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CuMn3 Manganin Copper Plate 1.0mm×300mm×1000mm High Conductivity Alloy Plate
Product Description
CuMn3 Manganin Copper Plate (1.0×300×1000mm)
Product Overview
CuMn3 manganin copper plate (1.0×300×1000mm) from Tankii Alloy Material is a high-precision copper-manganese alloy plate with a bright, smooth surface finish as shown. Composed of Cu (balance) + 2.5–3.5% Mn with trace stabilizing elements, it is produced via vacuum smelting, hot/cold rolling, precision annealing, and surface polishing. It features ultra-low temperature coefficient of resistance (TCR), stable resistivity, and excellent formability, making it ideal for precision resistors, current shunts, strain gauges, and electrical components requiring long-term stability.
Standard Designations & Core Material Foundation
- Alloy Grade: CuMn3 (equivalent to UNS C18700, DIN 2.0842, GB/T 2040-2017)
- Key Specification: 1.0mm (thickness) × 300mm (width) × 1000mm (length); tolerance: thickness ±0.02mm, width ±0.3mm, length ±2mm
- Chemical Composition (wt%): Mn: 2.5–3.5%; Cu: balance; Fe ≤0.3%; Pb ≤0.05%; C ≤0.1%
- Compliant Standards: ASTM B124, EN 13602, GB/T 2040-2017, RoHS 2.0
- Manufacturer: Tankii Alloy Material, certified to ISO 9001 and ISO 14001
Key Core Advantages (Centered on Bright Finish & 1.0mm Plate)
1. Ultra-Stable Electrical Performance
- Low TCR & Stable Resistivity: Resistivity = 0.18 μΩ·m (20℃), TCR = ±5×10⁻⁶/℃ (0–100℃), ensuring resistance drift ≤0.005%/℃—critical for precision measurement and control circuits.
- Bright Surface & Low Contact Resistance: Polished bright finish (Ra ≤0.2μm) reduces contact resistance and improves solderability, ideal for shunts and resistor blanks.
2. Excellent Mechanical & Processing Properties
- Good Ductility & Formability: Elongation ≥35% (annealed), bending radius ≤1× thickness (180° bend without cracking), supports stamping, etching, and laser cutting.
- High Flatness & Dimensional Accuracy: Flatness ≤0.1mm/m, thickness uniformity ±0.02mm, suitable for high-volume precision component blanking.
3. Good Corrosion & Environmental Resistance
- Atmospheric & Mild Corrosion Resistance: Forms a dense oxide film, passes 500-hour ASTM B117 salt spray test without obvious corrosion.
- Wide Operating Temperature: -40℃ to 120℃, stable performance in industrial and electronic equipment environments.
Technical Specifications
| Attribute | Value (Typical) |
|---|---|
| Alloy Grade | CuMn3 (annealed temper, M) |
| Dimensions | 1.0×300×1000mm (customizable) |
| Resistivity (20℃) | 0.18 μΩ·m |
| TCR (0–100℃) | ±5×10⁻⁶/℃ |
| Tensile Strength | ≥280 MPa (annealed) |
| Elongation | ≥35% |
| Hardness (HB) | 60–80 |
| Density | 8.90 g/cm³ |
| Surface Finish | Bright polished (Ra ≤0.2μm) |
| Operating Temperature | -40℃ to 120℃ |
Product Specifications
| Item | Specification |
|---|---|
| Supply Form | Single plate / stack (10–50 plates per stack) |
| Surface Treatment | Bright polished, pickled, or electro-tinned (optional) |
| Processability | Stamping, etching, laser cutting, CNC machining, spot welding |
| Packaging | PE film + foam interlayer + wooden crate (anti-scratch & deformation) |
| Customization | Thickness (0.5–20mm); width (100–1000mm); length (500–3000mm); hardness adjustment |
Typical Application Scenarios
- Precision Instrumentation: Precision resistors, current shunts, Wheatstone bridges for multimeters & power analyzers.
- Electronic Components: Strain gauge blanks, resistance grids for frequency converters, temperature compensation circuits.
- Industrial Control: Signal conditioning modules, PLC precision resistance elements.
- Medical & Automotive: Portable diagnostic equipment resistors, automotive sensor shunts.
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