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Nitinol is a nickel-titanium alloy distinguished from other materials by its shape memory and superelastic characteristics. The term “shape memory” describes the phenomenon of "remembering" its original shape and that returns to its pre-deformed shape when heated. The superelasticity refers to the enormous elasticity of the alloys, which can be 10 times greater than the best stainless steels used in medicine today. The superelastic quality of Nitinol, along with its biocompatibility, makes it ideal for making many types of medical devices that are implanted in the body. An application familiar to many of us is the stent, a device that supports blood vessels and keeps them open. Nitinol’s superelasticity allows a medical device, such as a stent or a heart valve, to be compressed into a shape that fits inside a catheter. The catheter is positioned at the correct location in the body, the device is released, and it returns to its original shape. One customer of SuZhou HaiChuan Metals was developing a medical device made by nitinol wire. Members of the research team were developing a special device that went into the patients’ esophagus - the device would include a ball end to avoid scratching the esophagus and a curve shape design bending to one side away from the heart for protection purpose. On the other end was a plastic hook serving as a handle for the doctor to hold on.   Since the device is used in the human body, impurities must be avoided and welding between each part should be reduced to minimum or none or avoided (the original design of the head ball was welded to one end of the wire). After the customers posed the above requirements of the medical device they were trying to design and put into medical practice, engineers at HC soon put together our proposal to achieve the goal. The biggest challenge - allowing the wire to go into the patient’s mouth in a small size but soon expand to wire in the patient's body was solved through the use of nitinol materials. engineers proposed to store the “shape memory wire” in ice water to lock the small shape, once the wire goes into the human body and encounters heat in the esophagus (around 37 degrees), it will slowly restore the expand its shape back to the original design. To our client’s delightment, engineers at HaiChuan paid special attention to details and proposed to melt the wire into the ball end to avoid incidents of the ball dropping in the patient’s body when in use. Here is a picture of the melted ball by the wire end: After the first sample arrived, the customer had one problem: the wire at the handle is too soft for the device practitioner to turn and manipulate when the wire already enters the body. Being that soft it would simply twist and not be able to adjust the direction of the curve in the body. To combat this issue, our engineers brought up another creative yet reliable solution: Separating the straight (including the looped end) and the curve sections. By welding two parts together, the whole piece still looks continuously. With this method, the straight wire becomes much stronger and the curve remains “shape memory”. Even though the cost of doing so is higher by an additional $3.98/ea, the customer accepted the proposal because it solved the functionality issues and made the device more user and patient-friendly. The customer accepted our proposal of splicing and used it in the following orders. Unlike the previous top ball and wire welds, the ends of the welds are very strong and therefore do not fall off, which provides safety for the clinical application. Although the cost of the device has increased, the excellent performance and long service life of the device have also increased, saving the lifetime usage cost by 40%. HaiChuan is a trusted manufacturer of nitinol wire (nickel-titanium alloy wire) from various grades of nickel-titanium alloy commonly used in medical applications as well for other various applications. For medical technology companies with similar applications, please send us your request to sales@SAMaterials.com for any needs on nitinol.

Introduction： molybdenum a refractory metal with remarkable properties. Molybdenum has found its way into a wide range of industrial applications. This article delves into the unique properties and diverse applications of Mo across various industries, highlighting its critical role in modern technology and manufacturing processes. Properties of Molybdenum：   1.Physical Properties: Appearance: Silvery-white metal with a gray cast Melting Point: 2,623 degrees Celsius (4,753 degrees Fahrenheit) Boiling Point: 4,639 degrees Celsius (8,382 degrees Fahrenheit) Density: 10.28 grams per cubic centimeter State: Solid at room temperature 2.Chemical Properties: Molybdenum is a transition metal and is relatively unreactive, but it reacts with oxygen at high temperatures to form molybdenum trioxide (MoO₃). It is resistant to corrosion and does not react with most acids, including hydrochloric acid, sulfuric acid, and nitric acid, although it can be attacked by certain oxidizing agents at elevated temperatures. Molybdenum exhibits multiple oxidation states, with the most common being +2, +3, +4, +5, and +6. 3.Mechanical Properties: Molybdenum has a high melting point, making it suitable for applications involving high temperatures, such as in the aerospace and electrical industries. It has excellent strength and mechanical stability at elevated temperatures. Molybdenum has a low coefficient of thermal expansion, which means it expands and contracts less with temperature changes compared to many other metals. 4.Uses: Molybdenum is commonly used as an alloying element in steel and other alloys to improve their strength, hardness, and resistance to corrosion and high temperatures. It is used in the production of stainless steel, tool steel, high-speed steel, and superalloys. Molybdenum is also used as a catalyst in the petroleum refining industry and as a lubricant in certain applications. Other applications of molybdenum include electronics, electrical contacts, filaments for light bulbs, and nuclear energy applications.   Applications of Molybdenum：   1.Alloying Agent: Molybdenum is extensively used as an alloying element in steel and other alloys. It enhances the strength, hardness, and corrosion resistance of the alloys. Molybdenum-containing steels are used in construction, automotive, aerospace, and other structural applications. 2.Stainless Steel Production: Molybdenum is a crucial element in the production of stainless steel. It improves the stainless steel's resistance to corrosion, particularly in aggressive environments such as marine applications, chemical processing plants, and food processing equipment. 3.High-Speed Steel: Molybdenum is a key component in high-speed steels, which are used in cutting tools such as drills, saw blades, and milling cutters. High-speed steels with molybdenum can withstand high temperatures and maintain their hardness and sharpness even at high cutting speeds. 4.Superalloys: Molybdenum is utilized in superalloys, which are high-performance alloys used in extreme conditions such as aerospace turbine engines, gas turbines, and nuclear reactors. Molybdenum enhances the high-temperature strength and creep resistance of these alloys. 5.Electronics and Electrical Applications: Molybdenum is used in electrical contacts and electrodes due to its excellent electrical conductivity and resistance to arc erosion. It is also employed in the production of thin films for semiconductor devices, flat panel displays, and photovoltaic cells. 6.Catalysts: Molybdenum-based catalysts are widely used in the petroleum refining industry for processes such as hydrodesulfurization (HDS) and hydrocracking. These catalysts help remove sulfur and other impurities from petroleum products and improve their quality. 7.Lubricants: Molybdenum disulfide (MoS₂) is a solid lubricant with exceptional anti-friction and anti-wear properties. It is used in applications where high temperatures, extreme pressures, and low speeds are present, such as in automotive engine parts, bearings, and gears. 8.Nuclear Energy: Molybdenum-99 (Mo-99) is a radioactive isotope of molybdenum used in nuclear medicine for medical imaging and diagnosis. Mo-99 is the parent isotope of technetium-99m, which is widely used in diagnostic imaging procedures.   Conclusion： In a word, molybdenum , with its impressive properties including high melting point, thermal conductivity, strength, and corrosion resistance, plays a vital role in numerous industries. From aerospace to electronics, high-temperature furnaces to medical devices, and nuclear applications to solar energy, molybdenum provide the reliability and performance needed in the most demanding of environments. As technology continues to advance, the versatile applications of these pipes are expected to expand, further solidifying its position as a critical material in modern industry and technology.   SuZhou HaiChuan metals is a reliable supplier of molybdenum . We also offer high-quality Mo products and alloys including TZM Tube and Mo-La Tube. Customization is welcome as well. Send us an inquiry if you are interested.