Alloy steel flanges are essential components in various industrial applications, offering superior strength and durability compared to standard carbon steel flanges. Piyush Steel provides high-quality alloy flanges that meet rigorous standards, including ASTM A182, ASME SA182, and DIN 1.7335. Depending on the specific alloy and grade, these flanges are designated under the UNS numbers S23500, S27500, and S35500. They are available in various grades, such as Alloy Steel F5, F9, F11, F22, and F91, each offering unique properties suited to different industrial needs.
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The composition of our alloy steel flanges includes a mix of chromium, molybdenum, nickel, and manganese, which enhances their mechanical properties. For instance, Alloy Steel F22 typically contains 2.25% chromium and 1% molybdenum, providing excellent resistance to high-temperature environments and corrosive elements. These flanges are known for their robust mechanical properties, including a tensile strength ranging from 415 to 585 MPa and a yield strength of 205 to 310 MPa. It makes them ideal for power plants, chemical industries, and oil and gas pipelines, where durability and reliability are paramount.
Our alloy steel flanges come in various sizes and specifications to accommodate diverse application requirements. Standard sizes include diameters ranging from ½ inch to 48 inches, with pressure ratings from 150# to 2500#. Some of the most commonly used sizes are 2 inches, 4 inches, and 8 inches, catering to the needs of both small and large-scale projects. We also offer custom sizes and configurations, ensuring that our products meet the specific demands of each client.
The alloy steel flange price varies based on material grade, size, and market conditions. In Mumbai, prices typically range from INR 150 to 400 per kilogram, depending on the specifications. For international clients, the price range is approximately USD 2 to 5 per kilogram. These prices are subject to change, so we recommend contacting alloy steel flanges suppliers or alloy steel flanges manufacturers in India for the most current and accurate pricing information.
At Piyush Steel, we are committed to providing detailed product knowledge to our clients and buyers. Customers can make informed purchasing decisions by understanding the specifications, mechanical properties, and pricing of alloy steel flange. Our range of alloy steel flanges is designed to meet the highest industry standards, ensuring reliability and performance in demanding applications.
Specification : ASTM A182 / ASME SA182
Dimension Standard : ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
Standard : ASTM, ASME Flanges, ANSI Flanges, DIN Flanges, EN Flanges, BS Flanges etc
Size : 1 / 2″ to 36″
Pressure Ratings : 150#, 300#, 400#, 600#, 900#, 1500# & 2500#. PN6, PN10, PN16, PN25, PN40, PN64 etc
Flange Face Type : Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
| Grade | C | Mn | Si | P | S | Cr | Mo |
|---|---|---|---|---|---|---|---|
| F1 | 0.15 max | 0.3-0.6 | 0.5 | 0.03 | 0.03 | 4-6 | 0.44-0.65 |
| F5 | 0.15 max | 0.3-0.6 | 0.5-1.0 | 0.03 | 0.03 | 4-6 | 0.44-0.65 |
| F9 | 0.15 max | 0.3-0.6 | 0.5-1.0 | 0.03 | 0.03 | 8-10 | 0.9-1.1 |
| F11 | 0.05-0.15 | 0.3-0.6 | 0.5-1.0 | 0.03 | 0.03 | 1.0-1.5 | 0.44-0.65 |
| F12 | 0.15 max | 0.3-0.6 | 0.5 | 0.03 | 0.03 | 4-6 | 0.44-0.65 |
| F22 | 0.15 max | 0.3-0.6 | 0.5 | 0.03 | 0.03 | 4-6 | 0.44-0.65 |
| F91 | 0.15 max | 0.3-0.6 | 0.5-1.0 | 0.03 | 0.03 | 8-10 | 0.9-1.1 |
| Grade | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
|---|---|---|---|
| F1 | 275 | 485 | 20 % |
| F5 | 275 | 485 | 20 % |
| F9 | 380 | 585 | 20 % |
| F11 | 205 | 415 | 20 % |
| F12 | 275 | 485 | 20 % |
| F22 | 205 | 415 | 20 % |
| F91 | 380 | 585 | 20 % |
| Material Group | Common Name | Type | UNS | Forging Spec. | Casting Spec. Equivalent | DIN | DIN W. No | Application |
|---|---|---|---|---|---|---|---|---|
| Low AS | Moly Steel | C-1/2Mo | K12822 | A182-F1 cl2 | A217-WC1 | 15M03 | 1.5415 | Up to 470ºC* (875ºF) |
| AS Chrome Moly | 1.1/4Cr-1/2Mo | K11572 | A182-F11 cl2 | A217-WC6 | 13CRM044 | 1.7335 | Up to 593ºC (1100ºF) | |
| 2.1/4Cr-1Mo | K21590 | A182-F22 cl3 | A217-WC9 | 10CRM0910 | 1.7380 | Up to 593ºC (1100ºF), HP steam | ||
| 5Cr-1/2Mo | K41545 | A182-F5/F5a | A217-C5 | 12CRMO195 | 1.7362 | High temp refinery service | ||
| 9Cr-1Mo | K90941 | A182-F9 | A217-C12 | X 12 CrMo 9 1 | 1.7386 | High temp erosive refinery service | ||
| 9Cr-1Mo-V | A182-F91 | A217-C12A | X 10 CrMoVNb 9 1 | 1.4903 | High pressure steam |
The full identification of the flanges should be continuously marked down its whole length, including :

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Alloy Steel Flanges Price List
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