ASTM A182 F304 Stainless Steel Blind Flanges

ASTM A182 F304 Blind Flanges are solid disk forged fittings used to permanently seal or terminate the end of a piping system, valve, or pressure vessel opening. Unlike other flange types, they have no bore or opening. They are essential for isolating sections of pipe for maintenance or for future expansion points. These flanges are manufactured from austenitic stainless steel (AISI 304), the material equivalent to the B8 bolting grade. The F304 grade ensures the flange can withstand the full pressure and temperature ratings of the piping system without failing, offering high reliability and excellent corrosion resistance against the process medium. Blind flanges must be robust to resist the total pressure load across the flange face. Zeron Fasteners manufactures these critical flanges in various pressure classes (e.g., 150#, 300#) and ensures the material and dimensional quality conform to ASME B16.5 standards for reliable and safe piping connections.

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ASTM A182 F304 Blind Flanges Manufacturer in India

ASTM A182 F304 Stainless Steel Blind Flanges Chemical Composition

Element Composition (%)
Carbon (C) 0.08 max
Manganese (Mn) 2.00 max
Phosphorus (P) 0.045 max
Sulfur (S) 0.030 max
Silicon (Si) 1.00 max
Chromium (Cr) 18.0 – 20.0
Nickel (Ni) 8.0 – 11.0

ASTM A182 F304 Stainless Steel Blind Flanges Mechanical Properties

Property Value
Tensile Strength 75 ksi (515 MPa) min
Yield Strength 30 ksi (205 MPa) min
Elongation 30% min
Hardness (Brinell) 192 HB max

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