GOST 7372-79

• gost-7372-79.pdf (651.69 KiB)
  ГОСТ 7372-79

GOST 7372−79 steel Wire rope. Technical specifications (Changes No. 1−4)

GOST 7372−79

Group V72

INTERSTATE STANDARD

STEEL WIRE ROPE

Specifications

Steel wire for ropes.
Specifications

ISS 77.140.65
OKP 12 2100

Date of introduction 1982−01−01

INFORMATION DATA

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

2. APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from 11.06.79 N 2100

3. REPLACE GOST 7372−66

4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

5. Removed the limit of validity of the Decree of Gosstandart of the USSR from 28.10.91 N 1658

6. EDITION with Amendments No. 1, 2, 3, 4, approved in February 1983, March 1983, September 1986, October 1991 (IUS 5−83, 7−83, 2−86*, 1−92), Amendment (ICS 3−2002)
_______________
* Probably a mistake of the original. In the index «National standards» 2005 — IUS 11−86. — Note the CODE.


This standard applies to steel wire of circular cross section designed for the manufacture of ropes.

(Changed edition, Rev. N 3, 4).

1. TYPES AND BASIC DIMENSIONS

1.1. The wire is made:

in view of the surface

uncoated

galvanized;

depending on the surface density of zinc three groups: S, W, coolant.

By agreement with consumer it is allowed manufacture of wire with other types of coatings according to normative-technical documentation;

mechanical properties grades: In and 1;

temporary tear resistance, N/mm(kgf/mm), marking groups: 1370 (140); 1470 (150); 1570 (160); 1670 (170); 1770 (180); 1860 (190); 1960 (200); 2060 (210); 2160 (220).

(Changed edition, Rev. N 4).

1.2. Nominal diameter limit deviation shall be as specified in table.1.

Table 1

mm

Notes:

1. At the request of the customer can be manufactured of wire, the intermediate diameters not covered by the table.1; limit deviations for these diameters should correspond to the limit deviations in the direction of the larger diameter.

2. Wire diameter from 0.18 to 0.38 mm, galvanized in groups C and W used for aircraft cables, is made with maximum deviations of ±0.01 mm, with diameters between 0.40 and 0.65 mm are manufactured with extreme deviation mm.

3. Wire without coating diameters from 0.80 to 0.95 mm, used for Elevator ropes that is manufactured with utmost deviations, mm.


(Changed edition, Rev. N 4).

1.3. The roundness of the wire must not exceed half the tolerance on the diameter.

Examples of symbols

Wire rope, uncoated, with a diameter of 0.50 mm, marking groups 1570 N/mm(160 kgf/mm) brand:

Wire 05−1570-GOST 7372−79

Wire rope with a diameter of 2.00 mm, marking groups 1570 N/mm(160 kgf/mm) of the brand, galvanized by the group of coolant:

Wire 2−1570-In-OZH GOST 7372−79

(Changed edition, Rev. N 3).

2. TECHNICAL REQUIREMENTS

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

Wire shall be manufactured from carbon rope wire rod according to normative-technical documentation.

It is possible to manufacture wire of carbon steel according to GOST 1050 and GOST 14959.

Wire for aerial rope is made of wire rod, grades 50, 55, 60, 65. Steel grade selects the manufacturer.

(Changed edition, Rev. N 3, 4).

2.2. On the surface of the wire without coating should not be cracked, shells, sunsets, shells and rust. Traces of copper plating technology on the surface of the wire are not allowed.

2.3. The zinc coating of the wire must be continuous, without gaps or cracks visible without magnifying instruments.

Allowed separate nodules zinc quantity not exceeding the positive limit deviation from the actual diameter of the wire.

Wire groups of coolant and allowed a separate SAG amount not exceeding double positive tolerance of the actual wire diameter.

2.4. Adhesion of zinc coating to the steel core must be strong. The zinc coating should not flake off and crack when the spiral wrapping of the wire on a cylindrical core with a diameter equal to the specified in table.2.

Table 2

(Changed edition, Rev. N 2, 4).

2.5. Permissible run-up temporary resistance to the rupture in the party must conform to the standards specified in table.3.

Table 3

Note. The rate of allowable takeoff temporary tear resistance is rounded to the nearest whole number, the magnitude of the number more than five after the decimal point is rounded off to the nearest higher value.


(Changed edition, Rev. N 1, 4).

2.6. The run of temporary tear resistance in a single reel should conform to the standards specified in table.4.

Table 4

N/mm(kgf/mm)

(Changed edition, Rev. N 3, 4).

2.7. Mechanical properties of wire without coating must conform to the standards specified in table.5 and 5A.

Table 5

Note. Rules twisting to diameter of 4.00 mm are 01.01.98. To 01.01.98 rules twisting is a must have for diameters from 4.00 to 4.60 mm, no more than 4, for diameters over 4.60 mm — no more than 6 points lower than specified in table.5.

Table 5A

The mechanical properties of the galvanized wire shall conform to the standards specified in table.6 and 6A.

Mechanical properties of wire diameters not specified in table.5, 5A, 6, 6A, should meet the standards for the next higher diameter.

Wire mechanical properties in table.6, 6A, the safety feature is made of galvanized groups F and coolant in agreement with the consumer.