Grade AISI 430
According to the standard ASTM A240, this chromium ferritic steel of general application is highly durable, resistant to soil and atmospheric moisture, due to the low carbon and high chromium content. Steel is processed by any means.
The percentage of
|Typically||0.020||0.7||less than 0.05||17||0.65||0.025|
|for ASTM A240||0.045 max.||1.0 max.||0.12 max||16.0−18.0||1.0 max.||0.03 max.|
The corrosion resistance of AISI 430 steel is similar 12X18H10T, 12H17. Unlike nickel austenitic steels, low carbon chromium ferritic steel resistant to sulfur-containing environments. In this connection, wire mesh grade AISI 430 are used in the oil pumping systems, gas, petroleum, gas processing plants and oil. AISI 430 steel has a low carbon concentration, which results in no need to stabilize titanium. The carbon content provides 0,02−0,035% at elevated temperatures, lack of propensity to intergranular corrosion resistance and excellent weldability. An intensive formation of carbide begins at t ° above 1000 ° C. AISI 430 in performance is improved 08H17T analogue.
From nickel austenitic grades steel AISI 430 distinguishes insensitivity to intergranular stress corrosion cracking in the range of 500−800 ° C, and a low sensitivity to chloride stress cracking. Minimum thermal expansion coefficient makes the use of the steel at low temperature differences, for example, heat transfer systems. With a relatively low specific heat, the steel AISI 430 is able to warm and cool quickly, making it possible to avoid possible overheating of inertia.
Comparative characteristics of steel grades AISI 430 and 12X18H10T.
|mark||The average thermal expansion coefficient (106 ° C-1).||Thermal conductivity at 20 ° C, (W / m • K)||Heat capacity of the specific (J / g • K) at 20 ° C||Magnetic quality||Resistance to chloride stress corrosion cracking, in MPa|
|AISI 430||10||25||0.44||Yes (ferromagnetic)||350|
Steel AISI 430 is resistant to the gas environments formed during the combustion of fuel. Such media contain products of incomplete combustion (CO, NO, H 2 S, SO) and the complete combustion (steam, CO 2, NO 2, N 2, SO 2 and so on. D.). AISI 430 is used for recirculation systems capture and neutralization of exhaust gases. Resistance to aggressive gas environments cause the use of steel AISI 430 in the manufacture of exhaust systems, heating equipment — exhaust systems, chimneys. Chromium steel having a minimum thermal expansion coefficient and enhanced thermal conductivity compared to austenitic nickel stamps. This predetermines their use in heat exchange systems such as cooling gradilni. Low thermal expansion coefficient of the Fitting fixation ensures reliable and rapid heat transfer during the cooling of food tanks (water, glycol, or similar fluids). Piping and welding pieces of chromium steels have minimal dimensional changes with temperature variation that reduces destructive fatigue loads at temperature drop preventing unintended leakage of the hydraulic connections.
|Status alloy AISI 430||Yield strength (MPa)||Tensile strength||Elongation at break|
|¼ hard||600||970 MPa||3%|
Use in food industry
Ferritic steel similar to AISI 430 popular in the wine industry. They are approved for use in contact with the wine, wort, cognac alcohol, as well as others. Winemaking products. Allowed the use of such steels (08H17T) for the production of equipment used in the meat-packing industry at temperatures up to 140 ° C.
AISI 430 steel demand in the manufacture of food processing equipment manufacturing (hygienic processing of raw materials, equipment and products, separation, mixing, sorting, grinding, packaging, heat treatment, transportation). All this became the 400 series, in Vol. H. Of AISI 430 can not only replace the nickel grade, but significantly exceed them in a number of properties, particularly for the food industry.
AISI 430 fully meet the state standards and SNIP is very promising in the production of equipment for processing and food industry: meat, fat, baking, alcohol, beer and soft drinks, confectionery, alcoholic beverage, and others.
— Transport machinery;
— Civil engineering and design;
— Manufacture of kitchen appliances, tableware;
— Manufacture of sinks, parts washing machines, sinks, trays and reels for dishwashers
— Production of internal and external accessories.
The use of nickel-free economically-alloyed stainless steels (430 analogs) in the processing and food industries regulated by the relevant regulations.
Ultimate strength at high temperatures:
|Temperature, ° C||600||500||400||300|
|Tensile strength, MPa||145||250||430||450|
Effect of high temperature
AISI 430 is not hardened by heat treatment, has good resistance to the formation of scale, maintaining performance properties useful to a temperature of 850 ° C. It is positioned as a heat-resistant, however, the actual operating temperature depends on the aggressiveness of the conditions of the environment.
|— Temperature data acquisition of the alloy [Castle]||— T|
|— Modulus of elasticity of the 1st kind, [MPa]||— E|
|— Coefficient of linear thermal expansion (at 20 ° C) [1 / deg]||-a|
|— The electrical resistance [ohm · m]||-R|
|— Specific weight [g / cm3]||-r|
|— Thermal conductivity [W / (m · deg)]||-l|
|— Specific heat capacity (at 20 ° C) [J / (kg · deg)]||-C|
Marking the mechanical properties:
|— The limit of proportionality (the yield strength for the residual strain) [MPa]||sT|
|— Short-term strength [MPa]||sre|
|— Reduction [%]||y|
|— Elongation at break [%]||d5|
|— Brinell hardness in [MPa]||HB|
|— Impact strength [kJ / m 2]||KCU|
|limited weldability||— Needs to preheating t ° 100−120 ° C with a final heat treatment|
|no limits||— No need for preliminary heating and final heat treatment|
|difficult to weld||— Needs to preheating t ° 200−300 ° C with a final heat treatment|
Welded by any methods without losing corrosion resistance welding in places subject to a post-weld treatment: a passivation etching / cleaning. Arc welding in an inert gas atmosphere requires minimal power consumption. Welded surface located below the welding tool. The wire-Savanoriu Str 07Kh25N13, 309L, St-08H25N13BTYU used as filler material. You can use electrodes or wire to the base of the brand AISI 439. To ensure corrosion resistance, remove scale, process annealing color space etching or brushes made of stainless steel and cold propassivirovat 10−20% HNO 3 solution. Next, you need a thorough washing and drying.
Buy at the best price
In stock «Elektrovek-steel» company offers a wide range of metal-roll brand AISI 430. Our offices are located in Russia and Ukraine. Making a purchase is possible, without leaving the office, through the Company’s website. The popularity of products of AISI 430 explains the diverse product mix and low cost. All products have the highest quality. Technological equipment for each production stage gives us an opportunity to carry out individual orders in the event that the basic performance of the product does not satisfy you. We make quality custom orders of non-standard options, the timing of their implementation are minimal. When wholesale purchases discounts.