ASTM A182 F304

ASTM A182 F304 Stainless Steel Flange

ASTM A182 F304 stainless steel flange is a highly versatile and widely used component in industrial applications, particularly in industries requiring excellent corrosion resistance, heat resistance, and mechanical strength. This flange is manufactured from stainless steel grade 304, which is known for its exceptional properties and reliability.
Stainless Steel Flanges
Stainless Steel Flanges

Specification:

  • Grade: ASTM A182 F304 Stainless Steel
  • Standard: ASTM A182/A182M
  • Type: Austenitic Stainless Steel
  • Form: Flanges (Slip-on Flange, Weld Neck Flange, Blind Flange, Socket Weld Flange, Threaded Flange, Lap Joint Flange, Plate Flange)
  • Size: Available in various dimensions (½”, ¾”, 1”, 1 ¼”, 1 ½”, 2”, 2 ½”, 3”, 4”, 5”, 6”, 8”, 10”, 12”, 14”, 16”, 18”, 20”, 24”, 26”, 28”, 30”, 32”, 34”, 36”, 38”, 40”, 42”, 44”, 46”, 48”)
  • Pressure Class: 150, 300, 600, 800, 900, 1500, 2500
  • End Types: Flanged, Threaded, Welded

A182 F304 Equivalent

StandardEquivalent Grade
ASTM A182F304
UNSS30400
EN/DIN1.4301 / X5CrNi18-10
ISOX5CrNi18-9
JISSUS304
BS304S31
GB0Cr18Ni9

Type of Flanges

stainless steel threaded flange
A182 F304 Threaded Flanges
stainless steel socket weld flange
A182 F304 Socket-Weld Flanges
Stainless Steel Slip on Flange
A182 F304 Slip On Flange
ss lap joint flange
A182 F304 Lap Joint Flanges
Stainless Steel weld neck flange
A182 F304 Weld Neck Flanges
Stainless Steel Blind Flange
A182 F304 Blind Flange

ASTM A182 F304 Material Properties:

Chemical Composition:

ElementComposition (%)
Carbon (C)≤0.08
Manganese (Mn)≤2.00
Silicon (Si)≤1.00
Phosphorus (P)≤0.045
Sulfur (S)≤0.030
Chromium (Cr)18.0-20.0
Nickel (Ni)8.0-10.5
Nitrogen (N)≤0.10
Iron (Fe)Balance

Mechanical Properties:

PropertyValue
Tensile Strength≥450 MPa
Yield Strength≥205 MPa
Elongation≥40%
Hardness (Brinell)≥180 HB

Physical Properties:

PropertyValue
Density8.0 g/cm³
Melting Point1400-1450°C
Thermal Conductivity16.2 W/m-K
Specific Heat Capacity500 J/kg-K
Electrical Resistivity0.072 Ω-mm²/m

Chemical Formula:

The approximate chemical formula for stainless steel grade 304 is Fe-Cr18-Ni10.

Grade Specification Comparison Table:

PropertyF304F304LF316
Carbon Content (%)≤0.08≤0.03≤0.08
Corrosion ResistanceHighHighHigher
WeldabilityGoodExcellentGood

Corrosion Resistance:

ASTM A182 F304 flanges exhibit excellent resistance to corrosion in a wide range of environments, including:

  • Atmospheric conditions
  • Mildly oxidizing and reducing environments
  • Acids such as nitric acid and acetic acid

Heat Resistance:

The grade demonstrates good oxidation resistance in intermittent service up to 870°C and in continuous service up to 925°C. However, it is not recommended for environments with severe carburizing or reducing conditions.

Heat Treatment:

  • Solution Annealing: Heat to 1010-1120°C and cool rapidly.
  • Hardening: This grade cannot be hardened by heat treatment; only cold working can increase hardness.

Welding:

ASTM A182 F304 flanges have excellent weldability and are compatible with various welding methods such as TIG, MIG, and resistance welding. Post-weld annealing is generally not required unless the application is particularly corrosive.

Fabrication:

This grade is easy to fabricate using standard machining and forming techniques. Its high ductility and toughness make it suitable for processes like bending, cutting, and drilling.

Applications:

ASTM A182 F304 stainless steel flanges are widely used in various industries, including:

  • Oil & Gas: For pipelines and pressure vessels
  • Chemical Processing: Corrosion-resistant fittings and valves
  • Power Plants: High-temperature applications
  • Food & Beverage: Hygienic and safe handling equipment
  • Pharmaceutical: Sterile environments
  • Marine: Resistance to saltwater environments
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