252 ert series, medium duty radiation resistant catalog 1308389 dimensions are in millimeters dimensions are shown for usa: 1-800-522-6752 south america: 55-11-2103-6000 revised 6-07 and inches unless otherwise reference purposes only. canada: 1-905-470-4425 hong kong: 852-2735-1628 specified. specifications subject mexico: 01-800-733-8926 japan: 81-44-844-8013 www.tycoelectronics.com to change. c. america: 52-55-1106-0803 uk: 8706-080-208 note: all part numbers are rohs compliant. buchanan terminal blocks physical properties effect of radiation on physical properties the effects of radiation (neutron and gamma particles) on ryton r-4 material have been studied. since ryton, as an engineering plastic, may fill applications in nuclear installations these effects are important. the test results show no effects on physical properties by these relatively high exposures to gamma and neutron radiation. there is no indication from these data of crosslinking or degradation of the ryton r-4 material. note: determination of the suitability of the ert series blocks for particular applications rests solely with customers. lr25557 e63810 catalog part description number number strap screw 0721ert 1437394-9 tubular clamp 0725ert 1-1437394-6 tubular screw 0724ert 1-1437394-1 end section 0730ert 2-1437394-0 housing: ryton (polyphenylene sulfide) astm test density 100 lbs./ft.3 d1505-68 tensile strength 19,500 psi d638-72 elongation 1.3% d638-72 flexural modulus 1,700,000 psi d790-91 flexural strength 29,000 psi d790-91 compressive strength 21,000 psi d695-69 izod impact strength unnotched, 1/8 specimen 8.0 ft. lbs./in. notched, 1/8 specimen 1.4 ft. lbs./in. rockwell hardness r-123 d785-65 water absorption 0.05% d570-63 heat distortion temp. @ 264 psi 500?f d648-72 specific heat, 24 hrs. @ 25?c 0.25 btu/lb./?f thermal conductivity 2.0 btu-in./h-ft.2 f coefficient/linear thermal exp. 2.5 x 10-5 in./in./? f flammability, ul 94 v-0 dielectric strength 350 volts/mil d149-64 dielectric constant, 25?c 1 khz 3.9 d150-70 1mhz 3.8 dissipation factor, 25?c 1khz 0.0010 d150-70 1mhz 0.0013 conditions in reactor core in water pool temperature 35?c 30?c radiation mainly neutrons mainly gamma intensity 1010 ergs g-1 (c) 109 ergs g-1 (c) used particle detectors calorimeter and ionization chamber activation detectors radiation dose flexural strength modulus of psi elasticity, psi 0 28,700 1,900,000 a. neutron 5 x 10 rad 29,000 1,910,000 1 x 10 rad 28,900 1,880,000 b. gamma 5 x 10 rad 29,700 1,810,000 1 x 10 rad 30,200 1,840,000 5 x 10 rad 28,500 1,820,000 ryton is a registered trademark of chevron phillips chemical company.
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