ASTM A182 F904L Stainless Steel Flanges with Excellent Corrosion Resistance
ASTM A182 F904L Flanges are part of the American Society for Testing and Materials (ASTM) standard that defines the specifications for various types of flanges used in piping systems, particularly in industries dealing with high-temperature and high-pressure applications. The "F904L" refers to the material grade, which is a variant of the Duplex Stainless Steel family.
Key Characteristics of ASTM A182 F904L Flanges:
F904L is a duplex stainless steel, known for its high strength, excellent corrosion resistance, and good mechanical properties. It combines the benefits of austenitic and ferritic stainless steels.
ASTM A182 F904L Stainless Steel Flanges
| Stainless Steel 904L Flanges Type | Size | |
| ASTM A182 F904L Slip-On Flanges | ASTM A182 F904L Threaded Flanges | Sizes 1/8″ – 36″ Raised Face or Flat Face |
| ASTM A182 F904L Weld Neck Flanges | ASTM A182 F904L Socket Weld Flanges | |
| ASTM A182 F904L Ring Type Joint Flanges | ASTM A182 F904L Square Flanges | |
| ASTM A182 F904L Lap Joint Flanges | ASTM A182 F904L Plate Flanges | |
| ASTM A182 F904L Blind Flanges | ASTM A182 F904L Reducing Flanges | |
| ASTM A182 F904L Orifice Flanges | ASTM A182 F904L Forged Flanges | |
Stainless Steel Flange ASME SA182 F904L Equivalent Grades
| STANDARD | WERKSTOFF NR. | UNS | EN | AFNOR | JIS | BS | KS |
| SS 904L | 1.4539 | N08904 | X1NiCrMoCu25-20-5 | Z2 NCDU 25-20 | SUS 904L | 904S13 | STS 317J5L |
ASME SA182 F904L Flange Chemical Composition
| Grade | Ni | C | Mn | Si | P | S | Cr | Mo | Cu |
| SS 904L | 23.00 – 28.00 | 0.020 max | 2.00 max | 1.00 max | 0.040 max | 0.030 max | 19.00 – 23.00 | 4.00 – 5.00 max | 1.00 – 2.00 |
ASTM A182 SS 904L Flanges Mechanical Properties
| Yield Strength (0.2%Offset) | Melting Point | Tensile Strength | Density | Elongation |
| Psi – 32000 , MPa – 220 | 1350 °C (2460 °F) | Psi – 71000 , MPa – 490 | 7.95 g/cm3 | 35 % |
A wide variety of flange designs are available. They are available in various shapes and sizes. Some of the popular designs are as follows:
- Butt weld
- Socket weld
- Captive
- Split
- Square
- Round
- Rectangle etc.
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