Cobalt - Import export

Our Nickel-Iron-Cobalt alloys are engineered to ASTM F15 standards for sealing materials and their specified coefficients of thermal expansion. These materials used primarily for making hermetic seals with harder glasses and ceramics (lids for hybrid packages). Nickel-Iron-Cobalt alloys include F-15 alloy, Kovar ® and Rodar ®. The low levels of impurities in the material reduce the chance of out-gassing over time; a critical role in maintaining the hermetic seal.

Cobalt-based metals are typically alloyed with chrome, nickel, iron and tungsten. They are used in challenging environments in applications that demand high temperature strength and hardness, excellent wear and corrosion resistance.

L-605™ is a nonmagnetic cobalt-based chromium-tungstennickel alloy that has excellent corrosion and oxidation resistance, and high strength at both room and elevated temperatures. Through work hardening, high strength levels can be obtained. L-605™ has a minimal heat treatment response, but can be used in the cold worked and aged condition. Applications include medical implant devices, springs, valves, and engine components for the aerospace industry. As a result of its high tungsten content, L-605TM is radiopaque, which is beneficial for implant medical devices, such as stents. Because of the alloy’s high work hardening rate, only minimal reductions can be taken before solution annealing will be required. L-605TM is very resistant to oxidation and scaling at elevated temperatures, and is nonmagnetic in all conditions. L-605™ is produced by vacuum induction melting followed by electroslag remelting (VIM-ESR), and as such, has a low nonmetallic inclusion level.

Our standard offering of nickel chrome strip products contain a chrome percentage ranging from 20%, 30% and 35% chrome (balance nickel). Silicon can also be added to the product to promote de-oxidation during the welding process The 35% chrome (AMETEK 835) is one of the highest chrome containing products offered in the industry and our high purity process allows for elongations above 45% for even those products containing silicon additions between 1% and 2%.

AMETEK Specialty Metal Products has applied the high purity wrought powder compaction process to Ductile Cobalt Alloys in order to produce multiple ductile cobalt strip products generally used by weld wire manufacturers as sheathing for flux cored and metal cored hardfacing materials. These alloys range from 80 to 95% cobalt with Iron or Iron-Nickel additions to improve ductility for drawing operations.

Havar® is a heat treatable Cobalt base alloy that provides very high strength. The alloy has excellent corrosion resistance and is non-magnetic. Applications have included metal diaphragms for aerospace sensors, metal diaphragms for burst discs, power springs, gap spacers in magnetic heads, and target foils in nuclear physics. Forming cold rolled Havar requires large radius (90° Bend – 8 X thickness) prior to age hardening. The joining can be accomplished using both welding and soldering techniques.The ultimate endurance life is achieved by heat treating the alloy at 1000°F after 80% cold work. The alloy will retain 75% of room temperature strength up to 950°F (Figure 1). Available Sizes: Havar® is available from Hamilton Precision Metals as strip product in thicknesses from 0.0005” to 0.025” (0.0127 mm to 0.635 mm) and widths to 7.5” (190.5 mm). A foil product is available in thicknesses down to 0.000060” and widths of 4.0” (101.6 mm). The material corresponds to UNS R30004.

MP35N®-LTi is a nonmagnetic nickel-cobalt-chromiummolybdenum alloy that has excellent corrosion resistance, can obtain ultrahigh tensile strengths (300 ksi) through work hardening and aging, and has good toughness and ductility. Applications include electrical components, spring contacts, medical instruments, such as stents and implant electronic connectors, chemical, food processing and marine environments. After work hardening, MP35N® alloy can be aged in the temperature range of 800/1200°F for increased strength. MP35N® will only respond to aging if in the work hardened condition. Service temperatures up to 750°F are recommended for work hardened material. MP35N® can be successfully TIG welded. MP35N® is produced by double vacuum melting, and as such, has a low nonmetallic inclusion level. Available Sizes: MP35N®-LTi is available from Hamilton Precision Metals as strip product in thicknesses from 0.0005” to 0.030” (0.0127 mm to 0.762 mm) and widths