Detailed Explanation of Properties and Chemical Composition of 304 Stainless Steel Plate

GB 304 stainless steel plate, also known as 18/8 stainless steel, is a high-quality stainless steel containing at least 18% chromium (Cr) and 8% nickel (Ni). In addition to Cr and Ni, it also includes trace amounts of carbon (C), silicon (Si), manganese (Mn), phosphorus (P), and sulfur (S). With a density of approximately 7.93 g/cm³, this steel offers excellent corrosion resistance and workability.

Chemical Composition

The primary components of GB 304 stainless steel plate are:

Chromium (Cr): 18–20%

Nickel (Ni): 8–10%

Other elements, such as carbon (C), silicon (Si), manganese (Mn), phosphorus (P), and sulfur (S), are present in relatively low amounts.

Mechanical Properties

Tensile strength (σb): 515–1035 MPa

Yield strength (σ0.2): ≥205 MPa

Elongation (A5): 240%

Hardness range:

≤201 HBW (Brinell hardness)

≤92 HRB (Rockwell B hardness)

≤210 HV (Vickers hardness)

Workability

GB 304 stainless steel plate exhibits excellent machinability, allowing for various processing methods, including:

Cold working & hot working

Welding

Shearing, bending, punching

Surface treatment

Due to its outstanding performance and superior workability, GB 304 stainless steel is widely used in industrial and everyday applications, making it a highly preferred material.

Key Notes on Translation:

"GB" is retained since it refers to the Chinese national standard, but "Chinese Standard (GB)" can be added in parentheses if needed.

Technical terms (e.g., tensile strength, yield strength) are kept in standard engineering English.

Clarity & conciseness—Avoided redundancy while ensuring all technical details are included.