AISI 430 Ti grade

This is a nickel-free ferritic stainless steel of general application stabilized with titanium. It has a balanced chemical composition; high corrosion resistance, resistance to intergranular corrosion. Operable at temperatures up to 850 °C. It is classified as heat-resistant.

Chemical composition, in percent

The presence of aluminum and titanium, combined with a low percentage of carbon, result in high ductility and strength similar to nickel-containing grades (304). When heated and welded, this stabilizes the structure and protects the welded joints from intergranular corrosion. Active carbide formation only begins at t° over 1000 °C. In comparison with austenitic nickel-containing grades this steel is insensitive to intergranular corrosion at 500-800 °C and is also much less sensitive to chloride stress cracking.

Relevance

AISI 430 Ti corrosion resistance is similar to 12X18H10T, 08X17 steels. Unlike nickel-containing austenitic steels, chromium low-carbon ferritic steels are resistant in sulfur-containing media. That is why AISI 430 Ti wire meshes are used in oil, gas and petroleum products pumping systems, gas and petroleum refinery process units. Carbon content of 0,02-0,035% provides absence of tendency to intercrystalline corrosion and excellent weldability at high temperatures. This brand according to GOST 5632-72 by its performance characteristics is a substitute steel 12X18H10T, 12X18H9T. It is insensitive to intercrystalline corrosion cracking at t° 500-800°C and much less sensitive to chloride cracking.

The minimal coefficient of thermal expansion makes this steel advantageous for temperature fluctuations, e.g. in heat exchange systems. Having relatively low specific heat capacity, AISI 430 Ti is able to overheat and cool faster, thus avoiding possible inertial overheating.

Characteristics of AISI 430.

AISI 430 Ti steel is resistant to gaseous media generated by fuel combustion. Such media contain products of incomplete combustion (CO, NO, _H2 S, SO) and complete combustion (steam,_CO2, _NO2, _N2, _SO2, etc.). AISI 430 is used for recirculation systems, capture and neutralization of exhaust gases. Resistance to aggressive gas environments makes AISI 430 Ti steels are used in exhaust systems, furnace equipment production, exhaust systems and chimneys. Chromium steels have minimal coefficient of thermal expansion and increased thermal conductivity in comparison with austenitic nickel-containing grades. This predetermines their use in heat exchange systems such as cooling towers. The low coefficient of thermal expansion ensures reliable fitting and accelerated heat transfer during cooling of food tanks (with water, glycol or similar media). Chromium steel tubing and weldments have minimal dimensional variation with temperature fluctuations, reducing destructive fatigue stresses with temperature fluctuations, preventing unexpected leaks from hydraulic connections.

Food applications

Ferritic steels similar to AISI 430 Ti are popular in the wine industry. They are approved for use in contact with wine, must, cognac alcohol, as well as other products of the wine industry. It is allowed to use such steels (08Cr17T) for production of equipment used in meat and dairy industry at temperatures up to 140 °C.

AISI 430 Ti steel is in demand in the production of food processing equipment (hygienic processing of raw materials, equipment and products, separation, mixing, sorting, grinding, packing, heat treatment, transportation). All steels of this 400 series, including AISI 430 Ti can not only replace nickel grades, but also significantly exceed them in some properties, especially for food industry equipment.

Compliance with SNIP regulations

AISI 430 Ti fully complies with state standards SNIP and is very perspective for production of equipment for food industry: meat, fat and oil, bakery, alcohol, beer and soft drinks, confectionary, alcoholic beverages and spirits, etc.

Other spheres of application

- automotive industry;

- transport engineering;

- Civil construction and design;

- Production of kitchen utensils, table setting;

- manufacture of sinks, washing machine parts, drains, trays and drums for dishwashers

- fittings manufacturing.

The use of nickel-free economically alloyed stainless steels (430 analogues) in processing and food industries is regulated by the relevant regulations.

Influence of high temperature

AISI 430 Ti is not hardenable by hardening, scale resistance is maintained up to 850 °C. Can be used in aggressive environments without elevated temperatures.

Welding

Can be welded by all methods and does not lose corrosion resistance at weld spots if post-welding treatment: passivation, etching/cleaning. Arc welding in an inert gas atmosphere requires minimum energy consumption. Welded surface is located under the welding tool. Wire Sv-07Cr25Ni13, Sv-08Cr25Ni13BTu, 309L or AISI 430 Ti serves as filler material. After welding remove scale, process discoloration places with etching or brushes of stainless steel and passivate by cold 10-20% _HNO3 solution, followed by washing and drying.

Buy at the best price

Evek GmbH has a wide range of AISI 430 Ti in stock. Our representative offices are located. You can make a purchase without leaving your office, through the Company's website. The popularity of products of AISI 430 grade is explained by a variety of assortment and low cost. All products are of the highest quality. Technological completeness of each stage of production makes it possible for us to fulfill individual orders in case you are not satisfied with the basic execution of the product. We carry out high quality individual orders of non-standard parameters, the timing of their implementation is minimal. In case of bulk purchases we provide discounts.