From an experienced industry perspective, high-quality PC strand can be identified through the following checks:

Stress–strain curve quality

The curve should be smooth and continuous, without abnormal fluctuations, indicating stable wire drawing and consistent heat treatment.

Surface condition

Inspect whether there are visible drawing marks, scratches, or irregular surface defects, which may indicate poor production control.

Packaging and corrosion protection

Proper packaging should effectively prevent condensation and corrosion during transportation, especially for long-distance sea shipments.

Relaxation test documentation

A 1,000-hour relaxation test report is a key indicator of a top-tier supplier and a reliable benchmark for long-term performance.