Alloy M25 UNS Number C17300
Alloy M25 by Materion Brush Performance Alloys offers the strength properties of Alloy 25, with the added benefit of being "free machining.” Alloy M25 rod and wire contain a small amount of lead to provide an alloy tailored for automatic machining operations. Lead promotes formation of finely divided chips thus extending cutting tool life. This alloy has good electrical conductivity and high strength relative to other alloys. It has good fatigue strength and stress relaxation resistance. Alloy M25 increases tool life, resulting in less overall equipment down-time, and ultimately, a lower total machining cost.
Markets and Applications for Alloy M25
Machined male or female contacts in the electronics, aircraft and automotive industries.
The production of turned parts for the watch industry.
Contact for circular connectors
Alloy M25 Chemical Composition
Beryllium – 1.80-2.0%
Lead – 0.20-060%
Cobalt, nickel and iron – 0.6% max
Cobalt and nickel – 0.2% max
Copper – balance
Alloy M25 Physical Properties
Elastic Modulus - 19 x 106 psi (131 Gpa)
Density - 0.302 lb/in3 (8.36 g/cm3)
Poisson's Ratio - 0.3
Relative Magnetic Permeability - <1.01
Electrical Conductivity – 22-28% IACS (12.8-16.3 MS/m)
Thermal Conductivity 70°F / 20°C - 60 BTU/ft•hr•°F (105 W/m•K)
Thermal Conductivity 200°F / 100°C - 75 BTU/ft•hr•°F (130 W/m•K)
Coefficient of Thermal Expansion - 9.7 ppm/°F (17.5 ppm/°C)
Specific Heat (Heat Capacity) 70°F / 20°C - 0.086 BTU/lb•°F (360 J/kg K)
Specific Heat (Heat Capacity) 200°F / 100°C - 0.097 BTU/lb•°F (406 J/kg K)
Melting Range - 1600 - 1800 °F (870 - 980 °C)
Alloy M25 Mechanical Properties
Mechanical properties may vary by product size, form and temper. Please see individual data sheets for values.
Available Forms, Sizes and Tolerances of Alloy M25
Alloy M25 is available in the following forms, as well as in a variety of tempers. See data sheet for sizes and tolerances.
Applicable Specifications & Standards for Alloy M25
Rod - ASTM B 196, MIL-C-21657, EN 12164
Wire - ASTM B 197, EN 12164, EN 12166
Resources and Related links
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