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Contact Us GLOBAL Search this site 日本語 中文 Corporate Overview Products and Services Research and Development Sustainability News Corporate Overview Message from the Management Philosophy Quick Guide to JX Advanced Metals Business Segments Corporate Data Organization and Executive Officers Corporate History Operating Sites and Group Companies Long-Term Vision and Medium- to Long-term Business Strategies and Business Targets Purchasing Information Products and Services Search by Category Copper Alloys and Special Steel Products Copper Foil Sputtering Targets Compound Semiconductors and Crystal Materials Metal and Compound Powders Special Ceramic Powders High Purity Metals Surface Treatment Agents Upinorg (high-purity copper sulfate) Electroless UBM Plating Service MoSi2 Heater Shielding Materials Nonferrous Metals and Chemical Products Products Under Development Search by Keyword Semiconductors and Sensors Circuit Boards Assembly Displays Batteries and Energy Additive Manufacturing Connectors Magnetic Devices Electromagnetic Shielding Communications Optics Camera Modules Piezoelectricity Thermal Control Research and Development Our Core Technologies Contributing to Societal Growth and Innovation Initiatives for Co-creation Collaboration in the Group SQUARE LAB Sustainability Sustainability Report Toward Net-Zero CO2 Emissions Activities in Environmental Conservation CSR Purchasing News News Release Trade Fairs and Exhibitions MENU HOME Products and Services Copper Alloys and Special Steel Products Copper Alloy Strip Corson Alloys Copper Alloy Strip Corson Alloys Compare Features and Typical Applications Corson Alloys For decades we have conducted R&D aimed at developing new Corson alloys and improving existing ones. The result is a wide network of patents covering Corson alloys with superior strength, conductivity, and bend formability, for which we have achieved the top share in the industry. A Corson alloy is a special type of copper alloy made using nitrogen and silicon as the principal alloying elements. Taking advantage of the combination of high strength, conductivity, and bend formability, these alloys are used mainly for connector contacts and lead frames in personal computers, mobile phones, and other electronic devices. Today this alloy has become an indispensable metal material in our data-driven society. 動画を再生する Alloy name Composition Features Applications C7025 Cu-3.0Ni-0.65Si-0.15Mg Representative Corson alloy Connectors, lead frames, CPU sockets NKC164 Cu-1.6Ni-0.4Si-0.5Sn-0.4Zn Corson alloy with excellent balance of strength and electrical conductivity Wiring harnesses, connectors NKC286 Cu-2.8Ni-0.6Si-0.5Sn-0.4Zn Corson alloy with strength exceeding that of C7025 Connectors, wiring harnesses NKC286S Cu-2.8Ni-0.6Si-0.5Sn-0.4Zn Lower Young's modulus than NKC286 Connectors, wiring harnesses NKC388 Cu-3.8Ni-0.8Si-0.1Mg-0.13Mn Highest level of strength among Corson alloys Connectors, switches NKC164E Cu-1.6Ni-0.35Si High-conductivity Corson alloy with spring properties Connectors, battery terminals NKC4419 Cu-1.9Co-0.44Si High-conductivity Corson alloy with spring properties Connectors, battery terminals NKC4820 Cu-1.5Co-0.5Ni-0.48Si High-strength, high-conductivity Corson alloy with spring properties Connectors, battery terminals NKC1816 Cu-1.8Ni-1.0Co-0.6Si-0.15Cr Corson alloy with good balance of strength and electrical conductivity Connectors, CPU sockets Compare Composition and Properties Corson alloy composition and properties Chemical Composition (wt%) Copper Alloy Name C7025 NKC164 NKC286 NKC286S NKC388 NKC164E NKC4419 NKC4820 NKC1816 Chemical Composition (wt%) Cu : Rest Ni : 3.0 Si : 0.65 Mg : 0.15 Cu : Rest Ni : 1.6 Si : 0.4 Sn : 0.5 Zn : 0.4 Cu : Rest Ni : 2.8 Si : 0.6 Sn : 0.5 Zn : 0.4 Cu : Rest Ni : 2.8 Si : 0.6 Sn : 0.5 Zn : 0.4 Cu : Rest Ni : 3.4~4.2 Si : 0.70~1.0 Mg : 0.05~0.3 Mn : 0.11~0.20 Cu : Rest Ni : 1.6 Si : 0.35 Cu : Rest Co : 1.9 Si : 0.44 Cu : Rest Co : 1.5 Ni : 0.5 Si : 0.48 Cu : Rest Ni : 1.0~2.0 Co : 1.0~2.0 Si : 0.5~1.0 Cr : 0.09~0.2 Physical Properties Copper Alloy Name C7025 NKC164 NKC286 NKC286S NKC388 NKC164E NKC4419 NKC4820 NKC1816 Specific Gravity g/cm3 8.82 8.87 8.87 8.87 8.82 8.89 8.85 8.86 8.72 Modulus of Elasticity GPa 131 127 127 110 123 XSH: 135 (TD*) USH: 120 USH: 140 (TD*) 120 127 120 125 Electrical Conductivity %IACS (@20&＃8451;) 45 TM04S:50 43 41 41 SH: 38 ESH, XSH, USH: 34 55 65 60 47 SH:50 Specific Resistance n&＃937;&＃183;m(@20&＃8451;) 38 41 42 42 SH: 45.4 ESH, XSH, USH: 50.7 30 27 29 37 Thermal Conductivity W/(m&＃183;K) 180 170 165 165 SH: 160 ESH, XSH, USH: 143 240 260 245 198 Thermal Expansion Coefficient ×10-6 /K 17.6 17.6 17.4 17.4 17.6 17.7 17.8 17.6 - Poisson's ratio 0.33 0.33 0.33 0.33 0.33 0.33 0.33 0.33 0.33 Mechanical Properties Copper Alloy Name C7025 NKC164 NKC286 NKC286S NKC388 NKC164E NKC4419 NKC4820 NKC1816 Tensile Strength (MPa) O   - - - - - - - - 1/4H   - - - - - 520-650 (600) - - 1/2H TR02 607-726 (650) 560-680 (640) 710-840 (780) 730-870 (800) - - - - - H TM02 650-740 (725) 620-740 (680) 760-890 (830) 800-940 (880) - 590-680 (630) 590-720 (670) - - EH TM03 680-760 (744) 680-800 (730) 810-940 (880) - - 620-760(680) - (740) - SH TM04 750-840 (814) - - - 890-990 (940) - - - (840) ESH TM04S 710-830 (785) - - - 930-1030 (980) - - - 840-940 (880) XSH   - - - 970-1090 (1030) - - - - USH   - - - 970-1090 (1030) TD:1070-1190 (1130) - - - - 0.2% Yield Strength (MPa) O   - - - - - - - - 1/4H   - - - - - 370-500 (480) - - 1/2H TR02 550min (575) 520-670 (610) 690-830 (760) 695-835 (765) - - - - - H TM02 585min (644) 580-730 (660) 740-880 (810) 775-915 (845) - 540-680 (610) 570-700 (650) - - EH TM03 655min (710) 640-790 (720) 790-930 (860) - - 600-740 (670) - (710) - SH TM04 740min (800) - - - 860-960 (910) - - - (820) ESH TM04S 700min (772) - - - 900-1000 (950) - - - 810-910 (850) XSH   - - - 940-1060 (1000) - - - - USH - - - - - 940-1060 (1000) TD:1040-1160 (1100) - - - - Elongation (%) O   - - - - - - - - 1/4H   - - - - - 10min (17) - - 1/2H TR02 6.0min (10.0) 5min (8.0) 3min (6.0) 3min (7.0) - - - - - H TM02 10.0min (13.0) 3min (6.0) 2min (4.0) 1min (2.0) - 5min (12) 2min (8) - - EH TM03 5.0min (9.0) 1min (4.0) 1min (2.0) - - 2min (5) - (3) - SH TM04 1.0min (3.0) - - - 1.0min (3.0) - - - 1.0min (3.0) ESH TM04S 1.0min (3.8) - - - 1.0min (2.5) - - - 1.0min (2.0) XSH   - - - 1.0min (2.0) - - - - Vickers Hardness (Hv) O   - - - - - - - - 1/4H   - - - - - 160-210 (180) - - 1/2H TR02 180-220 (204) 160-230 (190) 200-270 (230) 215-285 (250) - - - - - H TM02 190-240 (215) 170-240 (200) 210-280 (245) 250-320 (285) - 160-220 (200) 180-220 (200) - - EH TM03 200-250 (235) 200-270 (220) 230-300 (260) - - 170-230 (210) - (230) - SH TM04 225-275 (248) - - - 250-310 (280) - - - (250) ESH TM04S 210-260 (246) - - - 265-325 (295) - - - (270) XSH   - - - 285-350 (325) - - - - USH - - - - 285-350 (325) - - - - Standard specs. (Typical values) Bend Formability Copper Alloy Name C7025 NKC164 NKC286 NKC286S NKC388 NKC164E NKC4419 NKC4820 NKC1816 Minimum Bend Radius / t Badway 1/2H TR02 4.0 0.0 0.0 0.0 - - 1/4H : 0.0 - - H TM02 0.0 0.0 0.5 1.0 - 0.0 0.7 - - EH TM03 1.0 1.5 1.7 - - 0.2 -   - SH TM04 5.0 - - - 1.0 - - -   ESH TM04S 1.0 - - - 3.0 - - -   Bad way 90°W-shape Bending Width=10mm Explanation of technical terms W-shaped Bending, Minimum Bend Radius U-shaped Bending, Minimum Bend Radius Good Way / Bad Way Contact Information From the Web Contact Form Inquiries accepted 24 hours a day. 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