Will meet the YYT_0294-1-2005 standard medical surgical instruments metal materials, stainless steel, what is the steel? Is the steel Oh!
500 series - heat-resistant chrome alloy steel.
600 Series - Martensite Precipitation Hardening Stainless Steel.
Model 630 - the most commonly used precipitation hardening stainless steel model, usually also called 17-4; 17% Cr, 4% Ni. , Chrome 18-20.
Model 416 - Added sulfur improves the processability of the material.
Model 420 - "cutting edge" martensitic steel, similar to Brinell high chrome steel this first stainless steel. Also used for surgical instruments, can be done very bright.
Model 430 - ferritic stainless steel, decorative, for example for car accessories. Good formability, but poor in temperature and corrosion resistance.
Model 440 - high-strength cutting tool steel, slightly higher carbon, after the appropriate heat treatment can get a higher yield strength, hardness can reach 58HRC, are the hardest stainless steel column. The most common application example is the "shaving blade". There are three commonly used models: 440A, 440B, 440C, in addition to 440F (easy to type).
Stainless steel has the following types:
Model 301 - good ductility, for molding products. It can also be hardened by mechanical processing. Good weldability. Abrasion resistance and fatigue strength is better than 304 stainless steel.
Model 302 - Corrosion resistance with 304, due to the relatively high carbon content and thus better strength.
Model 303- By adding a small amount of sulfur, phosphorus makes it easier to cut than 304.
Model 304- Universal model; ie 18/8 stainless steel. GB grade 0Cr18Ni9.
Model 309 - has better temperature resistance than 304.
Model 316 - Following the 304, the second most widely used steel, mainly for the food industry and surgical equipment, add molybdenum elements to obtain a special anti-corrosion structure. Because it is better than the 304 resistance to chloride corrosion and therefore also for the "marine steel" to use. SS316 is usually used for nuclear fuel recovery devices. 18/10 grade stainless steel is also usually in line with this application level. [1]
Model 321 - In addition to the addition of titanium to reduce the risk of material weld corrosion other than the performance of similar 304.
400 series - ferrite and martensitic stainless steel
Model 408 - Good heat resistance, weak corrosion resistance, 11% Cr, 8% Ni.
Model 409 - the cheapest model (Anglo-American), usually used as a car exhaust pipe, is a ferritic stainless steel (chrome steel).
Model 410 - martensite (high strength chrome steel), good wear resistance, poor corrosion resistance.
