Flat Wire
The Perfect Fusion of Precision
Flat wire, as a specialized cold-formed product, is manufactured through precision rolling processes that transform round wire into a rectangular cross-section. This unique geometric shape delivers exceptional performance advantages across multiple industrial sectors. Our flat wire is crafted from premium carbon steel and stainless steel materials, undergoing rigorous quality control procedures to ensure industry-leading standards in dimensional accuracy, mechanical properties, and surface finish.
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Precision Dimensional Control
We employ advanced four-roll precision rolling mills to ensure flat steel wire dimensional tolerances are strictly controlled within ±0.05mm. This precision control enables products to meet high-accuracy assembly requirements, making them particularly suitable for applications demanding maximum space utilization. Through real-time monitoring by an online laser measurement system, we guarantee outstanding dimensional consistency across every production batch.
Superior Mechanical Properties
The unique manufacturing process of flat steel wire delivers superior section modulus while maintaining excellent ductility. Compared to round steel wire of equivalent cross-sectional area, flat steel wire exhibits approximately 30% higher bending stiffness, making it an ideal choice for springs and elastic components. Through specialized heat treatment, the product achieves tensile strengths ranging from 650 to 950 MPa while retaining ≥8% elongation after fracture.
Diverse Surface Treatments
We offer multiple surface treatment solutions to meet diverse application requirements. Galvanized finishes utilize eco-friendly blue-white zinc processes, achieving salt spray test durations exceeding 72 hours. Copper plating maintains uniform thicknesses of 3-5μm, delivering both aesthetic appeal and reliable electrical conductivity. Additionally, we provide specialized treatments like phosphating and Dacromet upon customer request.
Detailed Technical Specifications
| Parameter Category | Technical Specifications | Test Standards | Performance Description |
| Basic Specifications | |||
| Material Grade | Material Grade Q195-Q235, SWRH42A-72B, 304/316 Stainless Steel | GB/T 4357 | Multiple materials available |
| Cross-section dimensions | 0.50×0.80 mm to 5.00×2.50 mm | ASTM E8/E8M | Customization available |
| Dimension Tolerance | ±0.05mm | GB/T 342 | High Precision |
| Mechanical Properties | |||
| Tensile Strength | 650-950 MPa | ASTM E8/E8M | Available in graded specifications |
| Yield strength | 500–800 MPa | ASTM E8/E8M | Proportional coordination |
| Elongation at break | ≥8-15% | ASTM E8/E8M | Good plasticity |
| Hardness | HV 280-420 | ASTM E92 | Uniform and consistent |
| Surface Properties | |||
| Galvanized coating | 5-15μm | ASTM B117 | Corrosion resistance |
| Parameter Categories | Technical Specifications | Test Standards | Performance Descriptions |
| Copper plating layer | 3-5μm | ASTM B487 | Excellent electrical conductivity |
| Surface roughness | Ra ≤ 0.8μm | GB/T 3505 | Smooth and uniform |
Detailed Explanation of Professional Application Fields
Precision Spring Manufacturing
Flat steel wire is the material of choice for manufacturing high-stress coil springs, torsion springs, and wave springs. Its uniform cross-sectional shape ensures even stress distribution during spring operation, significantly enhancing fatigue life. Actual test data shows that springs manufactured using our flat steel wire exhibit approximately 25% longer fatigue life compared to traditional round steel wire springs.
Electronic Components
Flat steel wire finds extensive application in electronic connectors, battery terminals, and electromagnetic shielding components due to its precise dimensions and excellent electrical conductivity. Our specially developed electronic-grade flat steel wire achieves dimensional tolerances as tight as ±0.03mm and surface cleanliness meeting electronic industry standards.
Automotive Safety Systems
Flat steel wire plays a critical role in automotive seatbelt pretensioners, seat adjustment mechanisms, and window/door lifters. Through rigorous material screening and process control, we ensure full compliance with the automotive industry's TS16949 quality system requirements.
Quality Control and Certification
We maintain a comprehensive quality assurance system with 12 quality control points spanning from raw material intake to finished product shipment. All products are certified under the ISO 9001:2015 quality management system, with select products additionally certified by UL and RoHS. Our laboratory is equipped with advanced material testing equipment capable of conducting complete mechanical property testing, metallographic analysis, and salt spray testing.
Packaging and Logistics Assurance
We have designed specialized packaging solutions tailored to the characteristics of flat steel wire. Dual protection-rust-proof paper inner packaging and waterproof woven bags for outer packaging-ensures products remain in optimal condition during transportation and storage. Standard packaging weight is 25kg per roll, with 5kg small packages or 500kg I-beam reels available upon request. Leveraging our comprehensive logistics network, we guarantee delivery within 7-15 business days after order confirmation.
Our technical team stands ready to provide product selection guidance and technical support. Request complimentary samples for testing. We look forward to establishing a long-term partnership with you.
why choose us
We are not only manufacturers, but also your partners.
why choose our products
Rigorous Quality Assurance
CNAS-accredited laboratory, 12-step testing process, over 99.8% product pass rate, ensuring consistent and reliable quality in every batch.
Stable Supply Assurance
With dozens of automated production lines, we achieve an annual output of hundreds of thousands of tons. Our inventory of standard products exceeds 500 tons, and we maintain a 99.5% on-time delivery rate for orders.
Comprehensive After-Sales Service
Our professional technical team provides 24-hour response, free sample testing, solutions for quality issues within 2 hours, and on-site resolution within 48 hours.
Choose us, and you gain not only premium products but also a trusted long-term partner.
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