In　view　of　the　problems　of　ordinary　rubber　seals,　such　as　high-　and　low-temperature　resistance,　easy　aging,　and　insufficient　load-bearing　performance,　O-type　metal　rubber　seals　with　large　ring-to-diameter　ratio　were　prepared　by　the　cold　stamping　method　using　stainless　steel　wire　as　raw　material.　The　effects　of　heat　treatment　and　porosity　on　the　compression　and　tensile　properties　of　test　samples　were　investigated.　Under　uniaxial　compression　testing,　it　was　found　that　the　test　sample　had　typical　hysteresis　characteristics,　and　the　loss　factor　and　energy　dissipation　of　the　sample　with　the　same　size　and　different　porosity　increased　with　the　decrease　of　porosity.　The　loss　factor　and　energy　dissipation　of　the　heat-treated　sample　were　lower　than　those　of　the　untreated　sample.　Thus,　the　smaller　the　porosity,　the　greater　the　change　of　loss　factor　and　energy　dissipation.　Under　uniaxial　tensile　testing,　obvious　stage　changes　were　found　during　the　tensile　process,　which　included　a　linear　elasticity　stage,　the　formation　and　development　stage　of　wire　breakage,　the　one-by-one　fracture　stage　of　wires,　and　the　complete　failure　stage　of　the　sample.　The　yield　strength,　ultimate　tensile　strength,　and　modulus　of　elasticity　of　four　samples　with　different　porosity　were　measured,　and　it　was　found　that　the　three　parameters　increased　with　the　decrease　of　porosity.　Moreover,　the　thermal　treatment　conductivity　increased　with　the　decrease　of　porosity.　The　aforementioned　three　parameters　were　generally　increased.　This　indicated　that　metal　rubber　materials　have　good　mechanical　properties　under　high-temperature　environments,　which　effectively　solves　the　problem　of　vulnerability　to　aging　and　failure　of　ordinary　rubbers　under　normal　working　conditions　and　has　strong　practical　engineering　significance.　©　2020　Yangyang　Yang　et　al.