MAXIMUM SOLUTIONS Mill-Max Now Off ers Nine Sizes of Beryllium Nickel Spring Contacts for High Temperature Applications. Mill-Max off ers nine contacts ( 19, 24, 25, 26, 27, 33, 38, 56, 58) made from Beryl- lium Nickel Alloy 360 (UNS N03360.) Contacts made from Beryllium Nickel are recommended for receptacle applications where the operat- ing temperature exceeds 150C. Some common applications for these contacts are found in: the oil industry for down-hole wells and exploration Test & Burn-in sockets for stress testing elec- tronic devices (i.e. chips ) high temperature com- mercial lighting fi xtures (e.g. Halogen lamps) and autoclave sterilization for the medical industry. BeNi is suitable for continuous use up to 250C, and periodic use up to 350C, without signifi cant loss of its spring properties (see graph.) For use below 150C, Mill-Max has an extensive range of 29 standard Beryllium Copper (Alloy 172) spring contacts. These nine contacts are available assembled in a wide range of standard precision-machined receptacles (discrete sockets for printed circuit boards) and various types of socket assemblies (DIP, SIP etc.) These con- tacts are the internal spring member of the highly reliable, two piece Mill-Max receptacle and are not sold as individual items. Properties of BeNi Alloy 360 Chemical composition: Ni 97.6%, Be 1.9%, Ti 0.5% 100 Modulus of Elasticity: 27-30x106 psi 90 Tensile Strength: 245x10 psi min. 80 38 (BERYLLIUM NICKEL) Yield Strength (0.2% off set): 200x10 psi min. 70 CONTACT Hardness: 49 Rockwell C 60 50 Contact Material and Stress 40 Relaxation at High Temperature 30 Mill-Max contacts are made from either beryllium copper 20 30 (BERYLLIUM COPPER) or beryllium nickel that has been heat treated to achieve 10 CONTACT ultimate spring properties. The graph illustrates how beryl- 0 lium copper loses its spring properties over time at a high 100 1000 10 temperature (225C). Thus, for burn-in applications and EXPOSURE TIME (HOURS) 225C continuous operation above 150C, beryllium nickel should be substituted for beryllium copper. (11/12 -- PR548) Mill-Max Mfg. Corp. 190 Pine Hollow Road, Oyster Bay, NY 11771 516-922-6000 Fax: 516-922-9253 www.mill-max.com % OF INITIAL NORMAL FORCED E N I H N CONTACT DATA PINS 1000.0 25 CONTACT 25 CONTACT FOR .015-.020 DIAMETER PINS (d=.003) 3-FINGER, GROUP A (see page 214) 100.0 INITIAL INSERTION FORCE INSERTION FORCE 2nd CYCLE EXTRACTION FORCE G OPERATING RANGE 10.0 MATING PIN DIAMETER (inches) The insertion/extraction/normal force characteristics above were derived using 30 microinch gold plated contact and polished steel gauge pins having a bullet-shaped tip. The curves represent typical average values they are best used to compare the differences between similar size CONTACT MATERIAL: contacts and to guide you in selecting one that is suitable for your application. Your results may vary, so for your BERYLLIUM NICKEL Alloy 360, Heat Treated specification, we encourage you to obtain complimentary samples for your evaluation. 1000 38 CONTACT 38 CONTACT FOR .015-.025 DIAMETER PINS (d=.004) 4-FINGER, GROUP C (see page 214) 100 INITIAL INSERTION FORCE INSERTION FORCE 2nd CYCLE EXTRACTION FORCE D OPERATING RANGE 10 MATING PIN DIAMETER (inches) The insertion/extraction/normal force characteristics above were derived using 30 microinch gold plated contact and polished steel gauge pins having a bullet-shaped tip. The curves represent typical average values they are best used to compare the differences between similar size CONTACT MATERIAL: contacts and to guide you in selecting one that is suitable for your application. Your results may vary, so for your BERYLLIUM NICKEL Alloy 360, Heat Treated specification, we encourage you to obtain complimentary samples for your evaluation. 1000.0 19 CONTACT 19 CONTACT FOR .020-.032 DIAMETER PINS (d=.003) 6-FINGER, GROUP K (see page 214) 100.0 INITIAL INSERTION FORCE INSERTION FORCE 2nd CYCLE EXTRACTION FORCE G OPERATING RANGE 10.0 MATING PIN DIAMETER (inches) The insertion/extraction/normal force characteristics above were derived using 30 microinch gold plated contact and polished steel gauge pins having a bullet-shaped tip. The curves represent typical average values they are best used to compare the differences between similar size CONTACT MATERIAL: contacts and to guide you in selecting one that is suitable for your application. Your results may vary, so for your BERYLLIUM NICKEL Alloy 360, Heat Treated specification, we encourage you to obtain complimentary samples for your evaluation. www.mill-max.com 516-922-6000 PR 548 O C I A S I M C E FORCE (grams) FORCE (grams) FORCE (grams) 0.018 0.011 0.011 0.019 0.012 0.012 0.020 0.013 0.021 0.014 0.013 0.022 0.015 0.023 0.014 0.016 0.024 0.017 0.015 0.025 0.018 0.026 0.019 0.016 0.027 0.020 0.028 0.017 0.021 0.029 0.022 0.018 0.030 0.023 0.031 0.024 0.019 0.032 0.025 0.033 0.020 0.026 R P