Introduction:
In high-pressure, high-temperature applications, the reliability and strength of components like flanges are critical. One such trusted material is ASTM A182 F22 Class 3, a low-alloy steel containing chromium and molybdenum. At Anita Steel & Metals, we offer a full range of ASTM A182 F22 Cl.3 flanges that meet stringent global standards, including IBR and NACE compliance, ensuring safe, efficient, and durable performance in demanding industrial environments.
What is ASTM A182 F22 Cl.3?
ASTM A182 F22 Cl.3 is a forged low alloy steel, primarily used in high-temperature services such as boilers, pressure vessels, and petrochemical pipelines. The "Class 3" variant refers to its enhanced mechanical properties and higher hardness compared to Class 1 or Class 2.
Chemical Composition:
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.05 – 0.15 |
| Manganese | 0.30 – 0.60 |
| Silicon | 0.50 max |
| Chromium | 1.90 – 2.60 |
| Molybdenum | 0.87 – 1.13 |
| Phosphorus | ≤ 0.035 |
| Sulfur | ≤ 0.040 |
This composition offers excellent strength, hardness, and corrosion resistance, especially in elevated temperature environments.
Mechanical Properties (Class 3):
| Property | Value |
|---|---|
| Tensile Strength | ≥ 585 MPa |
| Yield Strength | ≥ 380 MPa |
| Elongation | ≥ 20% |
| Hardness | 179 – 235 HBW |
These mechanical values make it suitable for high-pressure steam and process applications.
Technical Specifications:
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Standards: ASTM A182 / ASME SA182
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Face Type: Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF)
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Dimensions: ASME B16.5 / B16.47 (Series A & B)
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Pressure Rating: Class 150 to 2500
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Size Range: ½” to 48” (DN15 to DN1200)
Product Types Available:
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WNRF – Weld Neck Raised Face
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WNRTJ – Weld Neck Ring Type Joint
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SWRF – Socket Weld Raised Face
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SWRTJ – Socket Weld Ring Type Joint
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SORF – Slip-On Raised Face
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BLRF – Blind Raised Face
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BLRTJ – Blind Ring Type Joint
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LJRF – Lap Joint Raised Face
We also offer custom-machined flanges as per client drawings.
Equivalent Grades:
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EN: 10CrMo9-10
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DIN: 1.7380
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BS: 622B
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JIS: SFVC2B / SCMV4
Key Features:
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High strength under elevated temperatures
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IBR Form III certified
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NACE MR0175 compliant for sour service
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CNC machined for precision and durability
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Full traceability with MTC (EN 10204 3.1)
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Excellent resistance to thermal fatigue and corrosion
Melting & Manufacturing Process:
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Melting Method: Electric Arc Furnace / Vacuum Arc Remelting (VAR)
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Heat Treatment: Normalizing & Tempering
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Surface Finish: Rust preventive oil, blackodised or as per request
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Inspection: PMI, UT, NDT, Hydro, NACE, IGC (as applicable)
Applications:
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Thermal Power Plants – Superheated steam lines
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Refineries – High-pressure piping and reactors
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Petrochemical Units – Corrosive and high-temperature services
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Oil & Gas – Sour gas applications (NACE approved)
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Boilers & Pressure Vessels – IBR certified piping
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Heat Exchangers – Flanged tube sheets & headers
Packaging Details:
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Bubble-wrapped or oil-coated
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Individually tagged with Heat No., Grade, Size, and Standard
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Packed in export-quality wooden boxes or fumigated pallets
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Option for logo-marking & QR-code-based traceability
Our Brand – Anita Steel & Metals:
Established in 1970, Anita Steel & Metals is a trusted manufacturer and stockist of Alloy Steel Flanges in India, known for quality, prompt service, and global supply capability.
All flanges are available with:
✔️ MTC (EN 10204 3.1)
✔️ IBR Certification (Form III)
✔️ NACE MR0175 Compliance
✔️ ISO 9001:2015 System Approval
Contact Us:
Anita Steel & Metals
📧 Email: info@anitasteel.com
🌐 Website: www.anitasteel.com
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