Alloy 25 c17200 CuBe2 beryllium copper
C17200 CuBe2 beryllium copper
C17200 is also known as Alloy 25 and is the most commonly utilized beryllium copper alloy and is notable
for exhibiting the highest strength and hardness compared to commercial copper alloys.Its strength and
hardness is similar to that of steel. C17200 copper's ultimate tensile and Rockwell hardness properties in a
peak aged condition are in the 200 ksi range and RC 45 respectively .
Physical properties
| Density(g/cm3) |
8.26 |
| Electrical conductivity{IACS%(20℃)} |
25 |
| Modulus of elasticity(KN/mm2) |
127 |
| Thermal conductivity{W/(m*K)} |
83.7-130 |
| Coefficient of thermal expansion (10-6/℃ 20/℃~100/℃) |
17.8 |
Mechanical Properties
| Temper |
Tensile Strength |
Yield Stength |
Elongation A50 |
Hardness |
Bendability |
Bendability |
| (Rm,Mpa) |
Rp0.2,Mpa |
% |
HV |
GW |
BW |
| 0 |
410-540 |
- |
≥35 |
90-160 |
0 |
0 |
| 1/4H |
510-620 |
- |
≥10 |
145-220 |
2 |
1 |
| 1/2H |
590-695 |
- |
≥5 |
180-240 |
3 |
2 |
| H |
685-835 |
- |
≥2 |
210-270 |
6 |
2 |
| OT |
1100-1380 |
≥960 |
≥3 |
350-400 |
2 |
0.8 |
| 1/4HT |
1180-1400 |
≥1030 |
≥2 |
360-430 |
3 |
1 |
| 1/2HT |
1240-1440 |
≥1100 |
≥2 |
370-440 |
4 |
2 |
| HT |
1270-1480 |
≥1140 |
≥1 |
380-450 |
6 |
3 |
Chemical composition
| Be |
1.8-2.0 |
| Ni+Co |
≥0.2 |
| Ni+Co+Fe |
≤0.6 |
| Cu+Be+Ni+Co+Fe |
≥99.5 |