🏭 Project Background
Customer Type: European Steel Processing Group
Industry: Long Products / Rebar Manufacturing
Application: Automatic tying of rebars in Bar Mill production line
The customer required high-strength steel strip for tying rebars, used in a fully automated bundling system with strict mechanical and dimensional requirements.
Original Inquiry (RFQ Snapshot)
"Please send us an offer for steel strip for tying.
Product: 32 × 0.8 mm
Quantity: 25ton
Application: tying rebars in coil in the Bar Mill section."
Technical Requirements
🔹 Product Specification
| Parameter | Requirement |
|---|---|
| Product | Steel Strip for Tying |
| Width | 32 mm (±0.10 mm) |
| Thickness | 0.80 mm (±0.03 mm) |
| Form | Coil |
🔹 Mechanical Properties
| Property | Requirement |
|---|---|
| Tensile Strength | 780 – 830 N/mm² |
| Breaking Force | 19,810 – 21,080 N |
| Elongation (L5) | 20 – 21 % |
| Elongation (L100) | 12 – 13 % |
👉 Key requirement:
High strength + controlled elongation to ensure reliable tying without breakage or over-stretching.
🔹 Special Technical Requirements
Unwinding direction: Clockwise
Application: Automatic tying machines
Must ensure:
Stable feeding
No coil tangling
Consistent tension during operation
Packaging Requirements
| Item | Requirement |
|---|---|
| Coil Type | Super Jumbo |
| Coil Weight | ~900 kg per coil |
| Position | Horizontal on pallet |
| Loading | Full truck load |
👉 This is a typical high-efficiency steel mill logistics requirement.
Customer Pain Points
During communication, the customer revealed issues with previous suppliers:
❌ Strip breaking during high-speed tying
❌ Inconsistent tensile strength between coils
❌ Poor coil winding → machine downtime
❌ Packaging instability causing deformation during transport
Our Technical Solution
✔ Material Design
Optimized carbon steel composition
Controlled rolling + heat treatment
👉 Achieved:
Stable tensile strength within ±20 MPa range
Balanced strength and elongation
✔ Mechanical Performance Control
Online tensile testing per batch
Breaking force strictly controlled within:
19,800 – 21,000 N (actual production range)
✔ Dimensional Precision
| Parameter | Control Level |
|---|---|
| Width | ±0.08 mm |
| Thickness | ±0.02 mm |
👉 Better than customer requirement → improved machine compatibility
✔ Coil Winding Technology
Precision layer winding
Controlled tension during coiling
Guaranteed:
Smooth unwinding
No overlapping or edge damage
✔ Packaging Optimization
Reinforced pallet structure
Anti-rust protection film
Horizontal coil fixation system
Negotiation Process
🔹 Stage 1 – Technical Clarification
Customer asked:
"Can you guarantee stable performance for automatic tying machines?"
👉 We provided:
Test data from similar bar mill customers
Coil unwinding video demonstration
🔹 Stage 2 – Sample Testing
Supplied 2 trial coils (~1.8 tons total)
Customer tested on production line
👉 Result:
No breakage
Stable feeding
Improved efficiency
🔹 Stage 3 – Price & Logistics
Customer target:
Competitive truck-load pricing
Stable monthly supply
Final agreement:
Order volume: 25 tons (full truck)
Coil weight: ~900 kg each
Lead time: 20–25 days
🚚 Order Execution
Total shipment: 25,000 kg
Number of coils: ~28 coils
Delivery: Full truck load (FTL)
Delivery time: On schedule (22 days)
Performance Results
Production Feedback:
✅ Zero strip breakage
✅ Machine downtime reduced by ~18%
✅ Tying efficiency increased by ~12%
✅ Stable coil unwinding
Business Impact
Customer placed repeat orders within 2 months
Monthly demand stabilized at 80–120 tons
Became long-term contracted supplier
