High nitrogen BIODUR108 stainless steel is a better mechanical and physical properties of medical implantation steel
Compared with other medical steel, for medical implantation design and development of nickel-free stainless steel BIODUR108 shows higher strength, better corrosion resistance, better biocompatibility. As shown in Table 1, it has a nitrogen content of >0.90%, compared to 0.10 - 0.50% for other medical steels; its nickel content is no higher than 0.05%, compared to 9 to 15% for other steels; and BIODUR108 has a manganese content of 21 - 24% manganese, compared to 2 - 6% manganese for other steels. In a high-nitrogen, high-strength steel such as BIODUR108, a higher manganese content is required to maintain austenitic structural stability.
BIODUR108 demonstrates higher strength than any other nickel-containing medical steel, in either solution annealed or cold-formed form, when tested according to ASTM standards. Its corrosion resistance performance is comparable to that of BioDur 734? and BioDur 22Cr-13Ni-5Mn, and significantly higher than the widely used BioDur 316LS alloy.This paper evaluates BioDur 108, 734, 22Cr-13Ni-5, and 316LS in terms of strength, corrosion resistance, and biocompatibility.