Stainless Steel

We produce ASTM/ASME Grade 304, Grade 304L,304h, 316, 316L, 316H, 316TI, 321, 321H, 309S, 309H, 310S, 310H, 410S, 2205, 904L, 2507, 254, gh3030, 625, 253MA, S30815, 317L, Type 317, 316lN, 8020, 800, 800H, C276, S32304 and others special requirement stainless steel grade.

When a steel is exposed to underwater or moist environments, marine grade metals could also be necessary to forestall the fabric from failing beneath the conditions. To be considered a marine grade, the fabric must be in a position to withstand corrosive results that are common in a water environment. To achieve this, particular alloying elements are added to those grades in order to defend against corrosion. Marine grades could be present in a lot of the metal varieties, which embrace aluminium, stainless steel, brass, bronze, copper and carbon steel.

For the Type 316 alloy the solution anneal is completed by heating within the 1900 to 2150° F (1040 to 1175° C) temperature vary followed by air cooling or a water quench, depending on part thickness. Cooling should be sufficiently rapid by way of the ° F ( ° C) range to avoid reprecipitation of chromium carbides and provide optimum corrosion resistance. In every case, the metal ought to be cooled from the annealing temperature to black heat in less than three minutes.

Austenitic stainless-steel is the biggest family of stainless steels, making up about two-thirds of all stainless-steel production (see manufacturing figures under). They possess an austenitic microstructure, which is a face-centered cubic crystal construction. Thus, austenitic stainless steels are not hardenable by heat therapy since they possess the same microstructure at all temperatures. In addition to wonderful corrosion resistance and strength properties, Types 316 and 316L alloys also present the excellent fabricability and formability that are typical of the austenitic stainless steels.

 

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• In every case, the steel must be cooled from the annealing temperature to black heat in lower than three minutes.
• For the Type 316 alloy the answer anneal is accomplished by heating within the 1900 to 2150° F (1040 to 1175° C) temperature range adopted by air cooling or a water quench, depending on section thickness.
• Cooling ought to be sufficiently rapid by way of the ° F ( ° C) vary to keep away from reprecipitation of chromium carbides and supply optimum corrosion resistance.
• These austenitic stainless steels are provided in the mill annealed condition prepared for use.
• Heat remedy may be necessary during or after fabrication to remove the effects of cold forming or to dissolve precipitated chromium carbides resulting from thermal exposures.

Stock Thickness: 0.1-200.0mm
Production thickness: 0.5.0-200mm
Width: 600-3900mm
Length: 1000-12000mm
Grade:
200 series: 201,202
300 series: 301,304,304L,304H,309,309S,310S,316L,316Ti,321,321H,330
400 series: 409,409l,410,420J1,420J2,430,436,439,440A/B/C
Duplex: 329,2205,2507,904L,2304
Surface: No.1,1D,2D,2B,NO.4/4K/hairline,satin,6k,BA,mirror/8K

Ferritic stainless steels possess a ferrite microstructure like carbon steel, which is a body-centered cubic crystal structure, and comprise between 10.5% and 27% chromium with very little or no nickel. This microstructure is present at all temperatures because of the chromium addition, so they don’t seem to be hardenable by warmth remedy.

Type 304, the most common grade of chrome steel with 18% chromium, is immune to approximately 870 °C (1,600 °F). Other gases, corresponding to sulfur dioxide, hydrogen sulfide, carbon monoxide, chlorine, also attack stainless steel. Resistance to other gases depends on the type of gas, the temperature, and the alloying content material of the stainless-steel. Type 316 is significantly more resistant than any of the opposite chromium-nickel varieties to solutions of sulfuric acid.

They cannot be strengthened by chilly work to the same degree as austenitic stainless steels. This provides resistance to intergranular attack with any thickness within the as-welded condition or with quick durations of exposure within the ° F ( ° C) temperature range. Where vessels require stress relieving remedy, brief remedies falling within these limits can be employed without affecting the normal wonderful corrosion resistance of the metallic. Accelerated cooling from higher temperatures for the “L” grade isn’t needed when very heavy or cumbersome part have been annealed. Type 304 chrome steel is considered to resist pitting and crevice corrosion in waters containing up to about a hundred ppm chloride.

Localized Corrosion

These austenitic stainless steels are provided in the mill annealed condition ready for use. Heat remedy could also be necessary during or after fabrication to remove the effects of chilly forming or to dissolve precipitated chromium carbides resulting from thermal exposures.

We have thousands tons stock of stainless steel sheet and coil with various size and grade,mainly include austenitic stainless steel, martens stainless steel (including precipitation hardened stainless steel sheet & coil), ferritic stainless steel, and duplex stainless steel.

Characteristics of Stainless Steel Sheet and Plate:
High corrosion resistance
High strength
High toughness and impact resistance
Temperature resistance
High workability, including machining, stamping, fabricating and welding
Smooth surface finish that can be easily clean