ASTM A182 F304 Stainless Steel Flanges
ASTM A182 F304 Stainless Steel Flanges are the most commonly used flanges from all the other austenitic
stainless steel grades. The content of chromium in the Stainless Steel 304L Flanges ranges between 15 % and 20 %, while the alloy used to make these
flanges contains nickel between the range of 2% to 10.5%. In the SS 304L Blind Flange metals such as chromium and nickel are the main non-iron or
non-ferrous constituents. As compared to carbon steel, SS 304L Slip On Flange is less electrically as well as thermally conductive. Further,
these SS 304 Blind Flange tend to essentially have a non-magnetic nature. Since the A182 Gr F304L SORF has a higher resistance to corrosion in comparison to regular
steel grades, it is relatively easy to form into various shapes
stainless steel 304 is the most widely used grades across a variety
of sectors.
In the term ASTM A182 F304L Flanges, the Specification is ASTM A182, which in turn is a Standard meant
for either Forged or Rolled Alloy as well as Stainless Steel Pipe
Flanges, Forged Fittings, Valves and Parts. The specification for
the ASTM A182, covers the mentioned components as they have been
designed keeping in mind their use in High-Temperature
applications. Apart from having Stainless Steel 304 Flanges produced from regular 304 grade metal, its derivatives i.e. 304H
& 304L too can be used in their manufacture. The difference
between all the three metals is that the content of carbon varies
across each grave.
ASTM A182 F304 Material Specification
ASTM A182 F304L Flange Chemical Composition
| Grade | Si | C | Mn | Cr | Ni | N | S | P |
| SS 304 | 0.75 max | 0.03 max | 2 max | 18 – 20 | 8 – 12 | 0.10 Max | 0.030 max | 0.045 max |
| SS 304L | 1.00 max | 0.035 max | 2.0 max | 18-20 | 8-13 | - | 0.03 max | 0.045 max |
ASTM A182 F304L Flanges Mechanical Properties
| Grade | SS 304 Flanges Tensile Strength | SS 304 Flanges Yield Strength (0.2%Offset) | SS 304 Flanges Elongation | SS 304 Flanges Density | SS 304 Flanges Melting Point |
| SS 304 Flanges | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 40% | 8.0 g/cm3 | 1400 °C (2550 °F) |
| SS 304L Flanges | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35% | 8.0 g/cm3 | 1400 °C (2550 °F) |
Equivalent Grades for Stainless Steel 304l Flanges
| STANDARD | DIN | WERKSTOFF NR. | AFNOR | BS | EN | JIS | GOST | UNS |
| SS 304 | 1.4301 | 1.4301 | Z7CN18‐09 | 304S31 | SUS 304 | SUS 304 | 08Х18Н10 | S30400 |
| SS 304L | 1.4306 / 1.4307 | 1.4306 / 1.4307 | Z3CN18‐10 | 3304S11 | X2CrNi18-9 / X2CrNi19-11 | SUS 304L | 03Х18Н11 | S30403 |
ASTM A182 F304 Stainless Steel Flanges Physical Properties
Typical physical properties for annealed grade 304 stainless steels
are given in table 3.
Table 3. Physical properties of 304 grade stainless steel in the annealed
condition
| Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (m/m/0C) | Thermal Conductivity(W/m.K) | Specific Heat 0-1000C(J/kg.K) | Electrical Resistivity (n.m) |
|---|
| 0-1000C | 0-3150C | 0-5380C | at 1000C | at 5000C |
|---|
| 304/L/H | 8000 | 193 | 17.2 | 17.8 | 18.4 | 16.2 | 21.5 | 500 | 720 |
|---|
ASTM A182 F304 Stainless Steel Flanges Types
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