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ISO 9001 Certified National Electronic Alloys Specialty Service Center • Dedicated to Customer Service & Quality Comparison Chart (For reference only) CHEMICAL COMPOSITION % ASTM F15 Alloy 36 Alloy Percentage () 52 Alloy 48 Alloy 46 Alloy 42 Alloy () Iron Nominal Bal Bal Bal Bal Bal Bal Nickel Nominal 29 50.5 48 46 41 35 Nominal 17 0.50 Max. 0.50 0.60 0.80 0.80 0.80 0.60 Silicon Max. 0.20 0.30 0.30 0.30 0.30 0.40 Max. 0.04 0.05 0.05 0.05 0.05 0.05 Aluminum Max. 0.10 0.10 0.10 0.10 0.10 0.10 Max. 0.10 0.10 Zirconium Max. 0.10 0.10 Max. 0.10 0.10 Max. 0.20 Max. 0.20 0.25 0.25 0.25 0.25 0.25 Molybdenum Max. 0.20 Phosphorus Max. 0.025 0.025 0.025 0.025 0.015 Max. 0.025 0.025 0.025 0.025 0.015 PHYSICAL PROPERTIES ASTM F15 Alloy 36 Alloy Property Unit (Kovar) 52 Alloy 48 Alloy 46 Alloy 42 Alloy (Invar) Lbs/in² 0.302 0.300 0.298 0.295 0.293 0.291 Specific Gravity 8.36 8.30 8.25 8.17 8.12 8.05 Specific Heat 0.12 0.12 0.12 0.123 °F 815 986 880 860 716 535 °F 2640 2600 2600 2600 2600 2600 Electrical Resistivity Ohm-cir mil/ft 294 260 290 277 430 495 BTU/In/ft²/hr/°F 120 97 90 79.2 74.5 72.6

Linear coefficient of cm. per cm. per °C x 10–6 Temp. range – °C Kovar - 1 52 Alloy - 2 48 Alloy - 3 46 Alloy - 4 42 Alloy - 5 42-6 Alloy - 6 Invar - 7 30-150 — — — — — — 1.2 - 2.7 30-200 — — — — — — — 30-300 — — — — 4.0 - 4.7 — — 30-350 — — — 7.1 - 7.8 — 8.5 - 9.2 — 30-400 4.6 - 5.2 — 8.2 - 9.2 — — — — 30-425 — — — — — 9.7 - 10.4 — 30-450 5.1 - 5.5 9.6 - 10.1 — — 6.7 - 7.4 — — 30-500 — — — 8.2 - 8.9 — — — 30-550 — 10.2 - 10.7 9.6 - 10.3 — — — —

MECHANICAL PROPERTIES (As Annealed) Tensile Strength PSI x 1000 75 80 79 80 82 65 Strength PSI x 1000 50 40 36 35 40 40 Elongation % in 2” 30 35 30 30 30 35 Hardness Rockwell B 80 80 80 80 80 80 Elastic Modulus psi x 10(-6) 24 21 21.5 20.5 Kovar • Invar 36 • 42 Alloy • 45/46 Alloy • 48/49 Alloy • 52 Alloy • Sheilding Alloys • Hymu 80 • Nickel 200/201

1 18 1A OF ELEMENTS 8A 1 2 1 H He 2 13 14 15 16 17 Helium 1.01 2A Key 3A 4A 5A 6A 7A 4.00 3 4 5 6 7 8 9 10 11 2 Li Be Element symbol B C N O F Ne Lithium Na Boron Carbon Nitrogen Oxygen Fluorine Neon 6.94 9.01 Sodium Element name 10.81 12.01 14.01 16.00 19.00 20.18 22.99 11 12 Average atomic mass 13 14 15 16 17 18 3 Na Mg Al Si P S Cl Ar Sodium Magnesium 3 4 5 6 7 8 9 10 11 12 Aluminum Silicon Phosphorus Sulfur 22.99 24.31 3B 4B 5B 6B 7B 8B 1B 2B 26.98 28.09 30.97 32.07 35.45 39.95 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 4 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Gallium Germanium Bromine Krypton 39.10 40.08 44.96 47.87 50.94 52.00 54.94 55.85 58.93 58.69 63.55 65.39 69.72 72.61 74.92 78.96 79.90 83.80 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 5 Rb Sr YZrNbTMo cRuRhAPd gCdInSnSbTeIXe Rubidium Strontium Yttrium Zirconium Molybdenum Technetium Rhodium Cadmium Indium Tin Antimony Tellurium Iodine 85.47 87.62 88.91 91.22 92.91 95.94 (98) 101.07 102.91 106.42 107.87 112.41 114.82 118.71 121.76 127.60 126.90 131.29 55 56 57 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 6 Cs Ba La Hf Ta WReOsIrPtAuHgTlPbBiPoAt Rn Cesium Barium Lanthanum Hafnium Tantalum Mercury Thallium Lead Bismuth Polonium Astatine Radon 132.91 137.33 138.91 178.49 180.95 183.84 186.21 190.23 192.22 195.08 196.97 200.59 204.38 207.2 208.98 (209) (210) (222) 87 88 89 104 105 106 107 108 109 7 Fr Ra Ac Rf Db Sg Bh Hs Mt Francium Radium Actinium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium (223) (226) (227) (261) (262) (266) (264) (269) (268)

58 59 60 61 62 63 64 65 66 67 68 69 70 71 Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Cerium Promethium Samarium Europium Terbium Dysprosium Holmium Thulium Ytterbium Lutetium 140.12 140.91 144.24 (145) 150.36 151.96 157.25 158.93 162.50 164.93 167.26 168.93 173.04 174.97 90 91 92 93 94 95 96 97 98 99 100 101 102 103 Th Pa UNpPuAmCmBkCfEsFmNMd oLr Thorium Protactinium Uranium Neptunium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium 232.04 231.04 238.03 (237) (244) (243) (247) (247) (251) (252) (257) (258) (259) (262)

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Molybdenum • OFHC Copper 101/102 • 304/316 Stainless • • Cupro Nickel • 1010