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Hastelloy C22, B2, and B3 Pipes and Tubes are high-performance nickel-based alloys engineered for maximum resistance to corrosion, oxidation, and chemical attack. These pipes are widely used in chemical processing, pharmaceutical, power generation, and marine industries, where extreme durability and chemical resistance are essential.
Hastelloy C22 is known for its outstanding resistance to oxidizing and reducing agents, including ferric and cupric chlorides, acetic and formic acids, and seawater. This makes it an ideal choice for chemical reactors, scrubbers, heat exchangers, and piping systems handling highly corrosive fluids.
Hastelloy C22, often designated as B2 or B3 in specific applications, is a high-performance nickel-based alloy known for its exceptional corrosion resistance. C22 pipes and tubes are widely used in environments where chemical attack, oxidation, and stress corrosion cracking are concerns. They are especially suitable for chemical processing, pollution control, and marine industries.
Hastelloy C22 typically contains 56% nickel, 22% chromium, 13% molybdenum, and small amounts of tungsten, iron, and cobalt. The combination of these elements provides outstanding resistance to oxidizing and reducing environments, particularly against acids like hydrochloric, sulfuric, and phosphoric acid. This makes C22 superior to many other nickel alloys in aggressive chemical processes.
Hastelloy B2 is formulated to resist hydrochloric acid in all concentrations and temperatures. It also provides excellent protection against hydrogen chloride, sulfuric acid, and phosphoric acid, making it suitable for pickling systems, chemical reactors, and vacuum processing equipment.
Hastelloy B3 improves upon B2 by offering enhanced thermal stability and better resistance to pitting, stress corrosion cracking, and thermal cycling. It is preferred in applications involving strong reducing agents and harsh chemical environments that demand both durability and long-term reliability.
C22 pipes and tubes possess excellent mechanical strength and toughness. The alloy has a tensile strength ranging from 690–760 MPa and a yield strength around 310–380 MPa. Its elongation is typically 30–40%, providing flexibility for piping systems under high pressure and thermal stress. This combination of strength and ductility makes C22 ideal for industrial pipelines and process equipment.
The hallmark of Hastelloy C22 is its resistance to corrosion in harsh environments. It can withstand strong oxidizing and reducing chemicals, chloride-containing media, and even seawater exposure. Its high resistance to pitting, crevice corrosion, and stress corrosion cracking ensures long-term reliability and reduces the need for frequent maintenance.
Specification Table
| Alloy Grade | Form | Standard | Application | Type |
|---|---|---|---|---|
| Hastelloy C22 | Seamless / Welded / ERW | ASTM B622, ASTM B619, ASME SB622 | Chemical reactors, heat exchangers, scrubbers, piping systems | Pipe & Tube |
| Hastelloy B2 | Seamless / Welded / ERW | ASTM B622, ASTM B619, ASME SB622 | Pickling systems, hydrochloric acid handling, vacuum processing equipment | Pipe & Tube |
| Hastelloy B3 | Seamless / Welded / ERW | ASTM B622, ASTM B619, ASME SB622 | Strong reducing agents, thermal cycling environments, chemical process piping | Pipe & Tube |
Chemical Composition (Typical ranges for SSS32760)
Note: Values are typical ranges. Final composition will be confirmed on MTC provided per lot.
| Alloy Grade | Nickel (Ni) | Chromium (Cr) | Molybdenum (Mo) | Cobalt (Co) | Manganese (Mn) | Iron (Fe) | Carbon (C) | Other Elements |
|---|---|---|---|---|---|---|---|---|
| Hastelloy C22 | 56 min | 20–22 | 12–14 | 1.5 max | 1.0 max | 3.0 max | 0.10 max | Tungsten 2.5–3.5, Iron balance |
| Hastelloy B2 | 63 min | 1.0 max | 2.5–3.5 | 1.5 max | 1.0 max | 6.0 max | 0.10 max | Copper 0.5 max, Iron balance |
| Hastelloy B3 | 62–66 | 0.2–1.0 | 2.5–3.5 | 1.0 max | 1.0 max | 5.0 max | 0.10 max | Copper 0.5 max, Iron balance |
Mechanical Properties (Typical)
| Alloy Grade | Condition | Density (g/cm³) | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|---|---|
| Hastelloy C22 | Annealed | 8.94 | 620–760 | 310–415 | 40–50 | 175–205 |
| Hastelloy B2 | Annealed | 8.92 | 550–700 | 275–380 | 35–45 | 160–190 |
| Hastelloy B3 | Annealed | 8.91 | 580–720 | 290–390 | 38–48 | 165–195 |
Equivalent Grades
| Alloy Grade | UNS | EN / DIN | JIS | Other Standards |
|---|---|---|---|---|
| Hastelloy C22 | UNS N06022 | 2.4602 | なし | ASTM B622, ASME SB622 |
| Hastelloy B2 | UNS N10665 | 2.4617 | なし | ASTM B619, ASME SB619 |
| Hastelloy B3 | UNS N10675 | 2.4600 | なし | ASTM B622, ASME SB622 |
Dimension & Weight Chart (Selected common sizes)
Below is a representative chart showing outside diameter, wall thickness, inside diameter, cross-sectional area of metal and calculated weight per metre (kg/m). Values are calculated using density = 7.93 g/cm³ and are for guidance — use actual MTC values for procurement & engineering.
| Nominal Pipe Size (NPS) | Outside Diameter (OD) mm | Wall Thickness (WT) mm | Weight per Meter (kg/m) |
|---|---|---|---|
| 1/2" | 21.3 | 2.77 | 1.20 |
| 3/4" | 26.7 | 2.87 | 1.65 |
| 1" | 33.4 | 3.38 | 2.30 |
| 1 1/2" | 48.3 | 3.68 | 3.70 |
| 2" | 60.3 | 3.91 | 5.10 |
| 3" | 88.9 | 4.55 | 9.20 |
| 4" | 114.3 | 4.85 | 13.50 |
| 6" | 168.3 | 5.54 | 23.80 |
| 8" | 219.1 | 6.35 | 34.90 |
Types Of Hastelloy C22 B2 B3 Pipe and Tubes
SS S32760 Seamless Pipe
SS S32760 Welded Pipe
SS S32760 ERW Pipe
SS S32760S EFW Pipe
Low Temperature Carbon Steel A333S Seamless Tube
S32760H Super Duplex Steel Welded Tube
S32760 Super Duplex Steel Capillary Tube
S32760H Super Duplex Steel Heat Exchanger Tubes
Frequently Asked Questions (FAQ)
Q1: What industries use Hastelloy C22, B2, and B3 Pipes and Tubes?
A: These pipes are widely used in chemical processing, pharmaceutical, marine, power generation, and pollution control industries due to their superior corrosion resistance and mechanical strength.
Q2: What forms are available for Hastelloy C22 / B2 / B3 Pipes?
A: They are available in seamless, welded, and ERW forms to suit various fabrication and installation requirements.
Q3: Which standards do Hastelloy C22 / B2 / B3 Pipes conform to?
A: These alloys conform to ASTM standards (B622, B619) and ASME specifications (SB622, SB619), ensuring quality and reliability.
Pipes & Tubes Supplier
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