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UNS C17000 Beryllium Copper Alloy Supplier
Dongmeng Group supplies UNS C17000 beryllium copper, also known as Alloy 165, in sheet, strip, plate, rod, bar, wire and custom-processed forms.
C17000 is a precipitation-hardening copper alloy designed for applications requiring a combination of high mechanical strength, fatigue resistance, electrical conductivity, wear resistance and dimensional stability.
The alloy is commonly selected for electrical contacts, springs, diaphragms, precision components, aerospace hardware, plastic mould components, pump parts and other demanding industrial applications.
What Is UNS C17000 Beryllium Copper?
UNS C17000 is a wrought copper-beryllium alloy containing approximately 1.7% beryllium.
It can be supplied in a softer solution-treated condition for forming and machining, or in precipitation-hardened and mill-hardened tempers for higher strength and hardness.
The final performance of C17000 depends strongly on the product form, thickness, cold-work level and heat-treatment condition. Buyers should therefore specify both the alloy number and the required temper when requesting a quotation.
C17000 should not be confused with C17200. Although both are high-strength copper-beryllium alloys, C17000 has a lower nominal beryllium content.
C17000 Chemical Composition
| Element | Composition |
| Beryllium, Be | 1.60–1.85% |
| Cobalt, Co | 0.20% minimum |
| Nickel + Cobalt | 0.20% minimum |
| Nickel + Iron + Cobalt | 0.60% maximum |
| Aluminium, Al | 0.20% maximum |
| Silicon, Si | 0.20% maximum |
| Copper + Named Elements | 99.5% minimum |
| Copper, Cu | Remainder |
Chemical composition should be verified through the material certificate supplied with the order.
Available Product Forms and Standards
| Product Form | Applicable Standard | Typical Supply Condition |
| Plate, Sheet and Strip | ASTM B194 | TB00, TD, TF, TH or TM tempers |
| Rolled Bar | ASTM B194 | According to order specification |
| Rod and Straight Bar | ASTM B196/B196M | TB00, TD04, TF00 or TH04 |
| Wire | ASTM B197/B197M | Temper according to diameter and application |
| Forgings and Extrusions | ASTM B570 | TB00 or TF00 |
| Custom Components | Customer drawing | Material and temper confirmed before production |
When an ASTM specification is stated without a UNS alloy designation, the standard may default to C17200. Purchase orders should therefore clearly state UNS C17000.
Standard Supply Range
| Product | Typical Available Range |
| Sheet and Plate Thickness | 0.3–25 mm |
| Sheet and Plate Width | 500–1250 mm |
| Sheet and Plate Length | 1000–4000 mm |
| Strip Thickness | 0.05–1.5 mm |
| Strip Width | 3–500 mm |
| Rod and Bar Diameter | 3–150 mm |
| Rod and Bar Length | 1000–6000 mm |
| Wire Diameter | 0.1–10 mm |
| Custom Components | According to drawings |
The actual manufacturing range depends on the required temper, tolerance, surface condition and order quantity. Critical dimensions should be confirmed before placing an order.
Typical Physical Properties
| Property | Typical Value |
| Density | 8.41 g/cm³ |
| Electrical Conductivity | Approximately 22% IACS in precipitation-hardened condition |
| Thermal Conductivity | Approximately 107 W/m·K |
| Modulus of Elasticity | Approximately 127 GPa |
| Modulus of Rigidity | Approximately 50 GPa |
| Solidus Temperature | Approximately 866°C |
| Liquidus Temperature | Approximately 982°C |
| Machinability Rating | Approximately 20 |
These figures are general reference values and should not be used as final engineering acceptance criteria.
Typical Mechanical Properties by Temper
The following values illustrate how heat treatment and cold working can change the properties of C17000 flat products.
| Temper | Condition | Tensile Strength | Yield Strength | Elongation |
| TB00 | Solution Treated | Approx. 483 MPa | Approx. 221 MPa | Approx. 45% |
| TF00 | Precipitation Hardened | Approx. 1138 MPa | Approx. 1000 MPa | Approx. 7% |
| TH01 | 1/4 Hard + Aged | Approx. 1186 MPa | Approx. 1034 MPa | Approx. 5% |
| TH02 | 1/2 Hard + Aged | Approx. 1255 MPa | Approx. 1103 MPa | Approx. 4% |
| TH04 | Hard + Aged | Approx. 1310 MPa | Approx. 1172 MPa | Approx. 3% |
| TM04 | Mill Hardened, Hard | Approx. 979 MPa | Approx. 841 MPa | Approx. 12% |
| TM06 | Mill Hardened, Extra Hard | Approx. 1158 MPa | Approx. 1020 MPa | Approx. 6% |
Mechanical properties vary with thickness, product form, testing direction and governing specification. Final acceptance should be based on the applicable standard and purchase order.
Understanding C17000 Tempers
TB00 - Solution Treated
TB00 offers relatively low strength and high ductility. It is suitable when substantial forming or machining is required before final precipitation heat treatment.
TD Tempers - Solution Treated and Cold Worked
TD01, TD02 and TD04 represent increasing levels of cold work. Higher cold work generally increases strength while reducing elongation.
TF and TH Tempers - Precipitation Hardened
TF00 is solution treated and precipitation hardened. TH tempers combine cold work and precipitation hardening to achieve higher strength.
TM Tempers - Mill Hardened
Mill-hardened material is supplied with controlled mechanical properties and may eliminate the need for the buyer to carry out final aging.
The correct temper should be selected according to forming requirements, final strength, conductivity, dimensional tolerance and production process.
C17000 vs C17200 Beryllium Copper
| Item | UNS C17000 | UNS C17200 |
| Common Designation | Alloy 165 | Alloy 25 |
| Nominal Beryllium | Approximately 1.7% | Approximately 1.9% |
| Alloy Category | High-strength copper beryllium | High-strength copper beryllium |
| Strength Level | Depends on temper and form | Depends on temper and form |
| Main Standards | ASTM B194, B196, B197, B570 | ASTM B194, B196, B197, B570 |
| Purchasing Note | Must be stated explicitly | Often the default alloy when UNS number is omitted |
Do not substitute C17200 for C17000 without engineering approval. Material composition, temper, mechanical properties and customer specifications should be reviewed before substitution.
Key Advantages
High Strength After Aging
Precipitation hardening significantly increases tensile strength, yield strength and hardness while retaining useful copper-alloy conductivity.
Fatigue and Spring Performance
C17000 is suitable for cyclic components such as springs, diaphragms, electrical contacts and resilient precision parts.
Electrical and Thermal Conductivity
The alloy provides significantly better conductivity than conventional steels while offering much higher strength than pure copper.
Wear and Corrosion Resistance
C17000 offers useful resistance to wear, corrosion and stress relaxation in demanding mechanical and electrical environments.
Forming and Machining Flexibility
Solution-treated material can be blanked, drilled, formed, bent, tapped and turned before final hardening.
Typical Applications
UNS C17000 is used for:
Electrical connectors and contact components
Relays, switches and conductive springs
Spring clips and retaining components
Diaphragms and bellows
Aerospace and precision mechanical parts
Pump, valve and rolling-mill components
Plastic injection mould inserts
Mould components requiring heat transfer
Bushings and wear-resistant parts
Semiconductor test and electronic components
Non-magnetic precision components
Custom CNC-machined copper-alloy parts
Material selection should be based on actual load, operating temperature, conductivity, corrosion environment and fatigue-life requirements.
Custom Processing Services
Dongmeng Group can supply raw material or semi-finished components according to customer drawings.
Available services include:
Precision cutting and sawing
Sheet and strip slitting
Surface grinding
Straightening
CNC turning
CNC milling
Drilling and tapping
Forming and bending
Edge deburring
Heat-treatment coordination
Custom protective packaging
For precision components, buyers should provide drawings, tolerances, required temper, testing requirements and final application information.
Quality Control
Our quality inspection process can include:
Material grade and heat-number verification
Chemical composition certificate review
Dimensional and tolerance inspection
Surface and edge inspection
Hardness testing
Tensile testing when required
Electrical conductivity testing when specified
Straightness and flatness inspection
Final packaging verification
MTC EN 10204 3.1, Certificate of Conformity and third-party inspection can be arranged according to the purchase specification.
Beryllium Copper Machining Safety
C17000 contains beryllium. Operations that generate airborne dust, fumes or fine particles require appropriate occupational controls.
Grinding, dry sanding, welding, high-speed machining and similar operations should only be carried out after reviewing the product Safety Data Sheet and applicable workplace regulations.
Recommended controls may include:
Local exhaust ventilation
Wet machining methods where appropriate
Enclosed dust collection
HEPA-filtered cleaning equipment
Suitable respiratory and protective equipment
Exposure monitoring
Proper waste handling and housekeeping
Do not use compressed air or dry sweeping to clean fine machining dust.
Customers are responsible for establishing machining procedures that comply with applicable health, safety and environmental regulations.
Why Choose Dongmeng Group?
Dongmeng Group is a manufacturer and integrated supplier of industrial metal materials and custom-processed components.
Our supply network includes five manufacturing centers, 18 production lines, 10 warehouses and an international sales and quality-control team.
We support global buyers with:
Multiple copper-alloy product forms
Standard and custom dimensions
Material and temper verification
Tight dimensional tolerances
OEM drawing-based processing
MTC and inspection documentation
Third-party inspection
Protective export packaging
FOB, CFR, CIF and DDP shipping support
Technical communication before production
Request a Quote
For an accurate C17000 quotation, please provide:
Product form
UNS grade
Required temper
Thickness or diameter
Width and length
Quantity
Dimensional tolerance
Surface requirements
Testing standard
Processing drawing
Delivery destination
Company: Dongmeng Group
Email: office@dongmjd.com
Phone / WhatsApp: +86 157 6921 4734
Frequently Asked Questions
Is C17000 the same as C17200?
No. Both are high-strength copper-beryllium alloys, but C17000 has a nominal beryllium content of approximately 1.7%, while C17200 has a nominal content of approximately 1.9%.
What is Alloy 165?
Alloy 165 is a common trade designation for UNS C17000 copper-beryllium alloy.
Which standard applies to C17000 sheet and strip?
ASTM B194 applies to C17000 plate, sheet, strip and rolled bar.
Which standard applies to C17000 rod and bar?
ASTM B196/B196M applies to C17000 rod and straight bar products.
Can C17000 be heat treated?
Yes. C17000 is a precipitation-hardening alloy. The required aging process depends on the initial temper, section thickness and governing material specification.
Can C17000 be machined?
Yes. It can be drilled, turned, milled and tapped. Operations that generate airborne particles must use suitable beryllium exposure controls.
Do you provide custom C17000 parts?
Yes. Dongmeng Group can provide cutting, grinding, CNC machining, drilling, forming and drawing-based component processing.
What should be included in the purchase order?
Specify UNS C17000, product form, governing standard, temper, dimensions, tolerances, quantity, testing requirements and required documentation.
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