Global Exporter of ASTM A182 Gr. F1, F5, F9, F11, F22, F91 Alloy Steel Flanges & Forged Fittings – ASME/ANSI B16.5 & B16.11 Standards
We are a globally recognized supplier and manufacturer of ASTM A182 F1, F5, F9, F11, F22, and F91 alloy steel forged fittings and flanges, with over three decades of expertise serving the power generation, petrochemical, oil & gas, and heavy‑process industries. Operating from ISO 9001:2015‑certified facilities, we combine advanced forging, machining, and inspection capabilities to deliver precision‑engineered components on time and to exacting specifications. From rapid‑turnaround maintenance orders to large‑scale EPC projects, our commitment to quality and customer support has made us the trusted partner for critical piping systems worldwide.
Our comprehensive product portfolio includes forged flanges—weld‑neck, slip‑on, blind, socket‑weld, threaded, lap‑joint, and ring‑type joint—and an extensive range of forged fittings such as 90° and 45° long‑ and short‑radius elbows, equal and reducing tees, crosses, couplings, unions, bushings, and caps. For branch connections, we supply weldolets, sockolets, and threadolets. All materials strictly conform to the chemical and mechanical requirements of ASTM A182, and dimensions comply with ASME/ANSI B16.5, B16.47, B16.9, and B16.11. Each grade is heat‑treated—normalized, tempered, or quenched & tempered—to optimize strength, creep resistance, and toughness within its intended service envelope.
Components are stocked in nominal sizes from ½” NB to 24” NB, with ANSI/ASME pressure classes ranging from 150# through 2,500#, covering low‑pressure steam lines through ultra‑supercritical boiler headers. We maintain extensive inventory of all six grades—F1, F5, F9, F11, F22, and F91—in both seamless and forged‑from‑billet constructions. Every item ships with EN 10204 3.1 or 3.2 mill test certificates and full ISO 9001:2015 accreditation. Third‑party inspection by bodies such as BV, Lloyd’s, or SGS is available on request, ensuring complete traceability and peace of mind.
ASTM A182 F1 and F5 alloys excel in moderate‑temperature applications up to 400 °C, offering excellent weldability and impact toughness. Grades F9, F11, and F22, with elevated chromium content, are engineered for superheater and reheater service between 400 °C and 550 °C, delivering enhanced creep strength and oxidation resistance. The premium F91 alloy incorporates vanadium and niobium for ultra‑supercritical boiler service up to 650 °C, providing superior creep‑rupture life and thermal fatigue resistance. All production batches undergo 100% Positive Material Identification (PMI), ultrasonic and radiographic testing, hydrostatic pressure testing, and rigorous dimensional inspections in our ISO‑certified laboratories—guaranteeing the highest reliability for your most demanding projects.
ISO Certified Supplier of Alloy Steel Forged Fittings & Flanges – ANSI/ASME B16.5, B16.47, B16.11 Socket Weld & Threaded Types: Elbows, Tees, Couplings, Unions, Plugs – ASME B16.11, BS 3799 – Sizes ½” to 48” – WNRF, SORF, BLRF, SWRF, RTJ, Lap Joint & Threaded Flanges – Class 150 to 2500
Technical Index
Industrial Alloy Steel ASTM A182 F1 Specifications
| Material Grade | ASTM A182 F1, F5, F9, F11, F22, F91 (Forged Fittings, Flanges) |
|---|---|
| Available Product Types | Flanges (WNRF, SORF, Blind, Socket Weld, Threaded, RTJ) & Forged Fittings (Elbows, Tees, Reducers, Couplings, Unions, Bushings, Caps) |
| Flanges Size Range | ½” NB to 24” NB |
| Flange Pressure Class | 150#, 300#, 600#, 900#, 1500#, 2500# |
| Forged Fittings Size | ½” NB to 4” NB (Socket Weld & Threaded) |
| Fitting Pressure Class | Class 2000#, 3000#, 6000# |
| Standard Specifications | ASTM A182 / ASME SA182 |
| Manufacturing Standards | ASME B16.5 (Flanges), ASME B16.11 (Forged Fittings), MSS SP‑83, MSS SP‑44 (Flanges), MSS SP‑95 |
| Flange Types | Weld Neck, Slip‑On, Socket Weld, Threaded, Blind, Ring‑Type Joint |
| Forged Fitting Types | 90° Elbow (LR/SR), 45° Elbow, Equal Tee, Reducing Tee, Cross, Full/Half Coupling, Union, Bushing, Cap |
| Heat Treatment | Normalized, Tempered, Quenched & Tempered (per grade) |
| Mechanical Properties |
Tensile Strength: 380–620 MPa (varies by grade) Yield Strength: 205–415 MPa (varies by grade) Elongation: ≥20% |
| Testing & Certifications | ISO 9001:2015, EN 10204 3.1/3.2 MTC, PMI, UT, Radiography, Hydrostatic Test, NACE MR0175 |
| Surface Finish | Pickled, Passivated, Sand Blasted, Black Coated |
| Manufacturing Capabilities | Hot Forging, CNC Machining, Beveling, Induction Heat Treatment, Custom Fabrication |
| Raw Material Sources | India, Japan, South Korea, USA, Germany, Italy |
| Export Destinations | USA, Canada, UAE, Saudi Arabia, Qatar, Oman, Egypt, South Africa, Nigeria, Australia, Europe |
Industrial ASTM A182 Alloy Steel Standards
| ANSI/ASME B16.47 Flanges | ANSI/ASME B16.36 Flanges | ANSI/ASME B16.5 Flanges | Pr. EN1902-1 Flanges |
| DIN Flanges | JIS Flanges | BS 4504 Flanges | BS 10 Flanges |
| MSS SP-44 Flanges | JIS B2220 Flanges | KS B1503 Flanges | UNI Flanges |
| SABS/SANS 1123 Flanges | AS 2129, AS 4087 Flanges | ISO 9624, ISO 7005-1 Flanges | AWWA Flanges Standard |
| GOST Standard Flanges | API Flanges | AS/ANZ 4331.1 Flanges | Series A Flange |
| Series B Flange | SAE J518 Flanges | GB Flange | Norwegian Standard Flanges |
| ASME B16.11 – Forged Steel Fittings, Socket-Welding and Threaded | BS 3799 – Screwed and Socket-Welding for the Petroleum Industry | MSS SP-79 – Socket-Welding Reducer Inserts | MSS SP-83 – Class 3000 Steel Pipe Unions, Socket-Welding and Threaded |
| MSS SP-95 – Swage(d) Nipples and Bull Plugs | MSS SP-97 – Integrally Reinforced Forged Branch Outlet Fittings | DIN 2986 – Threaded Fittings | DIN 2999 – Pipe Threads for Fittings (British Standard Pipe Threads) |
| ISO 49 – Malleable Iron Fittings, Threaded | ISO 7/1 – Pipe Threads Where Pressure-tight Joints Are Made on the Threads | EN 10241 – Steel Threaded Pipe Fittings | JIS B2316 – Japanese standard for forged pipe fittings. |
ASTM A182 Alloy Steel International Standards
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
|---|---|---|---|---|---|---|---|
| ASTM A182 F1 | 1.5415 | K12822 | STPA 20 | 3604 | 12Х1МФ | 15CD2.05 | 16Mo3 |
| ASTM A182 F5 | 1.7362 | K41545 | STPA 25 | 622-490 | 15Х5М | 15CD5.05 | 13CrMo44 |
| ASTM A182 F9 | 1.7380 | K90941 | STPA 23 | 622-490 | 15Х9М | 15CD9.05 | 10CrMo9-10 |
| ASTM A182 F11 | 1.7335 | K11597 | STPA 22 | 621-550 | 12Х1МФ | 15CD2.05 | 13CrMo4-5 |
| ASTM A182 F22 | 1.7383 | K21590 | STPA 24 | 621-570 | 12Х2М | 15CD2.25 | 10CrMo9-10 |
| ASTM A182 F91 | 1.4903 | K90901 | STPA 28 | 620-590 | — | Z15CDNbV12.1 | X10CrMoVNb9-1 |
ASTM A182 Alloy Steel Chemical Composition
| Grade | C (%) | Mn (%) | Si (%) | Cr (%) | Mo (%) | P (%) | S (%) | Other Elements |
|---|---|---|---|---|---|---|---|---|
| ASTM A182 F1 | 0.10–0.20 | 0.30–0.80 | 0.10–0.50 | 0.50–0.80 | 0.44–0.65 | ≤0.035 | ≤0.040 | — |
| ASTM A182 F5 | ≤0.15 | 0.30–0.60 | 0.50–1.00 | 4.00–6.00 | 0.45–0.65 | ≤0.030 | ≤0.030 | — |
| ASTM A182 F9 | ≤0.15 | 0.30–0.60 | 0.50–1.00 | 8.00–10.00 | 0.90–1.10 | ≤0.030 | ≤0.030 | — |
| ASTM A182 F11 | 0.05–0.15 | 0.30–0.60 | 0.50–1.00 | 1.00–1.50 | 0.44–0.65 | ≤0.030 | ≤0.030 | — |
| ASTM A182 F22 | 0.05–0.15 | 0.30–0.60 | 0.50–1.00 | 1.90–2.60 | 0.87–1.13 | ≤0.030 | ≤0.030 | — |
| ASTM A182 F91 | 0.08–0.12 | 0.30–0.60 | 0.20–0.50 | 8.00–9.50 | 0.85–1.05 | ≤0.020 | ≤0.010 | V: 0.18–0.25, Nb: 0.06–0.10, N: 0.03–0.07 |
Alloy Steel Flanges Mechanical Properties
| Grade | Tensile Strength (MPa) | Yield Strength 0.2% Proof (MPa) | Elongation (%) | Hardness (HBW) | Impact Energy (J) |
|---|---|---|---|---|---|
| ASTM A182 F1 | 380 min | 205 min | 22 min | ≤197 | 27 (typical) |
| ASTM A182 F5 | 415 min | 205 min | 20 min | ≤207 | 27 (typical) |
| ASTM A182 F9 | 585 min | 275 min | 20 min | ≤217 | 27 (typical) |
| ASTM A182 F11 | 415 min | 205 min | 20 min | ≤197 | 27 (typical) |
| ASTM A182 F22 | 415–585 | 205–415 | 18–22 | ≤235 | 27 (typical) |
| ASTM A182 F91 | 585–760 | 415 min | 20 min | ≤250 | ≥41 (Charpy V-notch @ RT) |
ASTM A182 Alloy Steel Types
ASTM A182 Chrome Moly Industries & Applications
ASTM A182 Alloy Steel Flange Weight Chart
| Size | OD | WT | SR 90 Deg Elbows Centre – Face A | Weight | LR 90 Deg Elbows Centre – Face A | Weight | SR 45 Deg Elbows Centre – Face B | Weight | ||
|---|---|---|---|---|---|---|---|---|---|---|
| mm | inch. | mm | mm | SCH | mm | kg | mm | kg | mm | kg |
| 500 | 20″ | 508 | 9.52 | STD | 508 | 93.5 | 762 | 140 | 318 | 85 |
| 12.7 | X.S | 508 | 124 | 762 | 186 | 318 | 112.5 | |||
| 450 | 18″ | 457 | 9.52 | STD | 457 | 75.6 | 686 | 113 | 286 | 56.5 |
| 12.7 | X.S | 457 | 100 | 686 | 150 | 286 | 75 | |||
| 400 | 16″ | 406.4 | 9.52 | STD | 406 | 59.5 | 610 | 89.3 | 254 | 45 |
| 12.7 | X.S | 406 | 78.7 | 610 | 118 | 254 | 59 | |||
| 350 | 14″ | 355.6 | 9.52 | STD | 356 | 45.4 | 533 | 68.1 | 222 | 34.1 |
| 12.7 | X.S | 356 | 60 | 533 | 90 | 222 | 45 | |||
| 300 | 12″ | 323.9 | 9.52 | STD | 305 | 35.4 | 457 | 53.1 | 190 | 26.6 |
| 12.7 | X.S | 305 | 46.7 | 457 | 70 | 190 | 35 | |||
| 250 | 10″ | 273.9 | 9.27 | STD | 254 | 24.1 | 381 | 36.1 | 159 | 18.1 |
| 12.7 | X.S | 254 | 32.5 | 381 | 48.8 | 159 | 24.4 | |||
| 200 | 8″ | 219.1 | 8.18 | STD | 203 | 13.6 | 305 | 20.4 | 127 | 10.2 |
| 12.7 | X.S | 203 | 20.9 | 305 | 30.9 | 127 | 15.5 | |||
| 150 | 6″ | 168.3 | 7.11 | STD | 152.4 | 6.8 | 229 | 10.1 | 95.2 | 5.1 |
| 10.97 | X.S | 152.4 | 10.2 | 229 | 15.3 | 95.2 | 7.7 | |||
| 125 | 5″ | 141.3 | 6.65 | STD | 127 | 4.8 | 190 | 6.8 | 79.4 | 3.4 |
| 9.5 | X.S | 127 | 6.5 | 190 | 10 | 79.4 | 5 | |||
| 100 | 4″ | 114.3 | 62 | STD | 101.6 | 2.8 | 152.4 | 4.2 | 63.5 | 2.1 |
| 8.56 | X.S | 101.6 | 3.9 | 152.4 | 5.7 | 63.5 | 2.9 | |||
| 80 | 3″ | 88.9 | 5.49 | STD | 76.2 | 1.45 | 114.3 | 2.18 | 50.8 | 1.1 |
| 7.62 | X.S | 76.2 | 1.95 | 114.3 | 2.86 | 50.8 | 1.45 | |||
| 65 | 21/2″ | 73 | 5.16 | STD | 63.5 | 0.95 | 95.2 | 1.46 | 44.4 | 0.73 |
| 71 | X.S | 63.5 | 1.27 | 95.2 | 1.82 | 44.4 | 0.91 | |||
| 50 | 2″ | 60.3 | 3.91 | STD | 50.8 | 0.5 | 76.2 | 0.72 | 34.9 | 0.36 |
| 5.54 | X.S | 50.8 | 0.68 | 76.2 | 1 | 34.9 | 0.5 | |||
| 40 | 11/2″ | 48.3 | 3.68 | STD | 38.1 | 0.26 | 57.1 | 0.4 | 28.6 | 0.2 |
| 58 | X.S | 38.1 | 0.35 | 57.1 | 0.5 | 28.6 | 0.25 | |||
| 32 | 11/4″ | 42.2 | 3.56 | STD | 31.75 | 0.18 | 47.6 | 0.28 | 25.4 | 0.14 |
| 4.85 | X.S | 31.75 | 0.24 | 47.6 | 0.39 | 25.4 | 0.2 | |||
| 25 | 1″ | 33.4 | 3.38 | STD | 25.4 | 0.11 | 38.1 | 0.15 | 22.2 | 09 |
| 4.55 | X.S | 25.4 | 0.14 | 38.1 | 0.19 | 22.2 | 0.11 | |||
| 20 | 3/4″ | 26.7 | 2.87 | STD | – | – | 28.6 | 08 | 11.1 | 04 |
| 3.91 | X.S | – | – | 28.6 | 0.11 | 11.1 | 05 | |||
| 15 | 1/2″ | 21.3 | 2.78 | STD | – | – | 38.1 | 08 | 15.9 | 04 |
| 3.73 | X.S | – | – | 38.1 | 0.10 | 15.9 | 05 | |||
ASTM A182 Alloy Steel Forged Fittings Dimensions
| Size | OD | WT | SR 90 Deg Elbows Centre – Face A | Weight | LR 90 Deg Elbows Centre – Face A | Weight | SR 45 Deg Elbows Centre – Face B | Weight | ||
|---|---|---|---|---|---|---|---|---|---|---|
| mm | inch. | mm | mm | SCH | mm | kg | mm | kg | mm | kg |
| 500 | 20″ | 508 | 9.52 | STD | 508 | 93.5 | 762 | 140 | 318 | 85 |
| 12.7 | X.S | 508 | 124 | 762 | 186 | 318 | 112.5 | |||
| 450 | 18″ | 457 | 9.52 | STD | 457 | 75.6 | 686 | 113 | 286 | 56.5 |
| 12.7 | X.S | 457 | 100 | 686 | 150 | 286 | 75 | |||
| 400 | 16″ | 406.4 | 9.52 | STD | 406 | 59.5 | 610 | 89.3 | 254 | 45 |
| 12.7 | X.S | 406 | 78.7 | 610 | 118 | 254 | 59 | |||
| 350 | 14″ | 355.6 | 9.52 | STD | 356 | 45.4 | 533 | 68.1 | 222 | 34.1 |
| 12.7 | X.S | 356 | 60 | 533 | 90 | 222 | 45 | |||
| 300 | 12″ | 323.9 | 9.52 | STD | 305 | 35.4 | 457 | 53.1 | 190 | 26.6 |
| 12.7 | X.S | 305 | 46.7 | 457 | 70 | 190 | 35 | |||
| 250 | 10″ | 273.9 | 9.27 | STD | 254 | 24.1 | 381 | 36.1 | 159 | 18.1 |
| 12.7 | X.S | 254 | 32.5 | 381 | 48.8 | 159 | 24.4 | |||
| 200 | 8″ | 219.1 | 8.18 | STD | 203 | 13.6 | 305 | 20.4 | 127 | 10.2 |
| 12.7 | X.S | 203 | 20.9 | 305 | 30.9 | 127 | 15.5 | |||
| 150 | 6″ | 168.3 | 7.11 | STD | 152.4 | 6.8 | 229 | 10.1 | 95.2 | 5.1 |
| 10.97 | X.S | 152.4 | 10.2 | 229 | 15.3 | 95.2 | 7.7 | |||
| 125 | 5″ | 141.3 | 6.65 | STD | 127 | 4.8 | 190 | 6.8 | 79.4 | 3.4 |
| 9.5 | X.S | 127 | 6.5 | 190 | 10 | 79.4 | 5 | |||
| 100 | 4″ | 114.3 | 62 | STD | 101.6 | 2.8 | 152.4 | 4.2 | 63.5 | 2.1 |
| 8.56 | X.S | 101.6 | 3.9 | 152.4 | 5.7 | 63.5 | 2.9 | |||
| 80 | 3″ | 88.9 | 5.49 | STD | 76.2 | 1.45 | 114.3 | 2.18 | 50.8 | 1.1 |
| 7.62 | X.S | 76.2 | 1.95 | 114.3 | 2.86 | 50.8 | 1.45 | |||
| 65 | 21/2″ | 73 | 5.16 | STD | 63.5 | 0.95 | 95.2 | 1.46 | 44.4 | 0.73 |
| 71 | X.S | 63.5 | 1.27 | 95.2 | 1.82 | 44.4 | 0.91 | |||
| 50 | 2″ | 60.3 | 3.91 | STD | 50.8 | 0.5 | 76.2 | 0.72 | 34.9 | 0.36 |
| 5.54 | X.S | 50.8 | 0.68 | 76.2 | 1 | 34.9 | 0.5 | |||
| 40 | 11/2″ | 48.3 | 3.68 | STD | 38.1 | 0.26 | 57.1 | 0.4 | 28.6 | 0.2 |
| 58 | X.S | 38.1 | 0.35 | 57.1 | 0.5 | 28.6 | 0.25 | |||
| 32 | 11/4″ | 42.2 | 3.56 | STD | 31.75 | 0.18 | 47.6 | 0.28 | 25.4 | 0.14 |
| 4.85 | X.S | 31.75 | 0.24 | 47.6 | 0.39 | 25.4 | 0.2 | |||
| 25 | 1″ | 33.4 | 3.38 | STD | 25.4 | 0.11 | 38.1 | 0.15 | 22.2 | 09 |
| 4.55 | X.S | 25.4 | 0.14 | 38.1 | 0.19 | 22.2 | 0.11 | |||
| 20 | 3/4″ | 26.7 | 2.87 | STD | – | – | 28.6 | 08 | 11.1 | 04 |
| 3.91 | X.S | – | – | 28.6 | 0.11 | 11.1 | 05 | |||
| 15 | 1/2″ | 21.3 | 2.78 | STD | – | – | 38.1 | 08 | 15.9 | 04 |
| 3.73 | X.S | – | – | 38.1 | 0.10 | 15.9 | 05 | |||
Major Industrial ASTM A182 Alloy Steel Fittings & Flanges Export Countries
United Arab Emirates (UAE), Jordan, Bahrain, Kuwait, Oman, Qatar, Saudi Arabia, United States of America (USA), Singapore, Malaysia, Azerbaijan, Armenia, Georgia, Egypt, Algeria, Nigeria, South Africa, Kenya, Morocco, Ethiopia, Ghana, Tanzania, Sudan, Uganda, Angola.