Beryllium Copper Foil Manufacturer and Supplier in India

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Beryllium copper sheet is an alloy that has been selected for applications where a component must be capable of multiple spring returns and remain conductive. It starts life soft enough to stamp, then a short low temperature bake turns it into something close to spring steel, while it stays non magnetic and does not throw sparks. C17200 is the grade most buyers ask for, supplied to ASTM B194. The production of beryllium copper sheet is carried out at Sachin Steel Centre in Mumbai, with a mill test certificate issued for each lot.

This page covers the alloy itself: grades, composition, tempers, properties, and heat treatment. For the individual forms, see our beryllium copper products range.

Table Of Content

Specifications of Beryllium Copper Foil
Chemical Compositions of Beryllium Copper Foil
Beryllium Copper Foil Mechanical Properties
Physical Properties of Beryllium Copper Foil
Weight Chart of Beryllium Copper Foil
Applicational and Industrial Uses of Beryllium Copper Foil
Frequently Asked Questions

Technical Data

Specifications of Beryllium Copper Foil

Feature / Specification	Standard Technical Detail
Governing Specifications	ASTM B194, ASME SB194; General requirements per ASTM B248
Primary/Lead Grade	UNS C17200 (Alloy 25, CDA 172, CuBe2, DIN 2.1247)
High-Conductivity Grades	UNS C17500 (Alloy 10, CuCo2Be), UNS C17510 (Alloy 3, CuNi2Be)
Available Tempers	Solution Annealed (TB00 / A), Cold Worked (TD04 / H), Age Hardened (TF00 / AT, TH04 / HT), and Mill Hardened (TM series)
Thickness Range	4.8 mm to 150 mm (Custom thicker forged/rolled blocks available on request)
Side Dimensions	20 mm x 20 mm up to 1000 mm x 1000 mm (Cut to exact size via precision bandsaw or abrasive waterjet)
Surface Condition	Hot Rolled Mill Surface, Machined/Peeled, Precision Ground, or Bright Polished
Dimensional Tolerances	Standard plate tolerances per ASTM B248; custom saw cut-off tolerances within +1.0 mm / -0.0 mm
Quality Certification	EN 10204 3.1 Mill Test Certificate (MTC), Chemical & Mechanical Test Reports, Ultrasonic Test (UT) Reports

Chemical Compositions of Beryllium Copper Foil

Element	Min (%)	Max (%)	Technical Function
Beryllium (Be)	1.80	2.00	Primary precipitation hardening element
Nickel + Cobalt (Ni + Co)	0.20	—	Prevents grain growth during solution anneal
Nickel + Cobalt + Iron (Ni + Co + Fe)	—	0.60	Impurity control limit
Aluminium (Al)	—	0.20	Residual elemental restriction
Silicon (Si)	—	0.20	Residual elemental restriction
Copper (Cu)	Balance	Balance	Base matrix metal

Beryllium Copper Foil Mechanical Properties

Temper Code	Standard Condition Name	Tensile Strength (MPa)	Yield Strength (0.2% Offset, MPa)	Hardness Range	Engineering Application Note
TB00	Solution Annealed (A)	410 – 540	190 – 275	HRB 45 – 78	Soft condition. Easily machined into complex shapes prior to precipitation age hardening.
TD04	Cold Worked (H)	690 – 830	510 – 620	HRB 96 – 102	Work-hardened state for moderate strength applications without post-heat treatment.
TF00	Age Hardened from Annealed (AT)	1140 – 1345	960 – 1170	HRC 36 – 41	Standard heat-treated state for mould inserts, providing extreme wear and impact resistance.
TH04	Age Hardened from Hard (HT)	1310 – 1550	1100 – 1310	HRC 41 – 45	Maximum achievable strength and surface hardness for severe load-bearing wear plates.
TM Series	Mill Hardened (Pre-Hardened)	850 – 1150	700 – 1000	HRC 26 – 37	Factory pre-hardened; eliminates customer heat treatment steps and dimensional distortion risks.

Physical Properties of Beryllium Copper Foil

Physical Property	Value (Metric Units)	Value (Imperial / Alternate Units)
Density (Annealed, TB00)	8.25 g/cm³	0.298 lb/in³
Density (Age Hardened, TF00)	8.36 g/cm³	0.302 lb/in³
Modulus of Elasticity (Young's)	128 GPa	18.5 × 10⁶ psi
Electrical Conductivity (Aged C17200)	22% IACS min	12.8 MS/m
Electrical Conductivity (Aged C17500/C17510)	45% to 60% IACS	26.1 to 34.8 MS/m
Thermal Conductivity (20°C, Aged)	105 W/m·K	60.7 BTU-ft/hr-ft²-°F
Coefficient of Thermal Expansion (20–200°C)	17.0 × 10⁻⁶/°C	9.4 × 10⁻⁶/°F
Melting Range	865–980°C	1590–1800°F

Weight Chart of Beryllium Copper Foil

Square Size (mm)	5 mm Thick	10 mm Thick	20 mm Thick	25 mm Thick	50 mm Thick	75 mm Thick	100 mm Thick
50 x 50 mm	0.10 kg	0.21 kg	0.41 kg	0.52 kg	1.03 kg	1.55 kg	2.06 kg
100 x 100 mm	0.41 kg	0.83 kg	1.65 kg	2.06 kg	4.13 kg	6.19 kg	8.25 kg
150 x 150 mm	0.93 kg	1.86 kg	3.71 kg	4.64 kg	9.28 kg	13.92 kg	18.56 kg
200 x 200 mm	1.65 kg	3.30 kg	6.60 kg	8.25 kg	16.50 kg	24.75 kg	33.00 kg
250 x 250 mm	2.58 kg	5.16 kg	10.31 kg	12.89 kg	25.78 kg	38.67 kg	51.56 kg
300 x 300 mm	3.71 kg	7.43 kg	14.85 kg	18.56 kg	37.13 kg	55.69 kg	74.25 kg
500 x 500 mm	10.31 kg	20.63 kg	41.25 kg	51.56 kg	103.13 kg	154.69 kg	206.25 kg

Applicational and Industrial Uses of Beryllium Copper Foil

Electrical Connectors
Electronic Switch Contacts
EMI/RFI Shielding Components
Precision Springs
Sensor Components
Relay Components
Battery Contacts
Aerospace Electrical Components

Frequently Asked Questions

What is Beryllium Copper Foil?

Beryllium Copper Foil is a thin copper-beryllium alloy product offering good strength, conductivity, fatigue resistance, and corrosion resistance.

What is Beryllium Copper Foil made of?

It is mainly made of copper with beryllium as the primary alloying element. C17200 typically contains about 1.8% to 2.0% beryllium.

What is UNS C17200 Beryllium Copper Foil?

UNS C17200 is a copper-beryllium alloy, commonly known as Alloy 25, used for high-strength and conductive applications.

What does Alloy 25 mean in Beryllium Copper?

Alloy 25 is the commercial designation commonly associated with UNS C17200 copper-beryllium alloy.

Is Beryllium Copper Foil magnetic?

No. Beryllium copper is essentially non-magnetic, making it suitable for applications where magnetic interference must be avoided.

What is Beryllium Copper Foil used for?

It is used for electrical contacts, connectors, precision springs, switches, sensors, shielding components, and other electronic applications.

Is Beryllium Copper Foil electrically conductive?

Yes. Beryllium copper retains useful electrical conductivity while providing much higher strength than pure copper. C17200 has typical conductivity of about 22% IACS.

Is Beryllium Copper Foil corrosion resistant?

Yes. Beryllium copper offers good corrosion resistance and is also used in marine and subsea applications.

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