Medical stainless steel, stainless steel standards for medical devices?

High-nitrogen biodur 108 stainless steel is a medical implant steel with better mechanical and physical properties.

Biodur108, a nickel-free stainless steel designed and developed for medical implants, exhibits higher strength, better corrosion resistance, and better biocompatibility compared to other medical steels. As shown in Table 1, its nitrogen content, and the nitrogen content of other medical steels is; Its nickel content is not higher than that, while other steels have a nickel content of 9 to 15%. Biodur 108 contains 21-24% manganese, while other steels contain 2-6% manganese.

In high-nitrogen and high-strength steels such as Biodur 108, higher manganese content is required to maintain austenitic structural stability.

Tested to ASTM standards, Biodur 108 exhibits higher strength than any other nickel-containing medical steel, either in solution annealed or cold-deformed form. Its corrosion resistance is comparable to that of Biodur 734 and Biodur 22Cr-13Ni-5Mn, and significantly higher than that of the widely used Biodur 316LS alloy.

In this paper, Biodur 108, 734, 22Cr-13Ni-5, and 316LS were evaluated in terms of strength, corrosion resistance, and biocompatibility.

The approximate composition of stainless steel: iron, chromium and carbon and other elements are combined, household stainless steel is divided into three grades -10, of which 18-10 stainless steel is what we call medical stainless steel, 18 10 and 18 8 in 10 and 8 represent the content of Ni, the former Ni content is high, corrosion resistance is better, so it is more suitable for medical use.

430 stainless steel: iron + more than 12 chromium, can prevent oxidation caused by natural factors, called stainless steel, in the JIS code 430, so it is also called 430 stainless steel. However, 430 stainless steel cannot resist oxidation caused by chemicals in the air, and 430 stainless steel will still oxidize (rust) due to unnatural factors after a period of infrequent use.

18-8 stainless steel: iron + 18 chromium + 8 nickel, can resist chemical oxidation, this stainless steel is 304 in the JIS code, so it is also called 304 stainless steel.

18-10 stainless steel: but there are more and more chemical components in the air, and even 304 will rust in some more polluted places; Therefore, some high-end products will be made of 10 nickel to make it more durable and corrosion-resistant, this kind of stainless steel is called 18-10 stainless steel. In some tableware descriptions, there is a statement similar to "using 18-10 the most advanced medical stainless steel".

The simplest way to distinguish these three kinds of stainless steel is: use a magnet to suck the bottom, the one that can absorb is 430, and the one that can't absorb is 304 and 18-10. However, the rim of the 304 pot, or the front and back ends of the spoon, sometimes can be absorbed because of the magnetism generated by polishing.

So the most accurate way is to suck the bottom.

Similar to food-grade stainless steel, medical-grade stainless steel refers to compliance with the national mandatory standard GB ("Shell Implants|metal materials).

Because medical-grade stainless steel needs to be implanted in the body, in addition to strictly controlling the precipitation of metal ions, it also needs better resistance to pitting and intergranular corrosion, as well as safety performance to prevent the failure and fracture of implanted devices, so there are more stringent requirements for material composition. In order to improve the resistance to intergranular corrosion, it is mandatory that the carbon content is less than or equal to, and the chromium and nickel content are higher than or even reach the upper limit of ordinary stainless steel.

China's mandatory standard for medical-grade stainless steel.

Medical-grade stainless steel has a strict definition of material composition. In addition, the microstructure, grain size and non-metallic inclusion content of the material in the fully annealed state are also clearly defined.

China's mandatory standard for medical-grade stainless steel.

Austenitic 316L and 317L in accordance with the GB are the most commonly used medical grade stainless steels. Medical stainless steel is widely used to make a variety of artificial joints and fracture internal fixation devices, such as compression steel plates, goose skull screws, spinal nails, bone traction wires, artificial vertebral bodies, etc.

Medical-grade stainless steel applications.

With the vigorous development of China's food and medical device industry, the demand for stainless steel materials used in the food and medical industry is growing rapidly every year, and the revision of the new safer and stricter stainless steel standards will be an important part of the research and development of stainless steel materials in China.

For example, tooth extraction forceps, etc., are made of 420J2, 420J1, 3Cr13Mo, 4Cr13, 440A high-carbon stainless steel; There are also austenitic stainless steels, available in 304, 316lvm, 317l and so on.

Hello! Stainless steel is not a metal. Stainless steel belongs to alloys, which belong to metal materials, not to metals, because metals belong to elemental substances, and stainless steel belongs to mixtures.

Stainless steel refers to the steel that is resistant to corrosion by weak corrosive media such as air, steam, and water, and chemical corrosive media such as acid, alkali, and salt, also known as stainless acid-resistant steel. In practical application, the steel that is resistant to corrosion by weak corrosive media is often called stainless steel, and the steel that is resistant to corrosion by Bozhao chemical medium is called basal pico-rent acid resistant steel.

Summary. Hello, the main difference between food-grade stainless steel and ordinary stainless steel is the amount of harmful elements contained in it!

The content of harmful elements contained in the food grade must reach a range lower than the national standard, and the ordinary ones are generally mainly used for industry or civil.

Harmful elements mainly refer to sulfur, phosphorus, lead, 6-valent chromium, etc.

As for the treatment of the surface, it is not a means of differentiation, it is just a process, the internal and external surface finish is high, and the adhesion of the medium is rarely conducive to corrosion resistance. The higher the surface finish of the tube, the less the liquid medium is retained, which is conducive to flushing, especially in the pharmaceutical and food industries.

What is the difference between edible stainless steel, medical stainless steel and ordinary stainless steel.

Hello, I'm glad to answer for you, I'm sorting out the answer for you, typing takes time, please be patient for a while, and reply to you within five minutes.

Hello, the main difference between food-grade stainless steel and ordinary stainless steel is the amount of harmful elements contained in it! The content of harmful elements contained in the food grade must reach a range lower than the national standard, and the ordinary ones are generally mainly used for industry or civil. Harmful elements mainly refer to sulfur, phosphorus, lead, chromium 6, etc., as for the surface treatment, it is not a means of differentiation, it is just a process, the internal and external surface finish is high, and the medium adhesion is rarely conducive to corrosion resistance.

The higher the surface finish of the tube, the less the liquid medium is retained, which is conducive to flushing, especially in the pharmaceutical and food industries.

The stainless steel for medical treatment is mainly 304 austenitic stainless steel, and 304 18Cr-8Ni is a widely used steel with good corrosion resistance, heat resistance, low temperature strength and mechanical properties; Good hot workability such as stamping and bending, no heat treatment hardening phenomenon (non-magnetic, use temperature -196 800).

Summary. Because of its content characteristics, it is used to make medical equipment.

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Are stainless steel products medical devices?

No, he has a more detailed classification as medical stainless steel products.

There was a typo, it was medical stainless steel.

Is there a document. If it helps, you hope to get your 5 stars.

Illustrate these. There are no documents.

Summary. Medical stainless steel.

Medical stainless steel refers to the use of (18-10), i.e. +18% chromium + 10% nickel, to make it more durable and corrosion-resistant. Metal ions can still leak (close to the warning line) and are generally harmless but should be avoided by those with nickel allergies. [1] This stainless steel is called 18-10 stainless steel.

Due to its durable and safe properties, it is mainly used in the manufacture of medical devices and tableware.

Are stainless steel products medical devices?

Hello, glad to reply for you, is the answer takes a little time please understand thank you!

Medical stainless steelMedical stainless steel refers to the use of (18-10), i.e., +18% chromium + 10% nickel to make drain reeds to make them more durable and corrosion-resistant. Metal ions can still leak (close to the warning line) and are generally harmless but should be avoided by those with nickel allergies. [1] This stainless steel is called 18-10 stainless steel.

Due to its durable and safe properties, it is mainly used in the manufacture of medical equipment and tableware.

Some stainless steel products are medical devices, and some are not.