Medical metal equipment
Due to the particularity of the use environment and required characteristics of medical devices, there are strict standards for the selection of Medical metal instruments’ material.
First of all, metal must be relatively malleable, and the malleability is strong to be easy to shape, but not too strong, because once the surgical instrument is formed, it needs to maintain its shape and not change easily. Depending on the type of equipment, the use of metal may need to be quite malleable, because many surgical instruments need to be long and thin in shape, such as scalpels, pliers, scissors, etc.
Secondly, the metal surface of the surgical instruments needs to be tough and shiny, so that the instruments are easy to clean, will not hide bacteria, and effectively prevent human wound infections.
Finally, the metal needs to not chemically react with human tissues, so that it will not cause any metal pollution to the human body during the operation.
Which Metal is better for Medical Instruments?
The most commonly used metals for surgical instruments are: stainless steel, titanium, tantalum, platinum, and palladium.
Stainless steel is one of the most commonly used metal alloys in the manufacture of surgical instruments.
Austenitic 316 (AISI 316L) steel is a commonly used stainless steel and is called “surgical steel”. Because it is a tough metal that is very resistant to corrosion. AISI 301 is the most commonly used metal for manufacturing springs and can be used in medical devices. Stainless steel can withstand high temperatures up to 400°C, which means it can be easily sterilized in an autoclave at 180°C. It also has the advantages of toughness and wear resistance almost comparable to that of carbon steel. Stainless steel has always been the material of choice for metal alloys, but there are other alternatives when necessary.
Titanium is more heat-resistant than stainless steel and can withstand a high temperature of 430°C. When heated and cooled, its expansion and contraction are smaller. Titanium alloy only began to be used as a material for surgical instruments in the 1960s. Titanium alloy has good biocompatibility and elastic modulus closest to human natural bone, and excellent wear resistance, corrosion resistance and formability. Therefore, titanium alloy is one of the most promising biomedical materials and is very suitable for surgery Instruments and implants. The most obvious advantage of titanium is its superior strength. Its tensile strength is almost the same as that of carbon steel, and it is 100% corrosion-resistant, but it is lighter than stainless steel, and is about 40% lighter in the same volume. Titanium has become the metal of choice for orthopedic rods, needles, plates and dental implants. Titanium alloy 6AL-4V is widely used in the production of hip joints, bone screws, knee joints, bone plates, dental implants, and spinal connection components
QY Precision has full experience in SS and Ti alloy material processing, welcome contact us to get quotation based on your drawings.
The medical device industry is different from other mechanical processing industries in three main points:
First, the requirements for machine tools are relatively high. Advanced medical equipment processing equipment such as Swiss automatic lathes, multi-spindle machine tools and rotary tables are completely different from the usual machining centers and lathes. They are very small in size and very compact in structure.
Second, it requires high processing efficiency. For medical equipment and instruments, the most important thing is the processing efficiency, or we say processing cycle.
Third, in terms of the workpiece itself, it is quite different from other mechanical parts. Medical devices implanted in the human body require strictly a very good surface finish, a very high precision, and no any deviation
QY Precision has full experience in processing medical instruments, welcome send us your design drawings for quotation.