GOST 3070-88 Double Lay Steel Wire Rope

GOST 3070-88 applies to double lay steel wire ropes with point contact between wires in TK-type strands, with a fiber core.

The standard does not apply to ropes used on lifting cranes.

Ropes are classified as follows:

By application:

• hoisting G

By mechanical properties:

• grade VK,
• grade V,
• grade 1.

By type of wire surface coating:

• uncoated wire,
• galvanized wire, depending on zinc coating weight: S, Zh;

By rope lay direction:

• right-hand,
• left-hand L

By combination of lay directions of rope elements:

• cross lay;

By lay method:

• untwisting,
• non-untwisting N;

By manufacturing accuracy:

• normal,
• increased T.

By degree of balance:

• straightened R,
• non-straightened.

Table 1

Diameter, mm			Calculated cross-sectional area of all wires in the rope, mm²	Approximate mass of 1000 m of lubricated rope, kg	Marked group, N/mm² (kgf/mm²)
rope	wire				1570(160)		1670(170)		1770(180)
	central	in layers			Calculated breaking force, N, min
	6 wires	108 wires			total of all wires in the rope	rope as a whole	total of all wires in the rope	rope as a whole	total of all wires in the rope	rope as a whole
3.3	0.22	0.20	3.62	35.5					6385	5490
3.6	0.24	0.22	4.38	42.9	-	-	-	-	7725	6640
3.9	0.26	0.24	5.20	51.0	-	-	-	-	9170	7885
4.2	0.28	0.26	6.10	59.8	-	-	-	-	10750	9245
4.5	0.30	0.28	7.07	69.3	-	-	-	-	12450	10700
4.8	0.32	0.30	8.12	79.6	12700	10900	13500	11600	14300	12250
5.5	0.36	0.34	10.42	102.6	16300	14000	17350	14900	18350	15750
5.8	0.38	0.36	11.67	114.5	18250	15650	19400	16650	20550	17650
6.5	0.45	0.40	14.53	142.5	22750	19550	24200	20800	25600	22000
8.1	0.55	0.50	22.64	222.0	35450	30450	37700	32400	39900	34300
9.7	0.65	0.60	32.52	319.0	50950	43800	54150	46550	57350	49300
13.0	0.85	0.80	57.70	565.5	90450	77750	96100	82600	101500	87250

Continuation of Table 1

Diameter, mm			Calculated cross-sectional area of all wires in the rope, mm²	Approximate mass of 1000 m of lubricated rope, kg	Marked group, N/mm² (kgf/mm²)
rope	wire				1860(190)		1960(200)		2060(210)		2160(220)
	central	in layers			Calculated breaking force, N, min
	6 wires	108 wires			total of all wires in the rope	rope as a whole	total of all wires in the rope	rope as a whole	total of all wires in the rope	rope as a whole	total of all wires in the rope	rope as a whole
3.3	0.22	0.20	3.62	35.5	6740	5795	7095	6100	7445	6400	7800	6705
3.6	0.24	0.22	4.38	42.9	8155	7010	8580	7375	9010	7745	9440	8115
3.9	0.26	0.24	5.20	51.0	9680	8320	10150	8725	10700	9200	11200	9630
4.2	0.28	0.26	6.10	59.8	11350	9760	11950	10250	12550	10750	13150	11300
4.5	0.30	0.28	7.07	69.3	13150	11300	13850	11900	14550	12500	15200	13050
4.8	0.32	0.30	8.12	79.6	15100	12950	15900	13650	16700	14350	17500	15050
5.5	0.36	0.34	10.42	102.6	19400	16650	20400	17500	21400	18400	22450	19300
5.8	0.38	0.36	11.67	114.5	21700	18650	22850	19650	24001	20600	25150	21600
6.5	0.45	0.40	14.53	142.5	27060	23250	28450	24450	29900	25700	31300	26900
8.1	0.55	0.50	22.64	222.0	42150	36200	44350	38100	46550	40000	-	-
9.7	0.65	0.60	32.52	319.0	60550	52050	63700	54750	66900	57500	-	-
13.0	0.85	0.80	57.70	565.5	107400	92350	113000	97150	-	-	-	-

Notes:

1. Ropes whose breaking force is shown to the left of the bold line are made of uncoated and galvanized wire. In this case, a rope made of galvanized wire of group Zh with a diameter of 13.0 mm and a marked group of 1960 N/mm (200 kgf/mm²) is made by agreement between the manufacturer and the consumer.

Ropes whose breaking force is shown to the right of the bold line are made of uncoated wire; by agreement between the manufacturer and the consumer, ropes may be made of galvanized wire.

2. Rope diameters greater than 10 mm are rounded to whole numbers or to 0.5 mm.

3. The rope diameter is calculated to ensure clearance between strands.

(Amended edition, Amendment No. 1).

Corresponds to DIN 3060.