Generally, 1*7- 15.2 is 15.2 mm steel strand, 7 galvanized steel wires are 5.06 in diameter, and 19 1* 19 steel strand is 3.04 in diameter and/kloc-9 in diameter. 1860 is the prestress tensile strength of steel wire in MPa.
At present, the most commonly used steel strands are galvanized steel strands and prestressed steel strands. The diameter of commonly used prestressed steel strand ranges from 9.53mm to 17.8mm, and the smaller steel strand has a larger diameter. Generally, each stranded wire has 7 steel wires, but there are also 2, 3 and 19 steel wires. The steel wire can have a metal or nonmetal anticorrosive coating. Unbonded prestressed steel strand coated with anticorrosive grease or paraffin and high density polyethylene.
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classify
(1) Classification by purpose
Prestressed steel strand, galvanized steel strand (for power use) and stainless steel stranded wire, among which prestressed steel strand is called unbonded steel strand after being coated with anticorrosive grease or paraffin wax, and it is also made of galvanized or galvanized aluminum alloy steel wire.
(2) Classification according to material characteristics
Steel strand, aluminum-clad steel strand and stainless steel stranded wire.
(3) Classification by structure
According to the number of steel wires, prestressed steel strands can be divided into 7 wires, 2 wires, 3 wires and 19 wires, and the most commonly used structure is 7 wires.
Galvanized steel strand and aluminum-clad steel strand for power are also divided into 2, 3, 7, 19, 37 and other structures according to the number of steel wires, and the most commonly used structure is 7-wire structure.
(4) according to the surface coating classification
It can be divided into (smooth) steel strand, galvanized steel strand, epoxy-coated steel strand, aluminum-clad steel strand, copper-plated steel strand, plastic-clad steel strand and so on.
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