High strength and high conductivity heat-resistant copper alloy
HRSC
C18620（Pipe）
C18625（Strip・Plate、Bar、Wire、Forgings）
HRSC has high thermal conductivity and high electrical conductivity.
And it has an excellent balance of strength and workability.
HRSC maintains initial strength inspite of heat -treatment at 800℃×10min due to the grain growth is
suppressed.
HRSC is able to be provided at various shapes (such as plate,strip,rod/bar,pipe,wire and hot
forged).
Positioning map
HRSC is a heat-resistance copper alloy. And it has high electric conductivity (equal to Phosphorus deoxidized copper‐C1220) and strength (par with brass‐C2600 and Phosphor bronze‐C5191) .
Main features
- Has high thermal and electrical conductivity and also has an excellent balance of strength and workability.
- Good bending workability, press workability, and drawing workability.
- Maintains initial strength inspite of heat-treatment at 400℃
- Maintains initial strength inspite of brazing at 800℃ ×10min..
- Possible to process reflow-Sn plating with excellent surface quality and whisker resistance
Chemical composition
(Weight %)
| Cu | Co | P | Sn | Ni |
|---|---|---|---|---|
| Rem. | 0.27 | 0.08 | 0.04 | 0.04 |
Technical Data
Physical properties
(Weight %)
| Property | Representative Value |
|---|---|
| Specific Gravity (293K) | 8.9 |
| Coefficient of Linear expansion（ ×10-6/K：293～573K） | 17.1 |
| Thermal Conductivity（W/(m・K)：293K） | 330 |
| Electrical Conductivity（%IACS：293K） | 85 |
| Modulus of Elasticity（kN/mm² : 293K） | 125 |
| Poisson Ratio（293K） | 0.33 |
Mechanical properties (Sampling Direction ; L.D.)
| Shape | Strip※ | Rod/Bar | Forging |
|---|---|---|---|
| Size(mm) | 0.65 | Φ10 | - |
| Temper | H | H | As aged |
| Tensile Strength （N/mm²） |
525 | 540 | 380 |
| 0.2% Yield Strength （N/mm²） |
510 | 520 | 255 |
| Elongation （％） |
5 | 15 | 40 |
| Vickers Hardness （HV） |
(160)＊ | 165 | 115 |
| Electrical Conductivity （％IACS） |
85 | 85 | 85 |
Heat resistance
Even after brazing heat treatment (800 °C x 10 minutes), there is no coarsening of the metal structure and it has thermal stability compared with C1220.
Heat treatment condition： 800 °C × 10 min (equivalent condition for brazing in
furnace)
a) HRSC (G.S. 10 µm) 0.2% proof stress of 110 N/mm²
b) C1220 (G.S. 100 µm) 0.2% proof stress of 22 N/mm²
Heat resistance：cross-sectional structure and strength after brazing heat treatment
Heat resistance: isochronal annealing curve
Stress relaxation resistance
Test method: JCBA-T309: 2004
Exposure temperature：150℃
Bending stress: 0.2% yield
strength 80%
Evaluation: The mean value of TD and LD
Bending workability
It has good bending workability and it can cope with various processing.
- Strip product 90 ° W bending (bending evaluation, safety bending radius)
- Strip product 180 ° tight bending
- Rod/Bar product 180 ° bending appearance
| Temper | Sampling Direction | Bending Inside Radius (mm) R | Evaluation | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.0 | 0.1 | 0.15 | 0.2 | 0.3 | 0.4 | 0.6 | 0.8 | 1.0 | 2.0 | R/t | ||
| H | G.W. | ▲ | ▲ | △ | △ | △ | △ | ○ | ○ | ◎ | ◎ | 0.2 |
| B.W. | ▲ | ▲ | ▲ | ▲ | ▲ | △ | △ | △ | ○ | ◎ | 0.6 | |
| EH | G.W. | ▲ | ▲ | ▲ | ▲ | △ | △ | △ | ○ | ○ | ◎ | 0.5 |
| B.W. | ▲ | ▲ | ▲ | ▲ | ▲ | ▲ | △ | △ | △ | ○ | 0.9 | |
Bending test 180°(B.W.) R/t=0
Temper: H, Thickness0.64mm
Strip: 180°adhesion bending
Rod/Bar Temper: 0, φ25mm
Bar: 180°bending appearance
Fatigue properties
It has good fatigue property.
