AISI 201: This is the grade of stainless steel, defined by the American Iron and Steel Institute (AISI).
Type: It is an austenitic stainless steel, meaning it has a crystalline structure that is non-magnetic and formable.
Key Characteristic: The primary advantage of 201 is its lower cost compared to the standard 304 grade. This is because it contains less expensive nickel.
Cold Rolled (CR): This refers to the manufacturing process.
The steel is rolled at room temperature, which hardens the material and requires it to be annealed (heat-treated) to restore ductility.
Advantages of Cold Rolling:
Superior Surface Finish: Cold rolled sheet has a much smoother, more uniform, and often brighter surface than hot rolled sheet. It is ideal for applications where appearance matters.
Tighter Dimensional Tolerances: Thickness, width, and flatness are more precise and consistent.
Increased Strength and Hardness: The cold working process increases the material's strength.
Better Formability: While ha

310: This is the base grade, also known as "310" or "310S" (the 'S' denotes a lower carbon version for better weldability). Grade 310 is an austenitic stainless steel.
Si2: This is the crucial modifier. It indicates a high silicon content, typically around 2.0% - 2.5% (compared to ~0.75% max in standard 310S).
2. Key Characteristics & Properties
The addition of silicon dramatically enhances one primary property。
310Si2 is a niche material used in the most demanding heating sections of industrial furnaces and equipment.
Industrial Furnace Components:
Radiant Tubes: For radiant tube heaters in furnaces.
Heat Retorts & Muffles: Enclosures that protect work pieces from combustion gases.
Roller Hearth & Conveyor Systems: Parts that carry material through hot furnaces.
Oxygen lances and other furnace internals.
Heat Treatment Baskets & Trays: For holding parts during carburizing, annealing, or brazing processes.
Burner Nozzles & Components: In high-temperature burners.
Thermowells: Sheaths t

316: This is the grade of stainless steel. Grade 316 is an austenitic grade, often referred to as "Marine-Grade" or "Surgical-Stainless."
Key Characteristics: Its defining feature is the addition of Molybdenum (2-3%). This dramatically increases its resistance to corrosion, particularly pitting and crevice corrosion from chlorides (like saltwater) and acids. It is superior to 304 in harsh environments. It is also non-magnetic in its annealed state and offers excellent toughness and formability.
Hot Rolled: This is the most critical and unusual part of this description for a polished sheet.
Process: The steel is rolled into a sheet at a high temperature (typically above 1700°F / 925°C).

430: This is the grade of the stainless steel. Grade 430 is a ferritic stainless steel.
Key Characteristics:
Good Corrosion Resistance: Performs well in mild atmospheres and against organic chemicals. However, it is not as corrosion-resistant as Austenitic grades (like 304), especially in chloride environments (e.g., near saltwater).
Advantages of Cold Rolling:
Smoother Surface Finish: Provides a much smoother and more consistent surface than hot-rolled steel.

SUS 304 is the Japanese JIS standard designation for the most common austenitic stainless steel, equivalent to AISI 304 or 18/8 stainless (18% Chromium, 8% Nickel). When it is cold rolled, it means the final shaping process at the mill was done at or near room temperature, resulting in a superior surface finish, tighter dimensional tolerances, and increased strength through work-hardening.

304L: This is a low-carbon variation of the classic 18/8 (18% Chromium, 8% Nickel) austenitic stainless steel. The "L" stands for "Low Carbon" (max 0.03% vs. 0.08% in standard 304). This reduction in carbon minimizes the risk of sensitization (carbide precipitation at grain boundaries) during welding, which can lead to intergranular corrosion in harsh environments.
Cold Rolled (CR): This refers to the manufacturing process. The steel is rolled at room temperature, below its recrystallization temperature. This process hardens the steel, improves its surface finish, and allows for tighter dimensional tolerances compared to hot-rolled (HR) sheet.