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Hastelloy C22 / C276 Threaded Bars Overview
Aurum Overseas is a trusted Hastelloy C22 and Hastelloy C276 Threaded Bars Supplier & Exporter, stocking high-nickel fasteners made to ASTM B574 specifications. Engineered for extreme chemical processing, these alloy studs deliver ultimate durability in both oxidizing and reducing acid environments.
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Our inventory includes ASTM B574 UNS N10276 Threaded Bar stock featuring high Molybdenum content to prevent pitting in reducing media. For severe oxidizing conditions involving wet chlorine and ferric ions, our high-Chromium UNS N06022 Threaded Rods ensure complete corrosion protection.
Built for flue gas scrubbers, sour gas wells, and acid tanks, our UNS N10276 Threaded Rods maintain tight structural seals under extreme exposure. Contact Aurum Overseas for factory quotes, custom length sawing, and fast global shipping.
Technical Specifications
| Technical Parameter | Specification Standard |
|---|---|
| Material Specifications | ASTM B574, ASME SB574, EN 10204 3.1 |
| UNS Designations | UNS N10276 (Hastelloy C276) / UNS N06022 (Hastelloy C22) |
| Thread Size Range | M6 to M100 (1/4" to 4.0" Nominal Diameter) |
| Thread Profiles | UNC, UNF, UNEF, Metric Coarse, Metric Fine, Acme Threads |
| Length Options | 1,000 mm, 2,000 mm, 3,000 mm, Custom Cut-to-Length All-Thread Studs |
| Thread Class / Fit | Class 2A / 3A (Imperial) & 6g / 6h (Metric Profile Tolerances) |
| HSN Code | 75089090 |
Chemical Composition & Mechanical Properties
Equivalent Standards
| Grade | Standard | W.Nr. | UNS | JIS | EN |
|---|---|---|---|---|---|
| Hastelloy C276 | ASTM B574 | 2.4819 | N10276 | NW 0276 | NiMo16Cr15W |
| Hastelloy C22 | ASTM B574 | 2.4602 | N06022 | NW 6022 | NiCr21Mo14W |
Chemical Composition (%)
| Chemical Element | Hastelloy C276 (UNS N10276) | Hastelloy C22 (UNS N06022) |
|---|---|---|
| Nickel (Ni) | 50.99 min | 50.015 min |
| Chromium (Cr) | 14.50 – 16.50 | 20.00 – 22.50 |
| Molybdenum (Mo) | 15.00 – 17.00 | 12.50 – 14.50 |
| Iron (Fe) | 4.00 – 7.00 | 2.00 – 6.00 |
| Cobalt (Co) | 2.50 max | 2.50 max |
| Carbon (C) | 0.010 max | 0.010 max |
| Manganese (Mn) | 1.00 max | 0.50 max |
| Silicon (Si) | 0.08 max | 0.08 max |
| Phosphorus (P) | 0.04 max | 0.02 max |
| Sulfur (S) | 0.03 max | 0.02 max |
Mechanical & Physical Properties
| Property Parameter | Hastelloy C276 (UNS N10276) | Hastelloy C22 (UNS N06022) |
|---|---|---|
| Density | 8.89 g/cm³ | 8.69 g/cm³ |
| Melting Point | 1370 °C (2500 °F) | 1399 °C (2550 °F) |
| Tensile Strength (Min) | 790 MPa (115,000 Psi) | 690 MPa (100,000 Psi) |
| Yield Strength (0.2% Offset, Min) | 355 MPa (52,000 Psi) | 310 MPa (45,000 Psi) |
| Elongation (Min) | 40 % | 45 % |
Key Advantages of Hastelloy C22 / C276 Threaded Rods
Versatile Acid Defense
High Nickel and Molybdenum content stops severe corrosion in reducing acids like hydrochloric and hydrofluoric acid.
Resists Oxidizing Chemicals
Alloy C22's elevated Chromium content provides outstanding resistance to wet chlorine gas, ferric chloride, and nitric acid mixtures.
Immunity to Stress Cracking
High Nickel matrix prevents stress corrosion cracking and localized pitting in hot chloride solution environments.
Smooth & Secure Threading
Precision roll-threaded construction prevents thread stripping and jamming under high assembly torques.
Quality Testing & Inspection
Aurum Overseas subjects every order to strict quality control processes to ensure compliance with international fastener standards and client specifications:
- Chemical Heat Verification (PMI): Spectro / XRF material analysis verifying exact elemental chemistry against ASTM standards.
- Thread Pitch & Gage Inspection: Go/No-Go thread gage and optical comparator testing ensuring class 2A/3A and 6g pitch tolerances.
- Mechanical Property Certification: Factory batch verification of tensile, yield strength, and elongation supported by EN 10204 3.1 MTRs.
- Optional Third-Party Testing: Intergranular corrosion testing (ASTM G28), Proof Load testing, or Ultrasonic NDT provided upon request.
Global Export Markets
As an established Hastelloy C22 & C276 Threaded Bars Exporter, Aurum Overseas supplies fully certified ASTM B574 UNS N10276 and UNS N06022 threaded rods to global chemical processing, offshore, and high-strength industrial facilities:
USA
Canada
Mexico
Germany
United
Kingdom
France
Italy
Netherlands
Belgium
Spain
Poland
UAE
Saudi
Arabia
Qatar
Kuwait
Oman
Bahrain
Frequently Asked Questions
Hastelloy C276 has higher Molybdenum (15–17%) for superior resistance in strongly reducing environments, whereas Hastelloy C22 has higher Chromium (20–22.5%) providing better protection in strongly oxidizing media.
They perform reliably up to 1040 °C (1900 °F) in non-stress applications, though for high-load structural flange bolting in corrosive media, temperatures are typically capped at 400 °C (750 °F).
They are widely used in sour gas processing plants, oil refinery desulfurization units, and chemical synthesis reactors across the UAE, Saudi Arabia, Qatar, and Oman.
Contact Aurum Overseas
Contact Aurum Overseas, a trusted Hastelloy C22 & C276 Threaded Bars Supplier & Exporter, for certified nickel alloy threaded rods, custom length sawing, and fast international delivery.