High-Tensile Galvanized Steel Strand: ASTM A475-Compliant Solutions for Utility & ACSR Cable Reinforcement.
Multi-Grade Zinc-Coated Strands with 1,470–1,960 MPa Tensile Strength.
Engineered to ASTM A475, BS EN 50189, and ISO 9001 standards, our galvanized steel strands deliver 20–35% higher corrosion resistance than bare steel for power transmission, bridge cables, and guy wires. Available in 7/19/37-wire configurations with 1.44–4.77mm wire diameters, these strands achieve precision zinc coatings of 153–275g/m² for harsh environments.
Key Features:
- Wire Grades: Utilities Grade, High Strength (HS), Extra High Strength (EHS)
- Zinc Coating: Class A (min. 153g/m²) to Class C (275g/m²)
- Certifications: ISO 9001, ISO 14001, OSHA, TUV
Technical Specifications by Strand Configuration
7-Wire Strand (ASTM A475)
| Nominal Diameter | Wire Size | Weight/304.8m | Breaking Strength | Zinc Coating | Applications |
|---|---|---|---|---|---|
| 1/4″ (6.35mm) | 2.03mm | 55kg | 29.58kN (EHS) | 183g/m² | Tower guy wires, ACSR cores |
| 3/8″ (9.52mm) | 3.05mm | 124kg | 68.50kN (EHS) | 259g/m² | Transmission line messengers |
| 1/2″ (12.7mm) | 4.19mm | 234kg | 119.66kN (EHS) | 275g/m² | Suspension bridges, mine hoists |
19-Wire Strand (BS EN 50189)
| Diameter | Wire Size | Breaking Strength | Coating Weight | Standard |
|---|---|---|---|---|
| 5/8″ (15.88mm) | 3.18mm | 178.82kN | 259g/m² | ASTM B498 |
| 3/4″ (19.05mm) | 3.81mm | 259.33kN | 275g/m² | BS EN 50189 |
Material Properties & Chemical Composition
High-Carbon Steel Wire (GB/T4354-2008)
| Grade | Carbon (%) | Silicon (%) | Manganese (%) | Phosphorus ≤ | Sulfur ≤ |
|---|---|---|---|---|---|
| SWRH77B | 0.74–0.81 | 0.15–0.35 | 0.60–0.90 | 0.030 | 0.030 |
| SWRH82B | 0.79–0.86 | 0.15–0.35 | 0.60–0.90 | 0.030 | 0.030 |
Mechanical Performance:
- Tensile Strength: 1,470–1,960 MPa (Grade 1470 to EHS)
- Elongation: ≥3.5% (per ASTM A370)
- Zinc Adhesion: No flaking after 5×3mm mandrel wrap test
Applications & Industry Compliance
- Power Transmission:
- 12.7mm 19-wire (EHS): ACSR cable reinforcement (30% higher sag resistance)
- Telecommunications:
- 9.52mm 7-wire (HS): Guy anchors for cell towers (1,200-hour salt spray resistance)
- Civil Engineering:
- 19.05mm 19-wire (EHS): Suspension bridge hangers (1,800MPa load capacity)
Why Choose Our Strands?
- Anti-Fatigue: 2 million cycles @30% breaking load (ISO 6946)
- Global Compliance: Meets ASTM (USA), BS EN (EU), JIS (Japan)
Manufacturing Process & Quality Control
- Wire Drawing: Hot-rolled rods cold-drawn to ±0.02mm tolerance.
- Stranding: Closed-loop 7/19/37-wire helical forming (lay length = 12–16×diameter).
- Galvanizing:
- Pre-treatment: Acid pickling (HCl 15%) + fluxing (ZnCl₂/NH₄Cl)
- Coating: 440–460°C hot-dip immersion (coating thickness: 60–110µm)
- Testing:
- Salt Spray Test: 2,000+ hours (ASTM B117)
- Torsion Test: ≥10 twists without fracture (wire)
Competitive Advantages
| Parameter | Our Strands | Industry Average |
|---|---|---|
| Zinc Coating Adhesion | Zero flaking | ≤5% flaking |
| Diameter Tolerance | ±0.05mm | ±0.10mm |
| Lead Time | 10–20 days | 30–45 days |
Certifications:
- ISO 14001: Environmental management
- TUV Rheinland: Load safety verification
- UL Certified: Electrical applications
Packing And Delivery
