Qingdao Haosail Machinery Co., Ltd.

A: 6×19S: The surface of the strand is flat, the outer wires are closely arranged and the diameter is obviously thicker. There is no obvious depression on the surface of the strand when touched by hand (because the outer wire diameter is consistent and protruding).

6×19 (ordinary type): The surface of the strand has a slight bumpy feeling, and there are fine filling wires between the outer wires. The overall appearance is more "round", but the outer wire diameter is more uniform (no obvious thick and fine stratification).

A: Short-term emergency: If the load and working conditions are similar (such as a small load reduction), temporary replacement is possible, but long-term mixed use is not recommended.

Situations where replacement is prohibited:

When 6×19S is used in high-wear scenarios (such as tower crane lifting), it cannot be replaced by 6×19 (it is easy to break the wire due to excessive wear);

When 6×19 is used in scenarios that require frequent bending (such as small winches), it cannot be replaced by 6×19S (it is easy to break due to fatigue due to excessive rigidity).

A: The anti-corrosion performance of both depends mainly on the surface treatment (such as galvanizing, oiling), and has nothing to do with the structure. However, because the outer steel wire of 6×19S is thick and the gap is small, rainwater and impurities are not easy to penetrate into the strand, and the rust speed is slightly slower than 6×19 (the gap between the filling wires is easy to accumulate dirt). It is recommended to give priority to galvanized type (Zn or Zn-Al alloy coating) and apply anti-corrosion grease regularly.

A: 6×19S: Focus on checking the wear of the outer thick steel wire (if the diameter reduction is greater than 10%, it needs to be scrapped) and the broken wire at the contact pulley (due to high rigidity, the wire is easily broken at the bend).

6×19: Pay attention to the wear and shedding of the filler wire (the breakage of the filler wire will cause uneven force on the outer steel wire), as well as the accumulation of dirt in the gap between strands (more frequent cleaning and lubrication are required).

A: Basically the same: the safety factor of the lifting scene is ≥5, the traction scene is ≥6, and the manned scene is ≥9. However, due to the slightly lower breaking tensile force of 6×19, the actual selection needs to be more conservative (for example, under the same load, 6×19 needs to choose a larger diameter).