3 wires steel strand

3 wires PC strand 

We produce and supply 3 wires strand as per Europe standard , the technical data sheet as below,

1 Manufacture

 

1.1 General

 

The strand shall be manufactured from wire produced from wire rod conforming to EN 10016 - 1 and EN 10016 - 2 or EN 10016 - 4 and from steel in accordance with prEN 10138 - 1.

 

1.2 Stranding process

 

1.2.1 2 - wire strand

 

The strand shall consist of two wires of the same nominal diameter, spun together in helical form over a theoretical common axis with a lay length of 14 to 22 times the nominal strand diameter.

 

1.2.2 3 - wire strand

 

The strand shall consist of three wires of the same nominal diameter, spun together in helical form over a theoretical common axis with a lay length of 14 to 22 times the nominal strand diameter.

 

1.2.3 7 - wire strand

 

The strand shall include a straight central wire,  called a core wire around which are spun six wires in one layer. The outer wires shall be tightly spun around the central wire with a lay length between 14 and 18 times the nominal strand diameter. The diameter of the central wire shall be at least 3,0 % greater than the diameter of the outer helical wires.

 

1.2.4 7 - wire compacted strand

 

Seven wire strand which after stranding has been compacted by drawing or rolling before stress relief treatment. When stranding and compacting are carried out simultaneously, the straight central wire shall be at least the same diameter as the outer helical wires. The latter shall have a lay length of 14 to 18 times the nominal strand diameter.

 

1.3 Indented strand

 

Indentation of wires of 3 - wire strand or the indented outer wires of 7 - wire strand shall be completed before stranding.

 

NOTE 1 The centre wire of indented 7 - wire strand is normally plain.

 

The dimensions of the indentation shall be in accordance with Table 2 and Figure 1. One line of indentations shall be at a contrary angle to the others.

 

NOTE 2 Other types of indentation may be presented but should be fully specified in a similar manner to Table 2 and Figure 1 by the producer and accepted by the purchaser.

 

 

 

 

2 Requirements

 

2.1 General

 

Nominal and specified properties shall be in accordance with Tables 3, 4 and 5.

 

2.2 Behaviour during cutting

 

When the strand is cut with a disc cutter, the individual wires either shall not unravel or shall be capable of being repositioned without difficulty.

 

2.3 Straightness

 

Straightness shall be determined in accordance with EN ISO 15630 - 3. The maximum bow height from a base line 1 m in length, measured from the inside of the curve, shall be not greater than 25 mm for all strand diameters.

 

NOTE Alternative agreements on straightness including for cut lengths using the method in EN ISO 15630 - 3 may be made between producer and purchaser at the time of ordering.

 

 

3 Evaluation of conformity

 

The requirements in prEN 10138 - 1 shall be met.

 

 

4 Test methods

 

The test methods shall be in accordance with EN ISO 15630 - 3.

 

 

5 Delivery conditions

 

5.1 Identification

 

The requirements in prEN 10138 - 1 shall be met.

 

5.2 Delivery documentation

 

The requirements in prEN 10138 - 1 shall be met.

 

NOTE Where documents refer to the steel heat for strands, the heat shall be that of the predominate heat in the constituent wires of the strands

 

5.3 Dimensions and mass of unit of product

 

The dimensions and mass of the unit of product shall be agreed at the time of ordering between the purchaser and the producer consistent with the restrictions in prEN 10138 - 1. The producer shall state the coil dimensions.

 

5.4 Packaging

 

The coils shall be correctly conditioned (restraining bands) so as not to be damaged (collapse) during transport. The coils shall be marked with the direction of unwinding. A particular conditioning (e. g. core for the coil, packing paper or paperboard, protection by a water - soluble oil film) may be agreed between the purchaser and the producer.

 

 

3 wires steel strand