Easy Cut Beryllium Copper – ALLOY M25 (UNS C17300)

Alloy M25 ( UNS 17300) or Easy Cut Beryllium Copper is a free-machining high-performance copper-beryllium alloy. It is an excellent substitute for Alloy 25 if enhanced machinability is required.

ypical Uses
Electrical: Contact Bridges, Electrical Switch and Relay Blades, Electric Motor Components, Navigational Instruments, Clips, Electrical Connectors, Connectors, Relay Parts, Switch Parts, Fuse Clips

Fasteners: Washers, Screws, Bolts, Retaining Rings, Roll Pins, Lock Washers, Fasteners

Industrial: Spline Shafts, Pump Parts, Valves, Non Sparking Safety Tools, Flexible Metal Hose, Bushings, Rolling Mill Parts, Electrochemical Springs, Pumps, Shafts, Springs, Bellows, Welding Equipment, Diaphragms, Bourdon Tubing

Ordnance: Firing Pins

Density: 0.298 lb/in3 at 68 F

Specifications
Product Type Temper Type
Bar ASTM B196Military Mil-C-21657
Rod ASTM B196Military Mil-C-21657
Wire ASTM B197

Easy cut beryllium copper – alloy M25 ( UNS C17300 ) or Lead Beryllium Copper (Cube2Pb)–C17300 (CDA 173) is identical to a version of lead-containing alloy C17200 and achieves the same exceptional strength after hardening. C17300 rods contain a small amount of lead to provide an alloy tailored for automatic machining operations and the Lead promotes formation of finely divided chips thus extending cutting tool life.

 

TYPICAL APPLICATIONS:

Commercial applications for this engineering material include:

Corrosion-resistant components; Current carrying springs; Welding electrodes; Electrical and electronic connectors.

Available Sizes: Custom Diameter & Sizes, Random Mill lengths

 

Chemical Composition:

Be: 1.85-2.10%

Co+Ni: 0.20% Min.

Co+Ni+Fe: 0.60% Max.

Lead: 0.20-0.60%

Cu: Balance

 

Typical Physical Properties:

Density (g/cm3): 8.36

Density before age hardening (g/cm3): 8.25

Elastic Modulus (kg/mm2 (103)): 13.40

Thermal Expansion Coefficient (20 °C to 200 °C m/m/°C): 17 x 10-6

Thermal Conductivity (cal/(cm-s-°C)): 0.25

Melting Range (°C): 870-980

 

Note:

1). the units are based upon Metric.

2). the typical physical properties apply to age hardened products.

International Specification:

Rods/Bars/Tubes: ASTM B196, QQ-C-530

Wires: ASTM B197, QQ-C-530

Plates: ASTM B194

European Standards: DIN 2.1248, CW102C to EN

 

Note:

ASTM: American Society for Testing and Materials

QQ: Federal Specification

Note: Unless otherwise specified, material will be produced to ASTM.

Mechanical Properties:

 

Most Commonly Temper Used:

Rods/Bars/Tubes: A(TB00),H(TD04),AT(TF00),HT(TH04)

Wires: A(TB00),1/4 H(TD01),1/2 H(TD02),3/4H(TD03),H(TD04)

Plates: A(TB00),H(TD04),AT(TF00),HT(TH04)

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