GB/T 9944-2015Stainless Steel Wire Ropes (English PDF)

4.1 Classification

tolerance of it.

5.2.3 The steel wire rope length shall be indicated in the contract as per the

purchaser demand; otherwise determined by the supplier; however, the length of single

piece of steel wire rope shall be no shorter than 25m.

5.2.4 The steel wire rope shall be delivered as per the actual weight; while the steel

wire rope weight per 100m can refer to Table 3 and Table 4.

6.1 Raw materials

6.1.1 Steel-wire for manufacturing rope

6.1.1.1 The steel-wire for manufacturing rope shall conform to the provisions of

12Cr18Ni9, 06Cr19Ni10, 06Cr17Ni12Mo2 austenitic stainless steel stipulated in GB/T

6.1.1.2 The tensile strength of the steel-wire for manufacturing rope shall make the

manufactured steel wire rope meet the requirements of minimum breaking force

stipulated in this Standard.

6.1.1.3 When the steel-wire for manufacturing rope is performed wrapping test before

the stranded rope, the steel-wire shall not break.

6.1.1.4 The surface of the steel-wire for manufacturing rope shall be free from the

defects that may influence the use, such as cracks, ribbed bar, and burr.

6.1.2 Steel wire rope core

The steel wire rope core is the metal rope core, which can be Wire Stranded Core

(WSC) or Independent Wire Rope Core (IWRC).

6.2 Twisting quality

6.2.1 Single-twist steel wire rope indicates twisting on the left; the twisting method for

1×19 upper layer and lower layer is opposite; the double-twist steel wire rope indicates

mutual twisting on the right. The steel wire ropes with other twisting method can also

be manufactured as per the purchaser demand.

6.2.2 The steel wire rope shall be twisted evenly, tightly, straightly, and non-loose;

each strand and steel-wire within the strand shall be twisted tightly; there shall be free

from the bump, fracture or staggering-cross of steel-wire.

6.2.3 Minimize the steel-wire joints in the steel wire rope, the distance between two

7.4 Diameter measurement

7.4.1 When the diameter of steel wire rope is less than or equal to 2mm, use the

wide-mouthed measuring instrument with precision no less than 0.01mm to measure;

when the diameter of steel wire rope is greater than 2mm, use the wide-mouthed

measuring instrument with precision no less than 0.02mm to measure. Its jaw width

shall be sufficient to cross the two adjacent strands, the measurement shall be

performed in the straight part of the steel wire rope in the absence of tension; on the

two cross-sections with distance of at least 1m, individually measure the diameter in

the two perpendicular directions on the same cross-section; the average value of the

four measurement results shall be regarded as the actually-measured diameter of the

steel wire rope.

7.4.2 The measurement method of non-roundness is the same as the provision of

7.4.1 The difference between maximum and minimum values measured on the same

cross-section shall conform to the provisions of 5.2.2

7.4.3 In the event of a dispute, the diameter measurement shall be performed in case

of exerting the tension about 5% minimum breaking force to the steel wire rope.

7.5 Non-loose inspection

Untie one end of the steel wire rope, so that there are two opposite strands with the

distance of two twist pitch; when the two strands are re-twisted into the steel wire rope,

they shall restore to the original position; however, the diameter of the steel wire rope

is allowed to be increased slightly.

7.6 Straightness inspection

If the diameter of steel wire rope is less than 6mm, it shall be performed straightness

inspection. In the absence of tension, place the 6m-long steel wire rope (not cutting

from the disk) on a plane located between two parallel straight lines with distance of

75mm; in addition to the 500mm-long end, the steel wire rope shall not be in contact

with any of the two parallel lines.

7.7 Tensile test

7.7.1 The steel wire rope breaking force test shall be performed as per the provisions

of GB/T 8358.

7.7.2 Elongation test. gradually loading specimen of steel wire rope to 60% minimum

breaking force of it, keep for 1min; after that release to 2% minimum breaking force.

Under the initial load, mark the length position of 250mm or no less than 100mm; then

gradually loading to 60% minimum breaking force of steel wire rope, measure the mark

length under such load; the ratio between the increased length of marking part and the

length of initial mark shall be the elongation rate of the steel wire rope.

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