Special Galvanized Steel Wire for Blasting Cord
Superior Performance and Long-Lasting Durability
Detonator blasting wire is a high-strength, high-reliability connecting wire specifically designed for blasting operations. It primarily connects detonators to blasting units to transmit blasting signals. The product must comply with GB/T 21652-2018 (Wire Ropes for Blasting Operations) and ISO 11408:2018 standards, featuring high tensile strength, stable electrical conductivity, corrosion resistance, and fatigue resistance.
Detailed Technical Specifications
| Parameter | Technical Requirement | Test Standard |
| Diameter Range | 0.50mm-1.20mm (±0.02mm) | GB/T 3428 |
| Tensile Strength | 1400-1800MPa | ASTM E8/E8M |
| Resistivity | ≤0.072 Ω·mm²/m (20°C) | IEC 60228 |
| Number of Bends | ≥12 times (R=5mm) | ISO 6892 |
| Zinc Coating Weight | 5-30g/m² (Class A-B) | ISO 1460 |
Material and Process Characteristics
Base Material Selection:
High-carbon steel: 72A/82B (carbon content 0.70%-0.85%), ensuring balanced strength and toughness
Special alloys: Optional Cu-Co coated steel wire for enhanced conductivity
Coating Process:
Hot-dip galvanizing: Zinc layer thickness 20-30μm, salt spray test ≥96h without red rust
Copper + Zinc Composite Plating: Copper layer for conductivity + Zinc layer for corrosion resistance, reduces resistance by 40%
Insulation Treatment:
PVC/PE Sheath: Thickness 0.3-0.8mm, voltage resistance ≥5kV
Color Identification: Red/Yellow dual-color stripes for easy on-site identification
Blasting Scenario Application Solution
| Blasting Type | Recommended Specifications | Technical Key Points |
| Mining Blasting | 0.80mm/1600MPa/PVC Insulation | Resistant to rock abrasion, short-circuit protection |
| Tunnel Engineering | 1.00mm/1500MPa/PE Sheath | Moisture-resistant, tensile strength |
| Demolition Blasting | 0.60mm/1800MPa/Dual-color Marking | High flexibility, easy identification |
| Underwater Blasting | 1.20mm/1400MPa/Polyethylene Encapsulation | Water pressure resistance, corrosion resistance |
Quality Control and Certification
Full-Process Inspection:
o Online eddy current flaw detection (crack detection rate ≥99.5%)
o Resistance value testing per roll (deviation ≤±3%)
o Blast simulation test (500 detonations without rupture)
Industry Certifications:
o Coal Mine Safety Mark Certification (MA)
o Civil Explosives License
o ISO 9001 & ISO 14001 Systems
Packaging, Product Selection, After-Sales Service
Packaging and Transportation Specifications
Explosion-proof Packaging: Flame-retardant plastic reels, 200-500 meters per reel
Label Information: Batch number, resistance value, production date, burst rating
Transportation Requirements: Dangerous goods transport certification (UN 0030)
Selection Recommendations
Conventional Open-Pit Blasting: Opt for 0.80mm galvanized steel wire for optimal cost-effectiveness.
High-Gas Environments: Mandatory selection of insulated sheath + dual-color identification specification.
Underwater Operations: Recommended polyethylene encapsulation + 1.20mm high-tensile steel wire.
Enhanced After-Sales Service
Our professional technical team provides 24/7 online support, complimentary sample testing services, and quality issue responses within 2 hours. On-site technical support is available upon request.
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