430 Stainless Steel is a low-carbon plain chromium ferritic stainless steel. The steel has good corrosion resistance in mildly corrosive environments and good resistance to oxidation at elevated temperature. In the annealed condition the steel is ductile, does not harden excessively during cold work and can be formed using a large variety of roll forming or mild stretch-bending operations, as well as the more common drawing and bending processes. 430 Stainless Steel has limited weldability and should not be used in the as welded condition for dynamic or impact loaded structures. Being a ferritic material, 430 is liable to brittle fracture at sub-zero temperatures, and cannot be used in cryogenic applications. As the steel does not contain nickel or molybdenum, it is cheaper than any of the 300 series steel. 430 stainless steel is the most popular of all the straight chrome stainless steel. Its principal use is for decorative purposes. Because of its excellent heat and corrosion resistant properties, its ductility and because it…

ASTM A268 409 409L 1.4512 stainless steel is an alloy designed principally for the automotive exhaust industry, although it has been used successfully in other industrial applications. It combines good elevated temperaturecorrosion resistance with medium strength, good formability and overall cost. 409L stainless steel is highly resistant to high temperatures, achievable engine and exhaust systems, and reduces the thickness of the exhaust system to reduce exhaust emissions. Low cost, good flexibility, high yield, easy replacement, and environmentally friendly new products. 409 Stainless Steel is a titanium stabilised ferritic stainless steel. Although regarded as a general-purpose chromium stainless steel the primary application for Grade 409 is automotive exhaust systems. Its applications are those where appearance is a secondary consideration to mechanical properties and corrosion resistance and where some weldability is required. Type 409 is a ferritic stainless steel that has a good combination of heat resistance and corrosion resistance. Its titanium stabilized low nickel content provides for an economical metal to corrosion resistance and oxidation resistance . More highly…

ASTM A268 ASME SA268 S40500 405 Stainless Steel 1.4002 is a 12% chromium steel, designed to be used in the as welded condition.  Unlike other grades in the 12% chromium category, 405 is not susceptible to extensive hardening through air cooling from high temperature. Commonly used for annealing boxes, steam nozzles, quenching racks, partitions and other fabrications that cannot be annealed after welded. Soft and ductile, 405 can be easily machined using most standard practices. Experienced machinists comment that 405 machines similarly to 4130 alloy steel. 405 can be easily spun, drawn and formed using common forming procedures. 405 Stainless Steel can be welded using shielded fusion and resistance techniques. Oxyacetylene welding is not recommended. Use 405 Cb electrodes that contain columbium rather than aluminum to control hardening. Post weld annealing will maximize ductility. Soak at 1500-1600 F(817-871 C) and then quickly increase to 1900-2050 F(1038-1121 C). Do not remain at this temperature as the result will be excessive grain growth. Do not work below 1500 F(816C). After forging,…

Austenitisch | Martensitisch | Ferritisch | Duplex | Super Duplex | Superaustenitisch | Superferritisch | PrecipitatiehardenFerritisch roestvast stalen buizen zijn in principe ferriet bij alle temperaturen. Dit wordt bereikt door een laag gehalte aan austenitische vormende elementen, voornamelijk nikkel, en een hoog gehalte aan ferrietvormende elementen, voornamelijk chroom. Ferritische types, zoals 4003 en 4016, worden vooral gebruikt voor huishoudelijk keukengerei, cateringapparatuur en andere toepassingen waarbij de corrosieomstandigheden niet bijzonder veeleisend zijn. Staal met een hoog chroomgehalte, zoals 4762 met 24% chroom, wordt gebruikt bij hoge temperaturen waar hun weerstand tegen zwavelhoudende rookgassen een voordeel is. Er moet echter altijd rekening worden gehouden met het risico op verbrossing bij 475 °C en precipitatie van de brosse sigmafase in staal met hoog chroomgehalte. Ferritisch roestvast staal, zoals 4521 met extreem lage koolstof- en stikstofgehaltes, wordt het meest gebruikt als er een risico is op spanningscorrosiescheuren. Ferritisch roestvast staal heeft een iets hogere vloeigrens (Rp 0,2) dan austenitische staalsoorten, maar ze hebben minder rek bij breuk. Een andere eigenschap die ferritisch staal onderscheidt van austenitisch materiaal is dat ferritisch...