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Beryllium Copper Products | Other Beryllium Copper Products

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Fabricated Product

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 Part

Electrode

Electrode

Mechanical Parts

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

Cable Housing

Cable Housing

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.

Beryllium Copper Ingot

Beryllium Copper Ingot

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.

BeA - 20C (Beryllium Copper Alloy 20C)

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

BeA - 275C (Beryllium Copper Alloy 275C)

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

Aluminum Beryllium Ingot

Aluminum Beryllium Ingot

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

  1. 45 - 55g
    30mm x 50mm x 10 - 20mm
  2. 450 - 550g
    70mm x 70mm x 20 - 55mm
  3. 2200 - 2800g
    80mm x 350mm x 50mm

Be Cu Foil

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.

Features

Features

- 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

Characteristics of Beryllium Copper Foil (Alloy 11)

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)

Characteristic of Beryllium Copper Flexible Board

Electron Microstructure x(10,000)

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

Copper T/X=3.7

Beryllum Copper T/X=6.1

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)

Good Folding Resistance
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

Rolled Copper
Flexible Board

Beryllium 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

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.

Beryllium Nickel

Nominal Chemical Composition

(wt%)

Be Ti Ni
1.95 0.50 Balance

Physical Properties

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

Mechanicl Properties

  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.

Size

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.

Short Time High Temperature Properties

Short Time High Temperature Properties

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.

Stress Relaxation

Stress Relaxation

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%.

Corrosion Resistance

  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

The table shows approximate corrosion resistance of Beryllium Nickel Alloy.
Beryllium Nickel Alloy provides a good corrosion resistance in various corrosive atmosphere.

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