Outokumpu 1.4372
Type 17Cr-5Ni-7Mn stainless steel: EN 1.4372, AISI 201
- A low nickel variation to standard austenitic stainless steel grade 1.4301.
Applications
- Applications like cookware, washing machine baskets and hose clamps are generally used. In contact with food there are national regulations and in some of them chromium content Min. 17 % and nickel content Min. 4 % are required for cutlery materials.
- Due to its high strength, corrosion resistance and competitive costs, steel grade is suited for the transportation industry.
- Material is used also in architectural applications, like elevators, windows, doors and lamp posts.
Welding
- Conventional welding methods and filler materials applied to 300-series can be used. Proper shield against possible Mn-oxide fumes is recommended.
- Sensitive to intergranular corrosion in the weld heat affected zone when material thickness exceeds 6 mm.
- Cleaning of the weld seam is important for corrosion resistance. Pickling is recommended.
Fabrication
- Formability is good, but the forces needed and the elastic return are bigger compared to carbon steels and grade 1.4301 / AISI 304.
- Steel grade 1.4372 suits for demanding forming operations as well as bending, and drawing due to its high elongation to fracture.
- Work hardening is pronounced. Sensitivity to delayed cracking after demanding forming processes may be observed, e.g. when deep drawing ratio is close to 2,0 and residual tensile stresses are present.
- Typically Mn-alloyed grades have a slightly lower surface reflectivity compared to the CrNi-grade 1.4301. This can lead for the need of increased material removal in further polishing and brushing processes.
Corrosion resistance
- Outokumpu produces grade 1.4372 typically with a chromium content of about 17 wt-% and a nitrogen content of 0,20 wt-% giving the material a corrosion resistance close to grade 1.4301 / AISI 304. Repassivation enhanced by nickel is lower than that of grade 1.4301.
- In chloride containing solutions pitting and crevice corrosion is possible depending on various parameters like chloride concentration, temperature, pH value, redox potential, crevice geometry and others.
- Oxidation resistance is good and comparable to steel grade 1.4310 / AISI 301 up to 840°C.
- The best material performance is reached usually with the help of adequate design, correct post-weld treatment and regular cleaning during use (if applicable).
Propriedades gerais
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Technical Datasheet (English)
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