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C17200 Beryllium Copper Alloy 25 Supplier
High-Strength CuBe2 Bar, Rod, Plate, Strip and Wire
UNS C17200, commonly known as Alloy 25, CuBe2 or CDA 172, is a precipitation-hardening copper-beryllium alloy selected where very high strength, fatigue resistance, wear resistance, dimensional stability and useful electrical conductivity are required.
Xi'an Dongmeng Group Co., Ltd. supplies C17200 beryllium copper in bar, rod, plate, sheet, strip, coil, wire, forged and custom-cut forms for electrical connectors, precision springs, aerospace components, oil and gas tools, industrial bearings, mould components and high-performance mechanical parts.
01Solution-Treated
02Cold-Worked
03Mill-Hardened
04Precipitation-Hardened
What Is C17200 Beryllium Copper?
C17200 is a wrought copper-beryllium alloy containing approximately 1.8% to 2.0% beryllium. It develops its highest mechanical properties through precipitation hardening and can achieve strength and hardness levels comparable with many steels while retaining better electrical and thermal conductivity than conventional high-strength steels.
The alloy is commonly selected for components that must combine several properties rather than maximize only one property:
High tensile and yield strength
Excellent spring and fatigue performance
Good resistance to wear and galling
Useful electrical and thermal conductivity
Good corrosion resistance
Low magnetic permeability
Good dimensional stability after suitable heat treatment
Suitability for precision forming and machining under controlled conditions
Peak-aged Alloy 25 can exceed 200 ksi or approximately 1380 MPa tensile strength, with hardness approaching HRC 45 and electrical conductivity around 22% IACS or higher, depending on product form and condition.
Available C17200 Product Forms
| Product Form | Applicable Standard | Typical Supply Capability | Common Applications |
| Round Bar and Rod | ASTM B196/B196M | Custom diameter and cut length | Bushings, bearings, shafts, fasteners and oilfield parts |
| Plate and Sheet | ASTM B194 | Cut plate, sheet and machined blank | Mould components, wear plates, aerospace and industrial parts |
| Strip and Coil | ASTM B194 | Precision slit width, coil or cut strip | Spring contacts, connectors, clips and stamped parts |
| Wire | ASTM B197/B197M | Coil, spool or custom package | Springs, electrical contacts and precision wire components |
| Forgings and Extrusions | ASTM B570 | Custom section subject to drawing | Heavy-duty components and special mechanical parts |
| Custom-Cut Parts | By drawing and purchase specification | Saw cutting, profiling or machining blank | Prototype and production components |
Typical dimensions shown on the website represent supply capability only. Final availability and tolerances depend on product form, temper, manufacturing route, quantity and applicable specification.
Product Size Range
C17200 Bar and Rod
Diameter: 3–200 mm
Length: 1,000–6,000 mm
Forms: Round, square, rectangular and custom-cut bar
Services: Saw cutting, straightening, grinding and machining blanks
C17200 Plate and Sheet
Thickness: 0.5–50 mm
Width: 300–1,500 mm
Length: 1,000–4,000 mm
Services: Cut-to-size, surface protection, flatness inspection and custom blanks
C17200 Strip and Coil
Thickness: 0.05–1.50 mm
Width: 3–600 mm
Services: Precision slitting, edge conditioning, coil weight control and protective packing
C17200 Wire
Diameter: 0.10–10 mm
Supply Form: Coil, spool or custom package
Requirements to Confirm: Diameter tolerance, surface condition, temper, coil weight and mechanical properties
All dimensions are subject to confirmation at the quotation stage.
C17200 Chemical Composition
| Element | Composition |
| Beryllium, Be | 1.80–2.00% |
| Nickel + Cobalt | 0.20% minimum |
| Nickel + Cobalt + Iron | 0.60% maximum |
| Aluminum, Al | 0.20% maximum |
| Silicon, Si | 0.20% maximum |
| Copper + Named Elements | 99.50% minimum |
Chemical composition requirements shall be confirmed according to the applicable material standard and purchase specification. Actual heat analysis values are provided on the material test certificate.
C17200 Temper and Condition Selection
Selecting the correct condition is essential because strength, formability, hardness and conductivity change significantly after cold working and precipitation hardening.
| Condition | General Characteristics | Recommended Use |
| Solution-Treated, TB00 | Highest formability and lower strength | Complex forming followed by customer heat treatment |
| Cold-Worked, TD01–TD04 | Increased strength with reduced ductility | Stamping, spring forming and components requiring subsequent aging |
| Precipitation-Hardened, TF00 | High strength developed from solution-treated material | Machined parts, bars, rods and general high-strength components |
| Cold-Worked and Aged, TH01–TH04 | Very high strength and hardness | Springs, contacts, wear parts and highly loaded components |
| Mill-Hardened, TM Conditions | Controlled properties supplied by the mill | Precision strip parts where post-forming heat treatment is undesirable |
Temper codes and available mechanical properties depend on product form and applicable specification. Always identify the required temper on the inquiry and purchase order.
Typical Mechanical and Physical Properties
The following values are general technical references and must not be used as final acceptance criteria.
| Property | Typical Reference |
| Maximum Tensile Strength | Above 1,380 MPa / 200 ksi in selected aged conditions |
| Peak Hardness | Approximately HRC 40–45 |
| Electrical Conductivity | Approximately 22% IACS in precipitation-hardened condition |
| Density | Approximately 8.26 g/cm³ |
| Thermal Conductivity | Approximately 107 W/m·K |
| Elastic Modulus | Approximately 127 GPa |
| Solidus Temperature | Approximately 866°C |
| Liquidus Temperature | Approximately 982°C |
Actual mechanical properties vary by bar, rod, plate, strip or wire form, section size, cold reduction and heat-treatment condition. Final certified values shall be based on the applicable standard and MTC.
Why Buyers Select C17200 Alloy 25
High Strength with Useful Conductivity
C17200 provides substantially higher strength than conventional copper alloys while maintaining useful electrical and thermal conductivity. It is therefore suitable for load-bearing electrical contacts, current-carrying springs and high-performance connector components.
Excellent Fatigue and Spring Performance
The combination of high yield strength, elastic performance and stress-relaxation resistance makes C17200 suitable for repeated-load springs, diaphragms, clips, retaining rings and precision contact parts.
Wear and Galling Resistance
Age-hardened C17200 offers good wear resistance and resistance to adhesive seizure. Common mechanical applications include bushings, bearings, valve components, wear plates and heavily loaded moving parts.
Non-Magnetic Performance
Its low magnetic permeability makes C17200 suitable for instrument housings, measurement equipment, downhole tools and components operating near magnetic sensing systems.
Flexible Property Control
The alloy can be supplied in formable solution-treated conditions, cold-worked conditions, precipitation-hardened conditions or mill-hardened strip conditions. This allows buyers to select the required balance between formability, final strength and conductivity.
Key Features & Advantages
Highest strength among all copper alloys
Exceptional fatigue and wear resistance
Good electrical and thermal conductivity
Excellent stress relaxation resistance
Suitable for extreme environments
Non-magnetic and corrosion-resistant
Stable properties after age hardening
C17200 Applications
Electrical and Electronic Components
High-reliability electrical connectors
Spring contacts and current-carrying springs
Switch and relay components
Fuse clips and contact bridges
Semiconductor and test-probe components
Precision terminals and stamped contact parts
Aerospace and Precision Engineering
Aerospace bushings and bearings
High-strength fasteners
Retaining rings and lock washers
Instrument housings
Precision diaphragms and bellows
Navigational and measurement components
Oil and Gas Equipment
Downhole instrument housings
Drilling and logging-tool components
Valve seats and valve stems
Pressure-resistant mechanical parts
Non-magnetic components
Wear-resistant bushings and bearings
Industrial and Mould Components
Injection mould inserts
Heat-transfer components
Wear plates
Shafts and spline components
Pump and valve parts
Rolling-mill and heavy-equipment components
Safety and Special Tools
C17200 is used in selected low-sparking and non-magnetic tools. The suitability of a finished tool for hazardous environments must be verified according to the tool design, manufacturing process and applicable safety requirements.
C17200 vs Other Beryllium Copper Grades
| Grade | Main Advantage | Conductivity Level | Typical Selection |
| C17200 / Alloy 25 | Highest-strength general-purpose BeCu grade | Moderate | Springs, connectors, aerospace, oilfield and wear parts |
| C17300 | Similar strength with improved machinability | Moderate | Screw-machined connectors, fasteners and precision turned parts |
| C17500 | Moderate strength with higher conductivity | High | Welding equipment, electrical components and heat-transfer parts |
| C17510 | High conductivity with useful mechanical strength | High | High-current contacts, resistance-welding components and switchgear |
Choose C17200 when maximum mechanical strength and fatigue performance are more important than achieving the highest possible conductivity.
Choose C17500 or C17510 when electrical or thermal conductivity is the primary requirement and moderate strength is sufficient.
Processing and Customization Services
Xi'an Dongmeng Group Co., Ltd. can coordinate processing according to drawings and purchase specifications.
Bar and plate saw cutting
Strip and coil slitting
Straightening and leveling
Surface grinding
Edge conditioning
Custom-length cutting
Machining blanks
Hardness and conductivity verification
Heat-treatment condition confirmation
Protective film and special export packing
Machining allowance, grain direction, edge condition, surface finish and post-machining heat treatment should be confirmed before production.
Inspection & Quality Assurance
Inspection requirements can be specified according to the product form, application and purchase order.
Heat-number and batch traceability
Chemical composition verification
Diameter, thickness, width and length inspection
Straightness and flatness inspection
Tensile and yield-strength testing
Elongation testing
Hardness testing
Electrical conductivity testing
Surface and edge inspection
Grain-size or microstructure inspection when required
Ultrasonic or eddy-current testing when applicable
Third-party inspection by an agreed inspection agency
Material test certificate and inspection report
Do not state that every test is automatically included. The required inspection scope should be agreed before order confirmation.
Export Packing
Packaging is selected according to product form and shipment method.
Bar and Rod: Bundled, moisture-protected and packed in wooden cases or on reinforced skids.
Plate and Sheet: Protective paper or film, moisture barrier, reinforced wooden pallet or wooden case.
Strip and Coil: Moisture-proof wrapping, edge protection, inner-core protection and wooden pallet or wooden case.
Wire: Spool or coil protection, moisture barrier and reinforced outer packaging.
Shipping marks, heat numbers, alloy grade, temper, dimensions, gross weight and net weight can be shown on the package label according to the purchase order.
Important Beryllium Processing Safety Information
C17200 is supplied as a solid copper-beryllium alloy. Industrial operations such as grinding, polishing, welding, melting or aggressive machining may generate airborne particles containing beryllium.
Processors must review the applicable safety data sheet and comply with local occupational health regulations. Suitable engineering controls may include enclosed processing, local exhaust ventilation, effective dust collection, exposure monitoring, controlled cleaning procedures and appropriate personal protective equipment.
Do not use compressed air or dry sweeping to clean beryllium-containing dust.
Why Choose Xi'an Dongmeng Group Co., Ltd.
Multiple product forms from one supply source
ASTM and AMS material coordination
Custom dimensions and cut-to-size service
Temper and application review before quotation
Heat-number traceability and inspection documentation
MTC and optional third-party inspection
Moisture-resistant export packaging
Support for prototype and production requirements
International shipment and documentation experience
Need high-strength UNS C17200 Beryllium Copper Alloy in bar, rod, plate, strip, foil, or wire?
Contact us for best factory prices and fast delivery.
For a faster quotation, include:
C17200 + Product Form + Temper + Dimensions + Tolerance + Quantity + Standard + Application
Our address
Room 4107, Runfeng Building, Sanqiao New Street, Weiyang District, Xi'an City, Shaanxi Province
Phone Number
+86 15769214734
C17200 Beryllium Copper FAQ
Is C17200 the same as Alloy 25?
Yes. UNS C17200 is commonly known as Alloy 25, CuBe2, CDA 172 or Beryllium Copper 172.
What is the difference between C17200 and C17300?
C17200 is the standard high-strength Alloy 25 grade. C17300 is a free-machining variation designed for improved machining performance. The final grade should be selected according to mechanical, machinability and compliance requirements.
What is the maximum strength of C17200?
Selected precipitation-hardened C17200 products can exceed approximately 1,380 MPa or 200 ksi tensile strength. Actual values depend on product form, size and temper.
Which standard applies to C17200 strip?
C17200 plate, sheet and strip are commonly ordered to ASTM B194. The exact temper, thickness tolerance, edge condition and mechanical properties must be stated on the purchase order.
Which standard applies to C17200 rod and bar?
C17200 rod and bar are commonly supplied to ASTM B196/B196M. AMS specifications may also apply to aerospace requirements.
Can you supply C17200 in a formable condition?
Yes. Solution-treated and selected cold-worked conditions can be supplied for forming followed by precipitation hardening. The required forming process and final property target should be reviewed before ordering.
Do you supply mill-hardened C17200 strip?
Mill-hardened strip conditions may be available depending on thickness, width, quantity and property requirements. Send the required temper code, tensile strength, hardness and conductivity for confirmation.
Can C17200 be machined?
C17200 can be machined using suitable industrial methods. However, machining, grinding and polishing may generate hazardous beryllium-containing particles. Processors must review the SDS and implement appropriate exposure controls.
Can C17200 be welded?
Certain welding processes can be used, but weldability depends on section size, condition and final property requirements. Welding may affect local mechanical properties and may also create occupational exposure risks. A qualified welding and safety procedure is required.
What information is required for a quotation?
Please provide the alloy grade, product form, standard, temper, dimensions, tolerance, quantity, surface condition, mechanical property requirements, inspection requirements and end application.
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