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Hastelloy C22 C2000, B2, and B3 Pipes and Fittingss 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 C2000 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, including its C2000 variants (B2 and B3), is a high-performance nickel-based alloy widely used in pipe fittings for critical industrial applications. These fittings are designed for environments that demand exceptional corrosion resistance and mechanical reliability. They are particularly suitable for chemical processing, marine, and pollution control industries, where aggressive media can compromise standard materials.
Hastelloy C22 and C2000 pipe fittings consist primarily of nickel (around 56%), chromium (22%), and molybdenum (13%), with minor additions of tungsten, iron, and cobalt. This unique composition enhances resistance to both oxidizing and reducing environments, allowing the fittings to perform exceptionally well against acids, chlorides, and other corrosive chemicals.
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/C2000 fittings provide excellent mechanical strength and durability. Typical tensile strength ranges from 690–760 MPa, with yield strength around 310–380 MPa. They also exhibit elongation values of 30–40%, which ensures flexibility under mechanical stress. These properties make the fittings reliable for high-pressure piping systems and critical process applications.
One of the most notable features of Hastelloy C22/C2000 fittings is their superior corrosion resistance. They resist pitting, crevice corrosion, and stress corrosion cracking, even in harsh chemical and chloride-rich environments. This makes them ideal for seawater systems, chemical transport pipelines, and industrial processing units.
Specification Table
| Grade | Standard | Form | Type | Size Range | Pressure Rating |
|---|---|---|---|---|---|
| Hastelloy C22 | ASTM B366 / ASME SB366 | Seamless / Welded | Elbow, Tee, Reducer, Cap, Stub End | 1/2" – 48" | Class 150 – 2500 |
| Hastelloy C2000 | ASTM B574 / ASME SB574 | Seamless / Welded | Elbow, Tee, Reducer, Cap, Stub End | 1/2" – 48" | Class 150 – 2500 |
| Hastelloy B2 | ASTM B333 / ASME SB333 | Seamless / Welded | Elbow, Tee, Reducer, Cap, Stub End | 1/2" – 48" | Class 150 – 2500 |
| Hastelloy B3 | ASTM B575 / ASME SB575 | Seamless / Welded | Elbow, Tee, Reducer, Cap, Stub End | 1/2" – 48" | Class 150 – 2500 |
Chemical Composition (Typical ranges for SSS32760)
Note: Values are typical ranges. Final composition will be confirmed on MTC provided per lot.
| Grade | C | Mn | Si | Cr | Fe | Mo | W | Co | Ni | Cu | Other Elements |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Hastelloy C22 | 0.05 max | 1.0 max | 0.4 max | 20.0 – 22.0 | Balance | 12.0 – 14.0 | 2.0 – 3.0 | 0.5 max | 57.0 min | 1.0 max | Nb + Ta: 0.2 max |
| Hastelloy C2000 | 0.02 max | 1.0 max | 0.4 max | 20.0 – 23.0 | Balance | 12.0 – 15.0 | 3.0 – 4.0 | 0.5 max | 57.0 – 60.0 | 1.0 max | Nb + Ta: 0.3 max |
| Hastelloy B2 | 0.01 max | 1.0 max | 0.3 max | 1.0 max | Balance | 8.0 – 10.0 | – | – | Ni: 62.0 min | – | Cu: 1.0 max |
| Hastelloy B3 | 0.01 max | 1.0 max | 0.3 max | 0.2 – 1.0 | Balance | 8.0 – 10.0 | – | – | Ni: 62.0 min | – | Cu: 0.5 – 1.0 |
Mechanical Properties (Typical)
| Grade | Condition | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|---|
| Hastelloy C22 | Annealed | 620 – 860 | 275 – 415 | 40 – 50 | 200 – 250 |
| Hastelloy C2000 | Annealed | 650 – 900 | 300 – 450 | 35 – 45 | 210 – 260 |
| Hastelloy B2 | Annealed | 620 – 850 | 275 – 410 | 40 – 50 | 200 – 240 |
| Hastelloy B3 | Annealed | 630 – 870 | 280 – 420 | 38 – 48 | 205 – 245 |
Equivalent Grades
| Hastelloy Grade | UNS Number | EN / DIN | JIS | Other Standards |
|---|---|---|---|---|
| Hastelloy C22 | UNS N06022 | 2.4602 | – | ASTM B366, ASME SB366 |
| Hastelloy C2000 | UNS N06200 | – | – | ASTM B574, ASME SB574 |
| Hastelloy B2 | UNS N10665 | 2.4605 | – | ASTM B333, ASME SB333 |
| Hastelloy B3 | UNS N10675 | – | – | ASTM B575, ASME SB575 |
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 Size (inch) | DN | Schedule | Outside Diameter (mm) | Wall Thickness (mm) | Weight per Foot (kg/ft) |
|---|---|---|---|---|---|
| 1/2" | 15 | Sch 10 | 21.3 | 2.77 | 0.62 |
| 1" | 25 | Sch 40 | 33.4 | 3.56 | 1.34 |
| 2" | 50 | Sch 40 | 60.3 | 3.91 | 2.72 |
| 4" | 100 | Sch 40 | 114.3 | 6.02 | 6.81 |
| 6" | 150 | Sch 40 | 168.3 | 7.11 | 11.43 |
| 8" | 200 | Sch 40 | 219.1 | 8.18 | 17.25 |
| 10" | 250 | Sch 40 | 273.0 | 9.27 | 24.57 |
| 12" | 300 | Sch 40 | 323.9 | 10.97 | 33.40 |
Types Of Pipe Fittingss and Tubes
Tube Unions
Bite Type Tube Fittings
Stainless Steel Pipe Fittings
Forged Fsitting
Fitting
Carbon Steel Butt Weld Pipe Fittings
Frequently Asked Questions (FAQ)
1. What are Hastelloy C22, C2000, B2, B3 pipe fittings used for?
These pipe fittings are widely used in chemical processing, marine, pharmaceutical, and power generation industries where high corrosion resistance and durability are required at high temperatures.
2. What standards do these Hastelloy pipe fittings comply with?
They comply with ASTM and ASME standards such as ASTM B366 / ASME SB366 for C22, ASTM B574 / ASME SB574 for C2000, ASTM B333 / ASME SB333 for B2, and ASTM B575 / ASME SB575 for B3.
3. What grades are available for Hastelloy pipe fittings?
Available grades include C22, C2000, B2, and B3, each suitable for specific corrosion and temperature conditions.
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