Stainless Steel 446 Flanges are designed to meet one of the toughest tasks in industrial piping - extreme heat. Grade 446 (UNS S44600 / DIN 1.4762) is a ferritic stainless steel flange that contains 23-27% chromium, which makes it the most resistant to oxidation of any grade in the 400-series. It can also operate at continuous service temperatures up to 1149 C (2100 F), and is therefore the product of choice in furnaces, burners, kilns, boilers, and thermal processing systems where the 304 or 316 flanges just can not work. SS 446 also has sulfurous gas attack and scaling resistance in high-heat conditions, unlike austenitic grades. Amardeep Steel is a supplier of ASTM A182 F446 flanges in all forms and pressure categories - 1/2 to 48 NB, fully certified with the mill.
Specification of Stainless Steel 446 Flanges
| Specification | Details |
|---|---|
| Material Standards | ASTM A182, ASME SA182 |
| Designation | A182, SA182 |
| Dimension Standards | ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS 4504, BS 10, EN-1092, DIN, etc. |
| System Standards | ANSI, ASME, BS, DIN, EN Flanges |
| Size Range | 1/2″ (15 NB) to 48″ (1200 NB) |
| Pressure Classes | Class 150, 300, 400, 600, 900, 1500, 2500 |
| Pressure Ratings (PN) | PN6, PN10, PN16, PN25, PN40, PN64, etc. |
| Flange Face Types | Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
| Forming Process | Forged (ASTM A182 / ASME SA182 F446) |
| Grade Designations | UNS S44600 / DIN 1.4762 / WERKSTOFF 1.4762 |
| Compliance | NACE MR0175 / ISO 15156 |
| Inspection | EN 10204 3.1, PMI, Hardness Test, Hydrostatic Test, TPI available |
| Packing | Wooden corrugated boxes, bubble wrap; marked with Grade, Heat No., Size, PO No. |
Chemical Composition of SS 446 Flanges
| Grade | C | Mn | Si | P | S | Cr | Ni | Fe |
|---|---|---|---|---|---|---|---|---|
| SS 446 | 0.20 max | 1.50 max | 1.00 max | 0.040 max | 0.030 max | 23.00 – 27.00 | 0.75 max | ~73.00 |
ASTM A182 Stainless Steel 446 Flanges
| Density | Melting Point | Tensile Strength | Yield Strength (0.2% Offset) | Elongation |
|---|---|---|---|---|
| 7.5 g/cm³ | 1510 °C (2750 °F) | 75,000 Psi (485 MPa) | 40,000 Psi (275 MPa) | 20% |
Types of Stainless Steel 446 Flanges
SS 446 WELD NECK FLANGES SERIES A OR B
Flange Facing Type & Finish
.webp)
SS 446 Ring Type Joint Flanges (RTJ)
Lip type Flanges
SS 446 Spectacle Blind
SS 446 Groove & Tongue Flanges
SS 446 Screwed Flanges
446 Stainless Steel Flanges
SS 446 Spades Ring Spacers
SS 446 High Hub Blind Flange
SS 446 Forged Flanges
SS 446 Puddle Flanges
SS 446 Expander Flanges
SS 446 Flat Flanges
SS 446 Loose Flanges
SS 446 Weldo _ Nipo Flanges
SS 446 Square Flanges
SS 446 Plate Flanges
SS 446 ASME Flanges
SS 446 Reducing Flanges
SS 446 Orifice Flanges
 Flanges.webp)
SS 446 Slip On (SO) Flanges
 Flanges.webp)
SS 446 Weld Neck (WN) Flanges
SS 446 Lap joint flanges
 Flanges.webp)
SS 446 Blind (BL) Flanges
SS 446 Threaded Flanges
SS 446 Socket Welding Flange
SS 446 Long Weld Neck Flanges
SUS 446 Flanges Size Chart
| Nom. Pipe Size | OD (D) | Thk (T) | RF (R) | Hub (x) | No. / Dia. of Holes | Bolt Circle | WN (L) | Bore (B) | SO/SW (Y) |
|---|---|---|---|---|---|---|---|---|---|
| 1/2″ | 3.50 | 0.44 | 1.38 | 1.19 | 4 - 0.62 | 2.38 | 1.88 | 0.62 | 0.62 |
| 3/4″ | 3.88 | 0.50 | 1.69 | 1.50 | 4 - 0.62 | 2.75 | 2.06 | 0.82 | 0.62 |
| 1″ | 4.25 | 0.56 | 2.00 | 1.94 | 4 - 0.62 | 3.12 | 2.19 | 1.05 | 0.69 |
| 1-1/4″ | 4.62 | 0.62 | 2.50 | 2.31 | 4 - 0.62 | 3.50 | 2.25 | 1.38 | 0.81 |
| 1-1/2″ | 5.00 | 0.68 | 2.88 | 2.56 | 4 - 0.62 | 3.88 | 2.44 | 1.61 | 0.88 |
| 2″ | 6.00 | 0.75 | 3.62 | 3.06 | 4 - 0.75 | 4.75 | 2.50 | 2.07 | 1.00 |
| 2-1/2″ | 7.00 | 0.88 | 4.12 | 3.56 | 4 - 0.75 | 5.50 | 2.75 | 2.47 | 1.12 |
| 3″ | 7.50 | 0.94 | 5.00 | 4.25 | 4 - 0.75 | 6.00 | 2.75 | 3.07 | 1.19 |
| 3-1/2″ | 8.50 | 0.94 | 5.50 | 4.81 | 8 - 0.75 | 7.00 | 2.81 | 3.55 | 1.25 |
| 4″ | 9.00 | 0.94 | 6.19 | 5.31 | 8 - 0.75 | 7.50 | 3.00 | 4.03 | 1.31 |
| 5″ | 10.00 | 0.94 | 7.31 | 6.44 | 8 - 0.88 | 8.50 | 3.50 | 5.05 | 1.44 |
| 6″ | 11.00 | 1.00 | 8.50 | 7.56 | 8 - 0.88 | 9.50 | 3.50 | 6.07 | 1.56 |
| 8″ | 13.50 | 1.12 | 10.62 | 9.69 | 8 - 0.88 | 11.75 | 4.00 | 7.98 | 1.75 |
| 10″ | 16.00 | 1.19 | 12.75 | 12.00 | 12 - 1.00 | 14.25 | 4.00 | 10.02 | 1.94 |
| 12″ | 19.00 | 1.25 | 15.00 | 14.38 | 12 - 1.00 | 17.00 | 4.50 | 12.00 | 2.19 |
| 14″ | 21.00 | 1.38 | 16.25 | 15.75 | 12 - 1.12 | 18.75 | 5.00 | 13.25 | 2.25 |
| 16″ | 23.50 | 1.44 | 18.50 | 18.00 | 16 - 1.12 | 21.25 | 5.00 | 15.25 | 2.50 |
| 18″ | 25.00 | 1.56 | 21.00 | 19.88 | 16 - 1.25 | 22.75 | 5.50 | 17.25 | 2.69 |
| 20″ | 27.50 | 1.69 | 23.00 | 22.00 | 20 - 1.25 | 25.00 | 5.69 | 19.25 | 2.88 |
| 22″ | 29.50 | 1.81 | 25.25 | 24.25 | 20 - 1.38 | 27.25 | 5.88 | 21.25 | 3.13 |
| 24″ | 32.00 | 1.88 | 27.25 | 26.12 | 20 - 1.38 | 29.50 | 6.00 | 23.25 | 3.25 |
ASTM A182 F446 Blind Flanges Weight Chart
| Flange Standard | Class/Rating | Flange Dia. (mm) | Bolt Circle (mm) | Bolt Qty | Bolt Size | Hole Dia. (mm) |
|---|---|---|---|---|---|---|
| AS 4087 | PN14 | 95 | 67 | 4 | M12 | 14 |
| AS 2129 | Table C | 95 | 67 | 4 | 1/2″ | 14 |
| Table D | 95 | 67 | 4 | 1/2″ | 14 | |
| Table E | 95 | 67 | 4 | 1/2″ | 14 | |
| Table F | 95 | 67 | 4 | 1/2″ | 14 | |
| Table H | 114 | 83 | 4 | 5/8″ | 17 | |
| Table J | 114 | 83 | 4 | 5/8″ | 17 | |
| ANSI B16.5 | Class 150 | 89 | 60 | 4 | 1/2″ | 16 |
| Class 300 | 95 | 67 | 4 | 1/2″ | 16 | |
| Class 600 | 95 | 67 | 4 | 1/2″ | 16 | |
| Class 900 | 121 | 83 | 4 | 3/4″ | 22 | |
| Class 1500 | 121 | 83 | 4 | 3/4″ | 22 | |
| ISO 7005 (DIN) | PN6 | 80 | 55 | 4 | M10 | 11 |
| PN10 | 95 | 65 | 4 | M12 | 14 | |
| PN16 | 95 | 65 | 4 | M12 | 14 | |
| PN20 | 90 | 60.5 | 4 | M14 | 16 | |
| PN25 | 95 | 65 | 4 | M12 | 14 | |
| PN40 | 95 | 65 | 4 | M12 | 14 |
Pressure Rating Chart of SS 446 Flanges
| Temp (°C) | Class 75 | Class 150 | Class 300 | Class 400 | Class 600 | Class 900 |
|---|---|---|---|---|---|---|
| -29 to 38 | 10.0 | 20.0 | 51.7 | 68.9 | 103.4 | 155.1 |
| 50 | 9.8 | 19.5 | 51.7 | 68.9 | 103.4 | 155.1 |
| 100 | 8.8 | 17.7 | 50.7 | 67.5 | 101.3 | 152.0 |
| 150 | 7.9 | 15.8 | 45.9 | 61.2 | 91.9 | 137.8 |
| 200 | 6.9 | 13.8 | 42.7 | 56.9 | 85.3 | 128.0 |
| 250 | 6.0 | 12.1 | 40.5 | 53.9 | 80.9 | 121.4 |
| 300 | 5.1 | 10.2 | 38.9 | 51.8 | 77.7 | 116.6 |
Application Usage of Stainless Steel 446 Flanges
- Petrochemical Industries
- Power Generation Industries
- Food Processing Industries
- Oil & Gas Industries
- Sugar Industries
Price List of Stainless Steel 446 Flanges
| Product Type | Price Range (FOB) | Price (INR) |
|---|---|---|
| Stainless Steel Forged Flanges | $2.05 - $10.06 / Piece | ₹170 - ₹835 |
| Stainless Steel Blind Flanges | $2.05 - $10.06 / Piece | ₹170 - ₹835 |
| Stainless Steel Slip-On Flange | $2.05 - $10.06 / Piece | ₹170 - ₹835 |
| Stainless Steel Socketweld Flanges | $2.05 - $10.06 / Piece | ₹170 - ₹835 |
| Stainless Steel Long Weld Neck Flanges | $2.05 - $10.06 / Piece | ₹170 - ₹835 |
Related Products
- Stainless Steel 304 Flanges
- Stainless Steel 304L Flanges
- Stainless Steel 304H Flanges
- Stainless Steel 310 Flanges
- Stainless Steel 310S Flanges
- Stainless Steel 316 Flanges
- Stainless Steel 316L Flanges
- Stainless Steel 316H Flanges
- Stainless Steel 317 Flanges
- Stainless Steel 317L Flanges
- Stainless Steel 321 Flanges
- Stainless Steel 321H Flanges
- Stainless Steel 347 Flanges
- Stainless Steel 347H Flanges
- Stainless Steel 446 Flanges
Frequently Asked Questions
What are Stainless Steel 446 flanges?
Stainless Steel 446 flanges are high-temperature pipe fittings made from ferritic stainless steel with high chromium content, designed to connect piping systems in extreme heat and oxidizing environments.
What is ASTM A182 F446 flange specification?
ASTM A182 F446 is a standard that covers forged Stainless Steel 446 flanges for high-temperature and high-pressure applications, ensuring strength, durability, and oxidation resistance.
What is UNS S44600 material?
UNS S44600 is the material designation for Stainless Steel 446, a ferritic stainless steel known for its excellent oxidation resistance and performance in high-temperature environments.
What are the properties of SS 446 flanges?
SS 446 flanges offer high oxidation resistance, excellent performance in sulfurous atmospheres, resistance to scaling, and the ability to withstand very high temperatures without deformation.
What is the temperature range of Stainless Steel 446?
Stainless Steel 446 can handle continuous service temperatures up to 1149°C (2100°F) and intermittent temperatures up to 1038°C (1900°F), making it ideal for extreme heat applications.
What is 475°C embrittlement in SS 446?
Prolonged exposure of SS 446 in the 400–500°C (752–932°F) range causes 475°C embrittlement, a precipitation reaction that reduces toughness and ductility. SS 446 is not recommended for continuous service at this temperature range. It is specified for service above 815°C (1500°F) or at ambient temperatures, not for the intermediate range.
