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 |
Typical application for C17200 beryllium copper alloys:
Electrical industry: Electrical Switch and relay blades, fuse clips, switch parts, relay parts, connectors, spring connectors, contact bridges, Belleville washers, navigational instruments, clips
Fasteners: Washers, fasteners, lock washers, retaining rings, roll pins, screws, bolts
Industrial: Pumps, springs, electrochemical, shafts, non-sparking safety tools, flexible metal hose, housings for instruments, bearings, bushings, valve seats, valve stems, diaphragms, springs, welding equipment, rolling mill parts, spline shafts, pump parts, valves, bourdon tubes, wear plates on heavy equipment, bellows, mining parts
Available sizes:
Custom diameter & sizes, random mill lengths
Available products (forms):
Round tube, pipes, hollow bars
Custom shapes are available upon request.
B).
CuBe2 - C17200 (Alloy 25) Beryllium Copper Tubes
Chemical Composition:
Be: 1.85-2.10%
Co+Ni: 0.20% Min.
Co+Ni+Fe: 0.60% Max.
Cu: Balance
Note: Copper plus additions equal 99.5% minimum.
C).
CuBe2 - C17200 (Alloy 25) beryllium copper tubes
Typical physical properties:
Density (g/cm3): 8.36
Density before age hardening (g/cm3): 8.25
Elastic modulus (kg/mm2 (103)): 13.40
Thermal expansion Coefficient (20 °C to 200 °C m/m/°C): 17 x 10-6
Thermal conductivity (cal/(cm-s-°C)): 0.25
Melting range (°C): 870-980
Note:
1). the units are based upon Metric.
2). the typical physical properties apply to age hardened products.
D).
CuBe2 - C17200 (Alloy 25) Beryllium Copper Alloys
International Specification
Pipes/Tubes: ASTM B196,251,463; SAE J461,463; AMS 4533,4534,4535; AMS4650,4651;
RWMA Class 4
European standards: CuBe2, Alloy 25, QBe2, BrB2, DIN 2.1247, CW101C to EN