HRS35 (Heat Resistance Alloy)
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HRS35 is copper alloy that has excellent heat-resistance features which are attributable to small amount of additive contents such as Sn, Co, Zn, Ni, P (Cu is included more than 98.9 %)
- Even at 800 degree brazing,HRS35 maintain a fine grain and high strength.
- After high temperature(about 800oC) heating, fatigue characteristics of HRS35 is about 8 times greater than that of C1220.
- HRS35 is excellent in press forming and brazing.
Physical Properties
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HRS35 |
C1220 |
| Melting Point |
Liquidus Temp. |
1080oC |
1083oC |
| Solidus Temp. |
1075oC |
1083oC |
| Density |
8.94g / cm3 |
8.94g / cm3 |
| Heat Conductivity |
before brazed |
0.70cal/cm.S.oC |
0.81cal/cm.S.oC |
| after brazed |
0.60cal/cm.S.oC |
0.81cal/cm.S.oC |
| Expansion Coefficient |
18 x 10 -6 / oC
(25-300 oC) |
18 x 10 -6 / oC
(25-300 oC) |
| Electrical Conductivity |
before brazed |
75-65% IACS |
85% IACS |
| after brazed |
61-55% IACS |
85% IACS |
| Modulus of Elasticity |
1.2 x 105N/mm2 |
1.2 x 105N/mm2 |
Micro structures of cross section
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HRS35 |
C1220 |
| Before heating |
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| After heating 800oC |
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Even after at 800oC brazing, grain size of HRS35 doesn't increase as greatly as that of C1220. |
Grain size at various temperatures
Grain of C1220 start growing at 500oC, but HRS35 one doesn't start it up to 800oC. |
Strength at various temperatures
Strength at various temperatures
At bending stress 80N/mm2, longevity against fatigue of HRS35 is 8 times as high as that of C1220. |
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