Alloy Portfolio
KMD alloys portfolio can meet various customer needs from low to high-end
Hot-dip Tinning Process
Due to stiffer reliability requirements, electro-mechanical components are increasingly made of pre-tinned strips. Above all in the automotive industry, hot-dip tinning proved to be a superior corrosion protection surface treatment.
KMD group has mature hot-dip tinning technology. We have the first HDT line and HDT patent in China. Moreover, we are exclusive producer of Sn13 and Sn28m
| Hot-dip tinning coating types | ||
|---|---|---|
| Sn10-pure tin | Sn13-thermal tin | Sn28M- tin silver |
| Coating-thickness-specifice advantages | Lowest mating and unmating forces, wear resistant | Temperature range above 130℃, improved electrical properties compared to pure tin, compatible with the new lead-free solders |
| Hot-dip tinning DIN EN 13149 (compliant with RoHS standards) | |||
|---|---|---|---|
| Thickness | Width | Coatings | Coating thickness** |
| 0.20-1.50 mm | Up to 330 mm | Pure tin, tin silver, thermal tin |
1.0-3.0 μm2.0-5.0 μm4.0-10.0 μm10.0-20.0 μm
** Coating thickness ≤ 2μm on request |
Profiled Strips
KMD provides customized special-shaped profile processing services, utilizing professional milling processes to support the customization of alloy strips with single/double-sided multi-level thickness variations.
Schematic of a Standard Profiled Strip
Customized Adaptation
Molded to Demand: Custom multi-step profiling can be performed based on specific customer needs for strip width and thickness, ensuring a precise fit for various application scenarios.
Simplified Process
Cost Reduction & Efficiency: Delivered directly with the finished cross-section, eliminating post-processing steps like secondary shaping or grinding. This streamlines production and compresses costs.
Easy Development
Fast Delivery: No expensive mold development required. Production is achieved through simple tooling adjustments, resulting in low investment costs, quick response, and short lead times.
Stable Material Properties
Performance Upgrade: Profiling does not damage the internal structure fully retaining the base material’s original properties. While saving material, it significantly improves bending toughness and contact pressure strength.
Dimensional Definitions forProfiled Processing
Dimensional Rangeand Precision |
Range | Precision/ Tolerance | |
|---|---|---|---|
| Width | W | 10-200mm | ±0.05mm |
| Original Thickness | T | 0.2-2.5mm | ±0.01mm |
| Residual Thickness | t | ≥0.1mm | ±0.01mm |
| Thickness Ratio | T/t | ≤5 | - |
| Profiled Zone Width | CW | ≥1mm | ±0.05mm |
| Transition Angle | α | ≤88° | ±1° |
| Profiled Surface Roughness* | Ra/Rmax | - | ≤0.4/2.5µm |
| Non-profiled Surface Roughness* | Ra/Rmax | - | ≤0.3/1.5µm |
| Radius | R | - | ≥0.1mm |
| Symmetry** | S | - | ≥0.01mm |
*Surface Roughness: Measured across both parallel and perpendicular directions relative to the strip orientation. **Symmetry: Applicable to double-sided symmetrical milled products.
Types of Profiled Milling
Single-Groove Milling
Double-sided Milling
Single-Side Milling
Multi-Groove Milling
Fillet/Radius Milling
Dual-Surface Milling
Unwinding Direction
Clockwise Unwinding
Counter-Clockwise Unwinding
Lead-End & Profiled Surface Orientation
1. Profiled area facingUP, inward
2.Profiled area facingUP, outward
3. Profiled area facingDOWN, inward
4. Profiled area facingDOWN, outward
Packaging Service
We provide various supply formats for the customers to choose the most effective one for them
Pancake coils
Up to 1400mm outer diameter
Traverse-wound strip
Drums, traverse wound strips on wook, plastic or steel drums, or flangeless on cardboard or copper core.
Packaged weight: 300 - 1500 kg
Multilayer coils
Several large pancake coils are joined together by resistance welding and supplied palletised for use on pallet de-coilers. The multilayer forms on continous strip thus significantly reducing set-up time during stamping.
Availability: all KMD alloys
Standard pallet weight: 1500 kg (higher weights upon request)
Solution
We provide customers with various supply forms so that they can choose the most effective way.
Intelligent driving system
Good electrical and thermal conductivity to support the proper operation of the electronics and sensors in the system and ensure good heat dissipation.
New energy vehicles
Higher electrical conductivity and good thermal conductivity to reduce energy loss during electricity transmission and effectively dissipate heat to prevent overheating.
Communication data transmission
Excellent electrical conductivity ensures high-speed and stable signal transmission.
Smart wearable
Lightweight materials, excellent thermal performance.
