304 stainless steel is a standard grade of stainless steel that is widely used in various industries. It is part of the "austenitic" stainless steel family, which is characterized by its high corrosion resistance and excellent formability. Here are some key features and standards associated with 304 stainless steel:

Chemical Composition:

Carbon (C): 0.08% maximum

Chromium (Cr): 18-20%

Nickel (Ni): 8-10.5%

Manganese (Mn): 2% maximum

Silicon (Si): 1% maximum

Phosphorus (P): 0.045% maximum

Sulfur (S): 0.03% maximum

Corrosion Resistance:

304 stainless steel exhibits excellent corrosion resistance, particularly in atmospheric environments and many corrosive media.

It is resistant to corrosion from most oxidizing acids and is often used in applications where exposure to chemicals and corrosive substances is a concern.

Physical Properties:

Density: 8.03 g/cm³

Melting Point: 1400-1450°C (2550-2640°F)

Electrical Resistivity: 0.73 μΩ·m (at 20°C, 68°F)

Thermal Conductivity: 16.2 W/m·K (at 100°C, 212°F)

Modulus of Elasticity: 193 GPa (28 x 10^6 psi)

Standards and Specifications:

The primary international standard for 304 stainless steel is ASTM A240/A240M, which specifies the requirements for chromium and chromium-nickel stainless steel plate, sheet, and strip for pressure vessels and for general applications.

Other standards that encompass 304 stainless steel include ASTM A276 (standard specification for stainless steel bars and shapes), ASTM A312/A312M (standard specification for seamless, welded, and heavily cold-worked austenitic stainless steel pipes), and ASTM A554 (standard specification for welded stainless steel mechanical tubing).

Various national and international standards organizations, such as ANSI, DIN, and JIS, also have their own specifications for 304 stainless steel.

Applications:

304 stainless steel finds extensive use in a wide range of applications, including:

Kitchen appliances and utensils

Food processing equipment

Architectural and decorative applications

Automotive components

Chemical processing equipment

Pharmaceuticals and medical devices

Heat exchangers and condensers

Piping systems

Storage tanks and pressure vessels

It's worth noting that specific requirements for 304 stainless steel may vary depending on the intended application or industry. Consulting the relevant standards and specifications, as well as professional guidance, is recommended to ensure compliance and optimal performance.