Whereas NGK supplies beryllium and beryllium copper products as "raw material" for customers, we also provide these materials in finished shape according to customers' request. With expertise in material process and characters, NGK produces the finished shape at its maximum performance.
Physical Properties of Beryllium Copper
| Items | Unit | High Strength Alloy | |
|---|---|---|---|
| BeA - 25 | BeA - 165 | ||
| Specific Gravity | 8.26 | ||
| Melting Points | °C | 865 - 980 | |
| Coefficent of Thermal Expansion | (20 - 200°C) | 17 x 10-6 | |
| Thermal Conductivity | cal/cm2/cm/sec/°C | 0.26 - 0.31 | |
| Volume Resistivity | μΩ-cm | 6.0 - 7.8 | |
| Electrical Conductivity | lACS% | 22 - 29 | |
| Specific Heat | (30 - 300°C) cal/g/°C |
0.1 | |
| Modulus of Elasticity | kN/mm2 | 127 | |
| Magnetism | none | ||
| Items | Unit | High Conductive Alloy | ||
|---|---|---|---|---|
| BeA - 10 | BeA - 11 | BeA - 50 | ||
| Specific Gravity | 8.75 | 8.75 | 8.83 | |
| Melting Points | °C | 1029 - 1070 | 1004 - 1070 | 1020 - 1110 |
| Coefficent of Thermal Expansion | (20 - 200°C) | 17.6 x 10-6 | 17.6 x 10-6 | 17.6 x 10-6 |
| Thermal Conductivity | cal/cm2/cm/sec/°C | 0.49 - 0.62 | 0.49 - 0.62 | 0.49 - 0.62 |
| Volume Resistivity | μΩ-cm | 3.1 - 3.6 | 2.9 - 3.4 | 2.9 - 3.4 |
| Electrical Conductivity | lACS% | 50 - 60 | 50 - 60 | 50 - 60 |
| Specific Heat | (30 - 300°C) cal/g/°C |
0.1 | 0.1 | 0.1 |
| Modulus of Elasticity | kN/mm2 | 132 | 132 | 132 |
| Magnetism | none | none | none | |
Mechanical Properties of Beryllium Copper
| Alloy | Temper | T/S | 0.2% Yield Strength | Elongation | Hardness |
|---|---|---|---|---|---|
| N/mm2 | N/mm2 | % | HR | ||
| BeA - 25 | A | 410 - 590 | 135 - 205 | 35 - 60 | B 45 - 85 |
| H | 590 - 900 | 520 - 725 | 10 - 20 | B 88 - 103 | |
| AT | 1100 - 1375 | 930 - 1205 | 2 - 8 | C 34 - 45 | |
| HT | 1205 - 1470 | 1030 - 1375 | 2 - 5 | C 37 - 45 | |
| BeA - 165 | A | 410 - 590 | 135 - 205 | 35 - 60 | B 45 - 85 |
| AT | 980 - 1245 | 865 - 1060 | 2 - 10 | C 32 - 40 | |
| BeA - 10 | A | 235 - 390 | 135 - 205 | 20 - 35 | B 20 - 50 |
| AT | 685 - 835 | 490 - 685 | 10 - 25 | B 92 - 105 | |
| BeA - 11 | A | 235 - 390 | 135 - 205 | 20 - 35 | B 20 - 50 |
| AT | 685 - 885 | 490 - 685 | 10 - 25 | B 92 - 105 | |
| BeA - 50 | A | 235 - 390 | 135 - 205 | 20 - 35 | B 20 - 50 |
| AT | 635 - 835 | 490 - 685 | 8 - 20 | B 92 - 105 |
A : Solution Annealed
AT : Solution Annealed + Age Hardened
H : Solution Annealed + Cold Worked
HT: Solution Annealed + Cold Worked + Age Hardened
Comperison of Mechanical Properties
| Alloy | T/S | Rockwell Hardness | Elongation | Electrical Conductivity | Thermal Cond. |
|---|---|---|---|---|---|
| N/mm2 | R&C Scale | % | %IACS | cal/cm2/cm/°C | |
| BeA - 25 | 1175 | C38 | 2 | 25 | 0.25 |
| BeA - 50 | 785 | B96 | 15 | 55 | 0.45 |
| Aluminum Bronze | 735 | B90 | 18 | 10 | 0.13 |
| Copper-Chromium Alloy | 540 | B75 | 15 | 80 | 0.77 |
| High Strength Brass | 590 | B80 | 15 | 20 | 0.22 |
| Phosphor Bronze | 490 | B70 | 20 | 10 | 0.13 |
| 18-8 Stainless Steel | 635 | B80 | 55 | 2 | 0.04 |
| Steel | 490 | B70 | 50 | 8 | 0.1 |
Electrode
Mechanical Parts
| Product Type | Characters | Applications |
|---|---|---|
| Electrode [RWMA Class 3 & 4] | High Strength Electrical Conductivity | Bat Welder Spot Welding Holder Gun Arm Welding Socket, Adapter |
| Mechanical Parts | High Strength Wear Resistance Corrosion Resistance | Aircraft Bushing Die Cast Machine Plunger Tip Cutting Blade for Crusher |
The signals of undersea optical fiber communication cables used for international telephone transmission have been weakened as the signals go forward. In order to re-strengthen the signals, the repeaters are placed at certain intervals. The beryllium-copper is applied as the material of the repeater housing, which requires severe properties, such as corrosion-resistance against seawater and high-strength.
Containing less than 3% beryllium with other elements, beryllium copper ingot has unique characteristics, such as the high strength and spring properties of special steel, as well as non-sparking properties, electric conductivity, wear resistance, and corrosion resistance. Its application is in wide range.
High strength, hardness, wear resistance and excellent fluidity. Ideal for investment, shell, sand, ceramic castings. Meets requirements for Class 4 RWMA resistance welding. Excellent replication of intricate detail.
Chemical Composition
| Be | Co | Cu |
|---|---|---|
| 1.90 - 2.20% | 0.60 - 0.95% | Bal. |
Physical Properties
| Density | g/cm2 at20°C | 8.09 |
|---|---|---|
| Melting Points | °C | 870 - 950 |
| Coefficient of Thermal Expansion | /°C at20 - 300°C | 17x10-6 |
| Thermal Conductivity | cal/cm2/cm/sec/°C | 0.22 - 0.28 |
| Electrical Conductivity | %IACS at20°C | 23 - 28 |
| Specific Heat | cal/g/°C | 0.1 |
| Modulus of Elasticity | kN/mm2 | 127 |
Mechanical Properties
| Tensile Strength | N/mm2 | 1030 - 1205 |
|---|---|---|
| 0.2% Yield Strength | N/mm2 | 825 - 1030 |
| Elongation | % | 1 - 5 |
| Hardness | HR | C 35 - 42 |
Highest strength and hardness of BeCu alloys; excellent wear resistance and fluidity. For extremely fine detail pick-up in ceramic or pressure cast processes. Lowest pouring temperature of BeCu alloys allows most any type of molding process to be used.
Chemical Composition
| Be | Co | Cu |
|---|---|---|
| 2.50 - 2.75% | 0.60 - 0.95% | Bal. |
Physical Properties
| Density | g/cm2 at20°C | 8.09 |
|---|---|---|
| Melting Points | °C | 870 - 950 |
| Coefficient of Thermal Expansion | /°C at20 - 300°C | 17x10-6 |
| Thermal Conductivity | cal/cm2/cm/sec/°C | 0.20 - 0.30 |
| Electrical Conductivity | %IACS at20°C | 17 - 23 |
| Specific Heat | cal/g/°C | 0.1 |
| Modulus of Elasticity | kN/mm2 | 132 |
Mechanical Properties
| Tensile Strength | N/mm2 | 1175 - 1275 |
|---|---|---|
| 0.2% Yield Strength | N/mm2 | 1080 - 1225 |
| Elongation | % | 0.5 - 3 |
| 0.5 - 3 | HR | C 42 - 48 |
Containing less than 3% beryllium, aluminum beryllium master alloy is used in the manufacture of aluminum alloys.
Chemical Composition
| Be | Si | Fe | Cu | Al |
|---|---|---|---|---|
| 2.0 - 2.99% | 0.4% max | 0.4% max | 0.4% max | Bal. |
Weight and Size
New comer "Foil" joined in Beryllium Copper family.
This enables to obtain much finer line/space distance because this has higher strength,
which makes foil thinner, and excellent etchability than existing copper foil.
This foil can also be used as a spring having electrical circuit function.
- Because of high strength, damage during handling processes can be reduced.Thinner and finer circuit can be realized.
- This foil has 60% IACS which is sufficient for practical use in the field.
- As to its high bending properties, it should be most adequate for a portion of circuit board might be used as a spring.
ex. Disk Drive, TAB tape
| Composition (wt%) | Cu 1.8% Ni 0.3% Bu (C17510) |
|---|---|
| Tensile Strength | - 800 N / mm2 |
| Electrical Conductivity | - 60 %IACS (As Copper=100%) |
| Fatigue Properties | 108Cycle.(max.stress 400N/mm single side 0.2t ) |
| Resistance to Heat, Oxide | Good |
| Surface Roughness | Ra 0.055 Rmax 0.47 (Roughed Surface) |
Electron Microstructure
x(10,000)
High Peel Strength
Obtained higher bonding strength with Polyimid by special roughening treatment on the Beryllium Copper surface.
By this treatment, peal strength becomes 1.43kgf/cm, which is same or higher than that of Copper foil.
Copper T/X=3.7
Beryllum Copper T/X=6.1
Good Etchability
Beryllium Copper has better etch factor T/X, therefore, much finer line/space distance can be achieved.
Good Folding Resistance
Beryllium Copper Flexible Board has twice the folding number compared with Copper (8512 vs 4000)
| Test Method : | MIT Method (JISC63471) Bend radius 2.0mm Cover Lay none Line/Space 1.0/1.0mm |
|---|---|
| Test Material : | Beryllium Copper Foil 18µm Copper Foil 18µm (Market) |
Good Bending Properties
Beryllium Copper Flexible Board has 10 to 100 times longer life compared with Copper flexible Board. At the point of 1x108, it does not show any resistance change nor discoloration while Copper flexible board shows such change at the point of 1x106, and finally one of six lines disconnected at 1.7 x106.
Rolled Copper
Flexible Board
Beryllium Copper
Flexible Board
| Test Method : | IPCMethod (JISC63471) Bend radius 2.0mm Cover Lay exist Line/Space 1.5/1.0mm |
|---|---|
| Test Material : | Beryllium Copper Foil 18µm Copper Foil 18µm (Market) |
Beryllium Nickel Alloy strip offers the designer a very high tensile strength, excellent spring properties, outstanding formabilty, high-temperature mechanical properties, plus fatigue and corrosion resistance. This special properties lead to its use in high-temperature springs, electrical contacts and connectors, diaphragms and bellows etc.
(wt%)
| Be | Ti | Ni |
|---|---|---|
| 1.95 | 0.50 | Balance |
| Density (20°C) | g/cm3 | 8.41 |
|---|---|---|
| Coefficient of Liner Expansion (20 - 550°C) |
cm/cm/°C | 14.5 x 10-6 |
| Thermal Conductivity (20°C) |
cal/cm2/cm/°C/sec | 0.12 |
| Electrical Conductivity | %IACS | 7 (Age-Hardened) |
| Modulus of Elasticity | kN/mm2 | 210 |
| Temper | Tensile Strength N/mm2 |
0.2%Yield Strength N/mm2 |
Elongation (%) |
Hardness Rockwell |
|
|---|---|---|---|---|---|
| Before Age | A | 650-890 | 275-480 | 30 min. | HRB 70 - 890 |
| Hardening | 1/4 H | 755-1030 | 445-860 | 15 min. | HRB 90 - 103 |
| After Age | A | 1475 min. | 1030 min. | 12 min. | HRC 47 min. |
| Hardening | 1/4 H | 1580 min. | 1200 min. | 10 min. | HRC 48 min. |
| Plate and Strip | Thickness 0.08 - 1.0mm | Width 5mm - 200mm |
(Note) Product form is basically plate and strip. Please consult us if you need wrought products.
The chart demonstrate that the room temperature strength values of Beryllium Nickel Alloy diminish very little at temperatures up to approximately 400°C.
For instance, note that the yield stregth is 950 N/mm2 at 400°C, about 95% of the room temperature yield strength.
The stress relaxation characteristics of Beryllium Nickel Alloy have been studied up to 200°C.
The data plot indicates when age hardened material is stressed to the 0.2% yield stregth and held at 200°C for 1000 hours, that there is a load loss only about 5%.
| Conc.(%) | Corrosion Resistance | ||
|---|---|---|---|
| 20°C | 100°C | ||
| Sulfuric Acid | 10 | A | C |
| Hydrochloric Acid | 10 | A | D |
| Acetic Acid | 10 | A | D |
| Ammonium Chloride | 10 | B | B |
| Sodium Hydroxide | 50 | A | A |
| Sodium Chloride | 10 | A | C |
| A : 0.1mm/year max. B : 0.1 - 1.0mm/year C : 1.0 - 10mm/year D : Over 10mm/year |
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The table shows approximate corrosion resistance of Beryllium Nickel Alloy.
Beryllium Nickel Alloy provides a good corrosion resistance in various corrosive atmosphere.
