Stella sterilis saepe in steela martensitica, steela ferritica, steela austenitica, steela austenitica ferritica (duplex), steela sterilis ferritica (duplex), et fertilis sterilis induratus secundum statum organizationis eorum. In addition, it can be divided in chromium stainless steel, chromium nickel stainless steel, and chromium manganese nitrogen stainless steel according to their composition. Est etiam steel stainless specializatus pro vasis pressionis, GB24511_2009_Steel Steel Plates et Strips for Pressure Equipment.

Ferritic stainless steel

15% ad 30% chromium continet. Its corrosion resistance, toughness, and weldability increase with the increase of chromium content, and its resistance to chloride stress corrosion is better than other types of stainless steel, including Crl7, Cr17Mo2Ti, Cr25, Cr25Mo3Ti, Cr28, etc. Ferritic stainless steel has good corrosion resistance and oxidation resistance due to its high chromium content, but its mechanical and process properties are poor. It is mostly used in acid resistant structures with low stress and as an oxidation resistant steel. This type of steel can resist corrosion from atmospheric, nitric acid, and saltwater solutions, and has good high-temperature oxidation resistance and low thermal expansion coefficient. It is used in nitric acid and food factory equipment, and can also be used to make parts that work at high temperature, such as gas turbine parts.

Austenitic stainless steel

Plus quam 18% chromium continet, circa 8% nickel, et parva multa molybdenum, titanium, nitrogen et ceteris elementorum. Good comprehensive performance and can resist corrosion from various media. The commonly used grades of austenitic stainless steel include 1Cr18Ni9, 0Cr19Ni9, etc. Wc oculi 0Cr19Ni9 minus est; 0.08%, nota est “ in grado steeli; 0”. Haec typus fertilis magnum summam Ni et Cr continet, quæ ferrum facit in statu austenitis in cubiculo temperatura. This type of steel has good plasticity, toughness, weldability, corrosion resistance, and is non-magnetic or weakly magnetic. It has good corrosion resistance in both oxidizing and reducing media and is used to make acid resistant equipment, such as corrosion-resistant containers and equipment linings, conveying pipelines, nitric acid resistant equipment parts, etc. In addition, it can also be used as the main material for stainless steel clock accessories. Austenitic stainless steel generally treated with solid solution, which involves heating the steel to 1050-1150 °C and then cooling it with water or air to obtain a single phase austenitic structure.

Austenitic ferritic duplex steel stainless

It combines the advantages of austenic and ferritic stainless steel and has superplasticity. Stella sterilis cum austenitis et ferritis structuris singulis quasi dimidium cogitant. In case of low carbon content, the chromium (Cr) content is between 18% and 28%, and the nickel (Ni) content is between 3% and 10%. Certe steelae etiam sunt elementos allogantes sicut Mo, Cu, Si, Nb, Ti, N, etc. This type of steel combines the characteristics of austenitic and ferritic stainless steel. Compared with ferritic stainless steel, it has higher plasticity and difficulty, no room temperature brittleness, significantly improved intergranular corrosion resistance and welding performance. At the same time, it maintains the 475 °C brittleness and high thermal conductivity of ferritic stainless steel, and has characteristics such as superplasticity. Comparatus est austenitico steelo stainless, superior fortitudo habet et significantem meliora resistentia intergranulae corrosionis et corrosionis stressis chloridis. Dual phase stainless steel excellent resistance to pitting corrosion and is also a nickel saving stainless steel.

Precipitation hardening stainless steel

The matrix is austenitic or martensitic structure, and common grades of precipitation hardened stainless steel include 04Cr13Ni8Mo2Al, etc. Stella stabilis, qui indurabilis est (fortitudo) per precipitationem indurabilis (etiam known as age hardening) treatment.

Martensis steel stainless

Alta fortitudo sed pauper plasticita et prosperabilia. The commonly used grades of martensitic stainless steel include 1Cr13, 3Cr13, etc. Due to their high carbon content, they have high strength, hardness, and wear resistance, but slightly lower corrosion resistance. They are used for some parts with high mechanical performance requirements but general corrosion resistance requirements, such as springs, turbine blades, hydraulic compressor valves, etc. Hoc typum steelae post extinguendum et temperatum trationem utilitur. Annealing postquam forgetur et pulserat est.

Stainless steel plates and strips for pressure equipment

Special stainless steel for pressure vessels have clear requirements for classification and code, size, shape and allowable deviation, technical requirements, test methods, inspection rules, packaging, labeling, and product quality certificates. The commonly used grades include 06Cr19Ni10 and 022Cr17Ni12Mo2, with numerical codes such as S30408 and S31603. Mainly used for hygiene grade equipment such as food machinery and pharmaceutical machinery.