentation approved in the established order.

2A.16. Disposal of waste hazardous substances shall be in accordance with the requirements of sanitary rules 3183 N of the USSR Ministry of health regulating the procedure for accumulation, transportation, neutralization of toxic industrial wastes, and sanitary regulations N 3209, Ministry of health of the USSR, which establishes the maximum number of accumulation of toxic industrial waste on the territory of the enterprise (organization).

Sec. 2A. (Added, Rev. N 1).