Prestressed Concrete Wire Solution

Wire drawing dies are essential for precisely reducing the diameter of high-carbon steel rods to produce high-strength, low-relaxation steel wires used in pre-stressed concrete structures, ensuring structural integrity, high tensile strength, and minimal elongation.

Pre-stressed Concrete Wire （PC Wire）

Pre-stressed concrete wires must have strict diameter tolerance (e.g., 4.0 mm–7.0 mm ±0.01 mm) and smooth surfaces to ensure uniform stress distribution when tensioned.
The drawing process refines the steel’s grain structure, increasing tensile strength (commonly over 1700 MPa) and reducing residual stresses, which is critical for the performance of PC structures.
High-quality drawn wires are better suited for subsequent processes like stress relieving (low relaxation) and surface coating (e.g., epoxy, galvanized).

Comparison of Wire Drawing Dies for the Pre-stressed Concrete Wire Industry

When drawing high, medium, and low carbon steel wires, choosing the right wire drawing die material is crucial to improving production efficiency, extending die life, and ensuring wire quality.

Feature / Type	Nano Wire Drawing Die	PCD Wire Drawing Die	Tungsten Carbide Wire Drawing Die
Material Structure	Tungsten carbide base with nano-scale CVD diamond coating	Synthetic polycrystalline diamond	Tungsten carbide with cobalt binder
Wear Resistance	Very high – significantly extends die life	Extremely high – suitable for heavy continuous production	Moderate – wears faster, especially in heavy-load drawing
Surface Finish Quality	Excellent – produces smooth, defect-free wire surfaces	Very good – maintains consistent finish over long runs	Good – acceptable, but higher risk of minor surface flaws
Dimensional Stability	Excellent – critical for maintaining tight tolerances	Excellent – very low dimensional drift	Moderate – frequent adjustments may be required
Effect on Wire Tensile Properties	Outstanding – promotes high tensile strength and uniformity	Very good – maintains mechanical property consistency	Moderate – possible variation due to higher friction
Suitable Wire Size Range	Medium to large wires (typically 4–7 mm for PC Wire)	Medium to large wires	Broad range, but less stable for very tight tolerance needs
Cost	High upfront, better long-term ROI due to fewer changes	High upfront, economical for mass production	Low to medium initial cost
Maintenance / Re-polishing	Limited – replacement needed after coating wears	Difficult to polish but durable for extended runs	Easy to refurbish and polish multiple times
Typical Use Cases	Premium PC wires for critical infrastructure projects (bridges, highways, large buildings)	High-volume PC wire manufacturing	General PC wire production with moderate quality requirements

Nano Wire Drawing Die: Best suited for premium-grade pre-stressed concrete wires where ultimate surface quality, tight tolerance, and maximum tensile strength are required — ideal for critical infrastructure applications.
PCD Wire Drawing Die: Best for large-scale production of PC wires, offering excellent balance between cost, wear resistance, and product consistency.
Tungsten Carbide Wire Drawing Die: The most economical choice, acceptable for general PC wire applications where extremely high precision is not critical.