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C17200 Copper (CDA 172)

C17200 is also known as Alloy 25 and is the most commonly utilized beryllium copper alloy and is notable for exhibiting the highest strength and hardness compared to commercial copper alloys. Its strength and hardness is similar to that of steel. C17200 copper's ultimate tensile and Rockwell hardness properties in a peak aged condition are in the 200 ksi range and RC 45 respectively (electrical conductivity 22% IACS minimum).

Typical Uses for C17200 Beryllium Copper:

Electrical Switch / Relay Blades Fuse Clips Switch Parts
Relay Parts Connectors Spring Connectors
Current Carrying Contact Bridges Belleville Washers
Navigational Instruments Clips
Washers Fasteners Lock Washers
Retaining Rings Roll Pins Screws

Pumps Springs Electrochemical
Shafts Non Sparking Safety Tools Flexible Metal Hose
Housings for Instruments Bearings Bushings
Valve Seats Valve Stems Diaphragms
Springs Welding Equipment Rolling Mill Parts
Spline Shafts Pump Parts Valves
Bourdon Tubes Wear Plates on Heavy Equipment Bellows
Firing Pins


Sizes Available From JMH

SOLID BAR: 1/4" . 6" diameter

RECTANGLES: 3/8" x 1/2" . 1" x 3" thickness x width

SQUARES: 3/8" . 3" square

PLATES: 2" . 5" thickness

DISCS & RINGS: orged to size

HONED TUBES: up to 4" OD


End Product Specification
Bar AMS 4650, 4651, 4533, ASTM B194, B196, MILITARY MIL-C-21657, SAE J463, J461
Extrusions ASTM B570
Forgings AMS 4650, ASTM B570
Plate ASTM B194
Rod AMS 4650, 4534, 4533, 4651, ASTM B196, MILITARY MIL-C-21657, SAE J463, J461
Rod, Forging AMS 4650
Sheet ASTM B194
Strip ASTM B194, SAE J463, J461
Tube, Seamless AMS 4535, ASTM B643
Wire AMS 4725, ASTM B197, SAE J463, J461

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