Outokumpu 1.4509

牌号Outokumpu 1.4509
厂家Outokumpu
分类Steel
介绍Ferritic dual-stabilized stainless steel
Type X2CrTiNb18 stainless steel: EN 1.4509, UNS S43940, "AISI 441"
  • Stabilized both with titanium and niobium (columbium)

Applications
  • Tubular products for automotive industry and for process equipment like heat exchangers are the main application areas.
  • This material is used also in architectural applications, like elevators and door frames. Additionally, various structures in catering and household are among the application areas.
  • High chromium content makes this grade well suited for some selected applications for replacing standard austenitic grades.

Welding
  • Conventional welding methods and filler materials applied to austenitic 300-series can be used. Heat input in welding should been kept in a minimum level.
  • Generally welded structures show lower ductility compared to that of base material.

Forming and machining
  • Grade 1.4509 can be formed using typical forming processes like folding, bending, drawing, etc.
  • It has slightly higher proof strength than standard austenitic stainless steel grade 1.4301 / AISI 304 in combination with lower work hardening.
  • Due to the titanium stabilization, its r-value is higher compared to non-stabilized ferritic stainless steel.
  • These characteristics means excellent deep-drawability.

Corrosion resistance
  • Outokumpu produces grade 1.4509 typically with a chromium content of about 18 wt-%.
  • Titanium and niobium alloying reduces sensitivity for intergranular corrosion.
  • Relatively high chromium content improves resistance to crevice corrosion that is better when compared to some other ferritic stainless steels, like 1.4016.
  • Oxidation resistance is good up to 950°C.
  • In chloride containing environments pitting and crevice corrosion is possible depending on various parameters like chloride concentration, temperature, pH value, redox potential, crevice geometry and others.
  • The best material performance is reached usually with the help of adequate design, correct post-weld treatment and regular cleaning during use (if applicable).
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Outokumpu 产品展示 种类
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