Copper beryllium strips C17200 for relays stamping parts and
switches
Product brief introduction:
Beryllium cooper strip is widely used in producing all kinds of
micromotor’s brush, switch, relay, cell phone battery,
spring,connector, attemperator’s leaf spring which with high
strength, high elasticity, high hardness and high wearing feature.
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.
Features:
1. Strength: by age-hardening, can reach up to 1500N/mm2 tensile
strength, so it be used as elastic material which can tolerate high
bending stress.
2. Electrical conductivity: According to different alloys,
specification, about 20-70% IASC (international annealed copper
standard) can be used as high density voltaic elastic material.
3. Machinability: Before age hardening, the material can be
complicated formed processing.
4. Fatigue Strength: Have excellent anti-fatigue properties(Can be
operate repeatedly), so be widely used in long-life and
high-reliability accessories.
5. Heat resisting property: Can keep small Stress relaxation rate
in the high temperature condition, so can be used under a large
temperature range.
6. Corrosion resistance: In range of all copper alloy, it has
better corrosion resistance than Copper-Nickel Alloy,scarcely
initiate corrosion by environmental implication.
Beryllium copper strip Mechanical Properties:
| Symbol or Brands | Chemical Composition | Temper | Tensile Strength (N/mm2) | Elongation (%) | Endurance | Vickers Hardness (HV) | Electric Conductivity
(%IACS) |
| C1720 | Be:1.8-2.0 Ni+Co≥0.20 Ni+Co+Fe≤0.6 Cu+Be+Co+Fe ≥99.5 | Before age-hardening |
| O | 410-540 | ≥35 | - | 90-160 | ≥17 |
| 1/4H | 510-620 | ≥10 | - | 45-220 | ≥16 |
| 1/2H | 590-695 | ≥5 | - | 180-240 | ≥15 |
| H | 685-835 | ≥2 | - | 210-270 | ≥15 |
| After age-hardening |
| OT | 1100-1380 | ≥3 | ≥960 | 325-400 | ≥22 |
| 1/4HT | 1180-1400 | ≥2 | ≥1030 | 350-430 |
| 1/2HT | 1240-1440 | ≥2 | ≥1100 | 360-440 |
| HT | 1270-1480 | ≥1 | ≥1140 | 380-450 |
| Spread (Standard) |
| OM | 685-885 | ≥18 | ≥480 | 220-270 | ≥17 |
| 1/4HM | 735-930 | ≥10 | ≥550 | 235-285 |
| 1/2HM | 815-1010 | ≥8 | ≥650 | 260-310 |
| HM | 910-1110 | ≥6 | ≥750 | 295-345 |
| XHM | 1100-1290 | ≥2 | ≥930 | 340-390 |
| XMHS | 1210-1400 | ≥2 | ≥1030 | 360-410 |
Usage:
Casting beryllium bronze: (Cu-2Be-0.5Co-0.3Si, Cu-2.6Be-0.5Co-0.3Si, Cu-0.5Be-2.5Co, etc.)
For explosion-proof tools, various molds (inner inserts for plastic
injection molding dies, integral cavities for blow molds,
automotive molds), bearings, bushings, bushings, gears and various
electrodes
Processing beryllium bronze: (Cu-2Be-0.3Ni, Cu-1.9Be-0.3Ni-0.2Ti) is mainly used as a variety
of advanced elastic components, especially requiring good
conductivity, corrosion resistance, wear resistance, cold
resistance, various no magnetic components, used as a large number
of bellows, diaphragms, bellows, micro switches, etc.
Technical Specification
Density | Hardness after Quenching | Tensile Strength | Yield Strength (0.2%) | Elastic Modulus |
Conductivity | Thermal Conductivity at 20℃ |
| g/cm | HRC | MPa | MPa | GPa | IACS | w/m.k |
| 8.3 | ≥36-42 | ≥1000 | 1035 | 128 | 18% | 105
|
Grade and temper for C17200 CuBe2 Beryllium copper strip
Grade: C17200, C172, CDA172, QBe2, CuBe2, CB101
Temper: O(M), 1/4H(Y4), 1/2H(Y2), H(Y), HH(T)
Characteristic of C17200 CuBe2 Beryllium copper strip
• High Strength
• Good Formability
• Good corrosion resistance
• Easy welding and soldering
• Fatigue Resistant
