Table of Contents
- Hastelloy Fasteners Overview
- Hastelloy Fasteners Specifications
- What are Hastelloy C22 / C276 Nuts?
- Hastelloy Fasteners Technical Properties & Composition
- Why Industries Prefer Hastelloy C22 / C276 Nuts
- Types of Hastelloy C22 / C276 Nuts
- Key Advantages of Hastelloy C22 / C276 Nuts
- Key Applications of Hastelloy C22 / C276 Nuts
- Quality Testing & Inspection
- Global Export Markets
- Frequently Asked Questions
- Contact Aurum Overseas
Hastelloy C22 / C276 Nuts Suppliers & Exporters
Aurum Overseas is a trusted Hastelloy C22 / C276 Nuts Supplier and Hastelloy C22 / C276 Nuts Exporter, delivering nickel-chromium-molybdenum fasteners engineered for severe chemical, pharmaceutical, and pollution control environments.
Manufactured to ASTM B574 UNS N10276 Nuts and ASTM B574 UNS N06022 Nuts standards, these high-nickel alloy components offer exceptional protection against strong oxidizers, wet chlorine gas, ferric chlorides, and hot contaminated mineral acids.
As an established Hastelloy C22 / C276 Nuts Exporter, Aurum Overseas supplies fully tested and traceable bolting components across North America (USA, Canada, Mexico), Europe (Germany, UK, France, Italy, Netherlands, Norway), the Middle East (UAE, Saudi Arabia, Qatar, Kuwait, Oman), and Asia-Pacific (Singapore, Malaysia, Australia).
Hastelloy Fasteners Specifications
| Parameter | Specification / Technical Range |
|---|---|
| Material Grade | Hastelloy C276 / Hastelloy C22 / Alloy C276 / Alloy C22 |
| UNS Number | UNS N10276 (C276) / UNS N06022 (C22) |
| Werkstoff Number | 2.4819 (C276) / 2.4602 (C22) |
| Common Trade Names | Hastelloy C-276 / Hastelloy C-22 / N10276 / N06022 |
| Manufacturing Standards | ASTM B574, ASME SB574, DIN 934, ISO 4032, ANSI B18.2.2 |
| Size Range | M3 to M100 | 3/16" to 4" | Custom Dimensions |
| Thread Configuration | ASME B1.1 2A/3A - 2B/3B Unified (UNC, UNF, 8UN) & B1.13M Metric |
| Nut Formats | Hex Head, Heavy Hex, Square, Lock, Slotted, Coupling, Flange Nuts |
| Testing Standards | ASTM E8, SAE J411, EN 14399, ASME B1.2, ISO 7090, DIN 125 |
What are Hastelloy C22 / C276 Nuts?
UNS N10276 / N06022 Nuts are nickel-molybdenum-chromium superalloy fasteners designed to withstand severe chemical processing conditions where stainless steel and duplex grades experience rapid degradation.
While ASTM B574 UNS N10276 Nuts utilize high molybdenum (15% to 17%) to resist strong reducing environments like hydrochloric and sulfuric acid, ASTM B574 UNS N06022 Nuts feature higher chromium (around 22%) to deliver superior protection in aggressive oxidizing streams, such as nitric acid mixtures and wet chlorine gas.
Hastelloy Fasteners Technical Properties & Composition
Chemical Composition of Hastelloy C22 / C276 Nuts (%)
| Element | Hastelloy C276 (UNS N10276) | Hastelloy C22 (UNS N06022) |
|---|---|---|
| Nickel (Ni) | 50.99 min | ~56.00 (Balance) |
| Chromium (Cr) | 14.50 – 16.50 | 20.00 – 22.50 |
| Molybdenum (Mo) | 15.00 – 17.00 | 12.50 – 14.50 |
| Tungsten (W) | 3.00 – 4.50 | 2.50 – 3.50 |
| Iron (Fe) | 4.00 – 7.00 | 2.00 – 6.00 |
| Cobalt (Co) | 2.50 max | 2.50 max |
| Carbon (C) | 0.010 max | 0.015 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 |
Physical & Thermal Properties of Hastelloy C22 / C276
| Property / Parameter | Hastelloy C276 (N10276) | Hastelloy C22 (N06022) |
|---|---|---|
| Density (g/cm³ / lb/in³) | 8.89 / 0.321 | 8.61 / 0.311 |
| Melting Point (°C / °F) | 1370 / 2500 | 1351 – 1387 / 2464 – 2529 |
| Tensile Strength (MPa / ksi) | 790 / 115 | 800 – 1100 / 116 – 159 |
| Yield Strength (0.2% Offset, MPa / ksi) | 355 / 52 | 350 / 50 |
| Elongation (%) | 40 | 45 |
Equivalent Grade Standards
| Grade | Standard | Werkstoff Nr. | UNS | EN / ISO | JIS |
|---|---|---|---|---|---|
| Hastelloy C276 | ASTM B574 | 2.4819 | N10276 | NiMo16Cr15W | NW 0276 |
| Hastelloy C22 | ASTM B574 | 2.4602 | N06022 | NiCr21Mo14W | NW 6022 |
Why Industries Prefer Hastelloy C22 / C276 Nuts
Chemical and pharmaceutical manufacturers rely on Hastelloy C22 / C276 Nuts because they remain immune to chloride-induced stress corrosion cracking and resist intergranular precipitation during welding.
As a knowledgeable Hastelloy C22 / C276 Nuts Supplier, Aurum Overseas helps customers choose the ideal grade: C276 excels in harsh reducing acid streams, while C22 provides broader protection in mixed acid systems containing both oxidizing and reducing contaminants.
Types of Hastelloy C22 / C276 Nuts
Aurum Overseas supplies a comprehensive range of Hastelloy C22 / C276 nut configurations manufactured according to standard DIN, ASME, and ISO dimensional tolerances for multiple engineering assemblies.
Hastelloy C22 / C276 Hex Head Nuts
Hastelloy C22 / C276 Square Nuts
Hastelloy C22 / C276 Lock Nuts
Hastelloy C22 / C276 Eye Nuts
Hastelloy C22 / C276 Wing Nuts
Hastelloy C22 / C276 T Nuts
Hastelloy C22 / C276 Panel Nuts
Hastelloy C22 / C276 Coupling Nuts
Hastelloy C22 / C276 Dome Nuts
Key Advantages of Hastelloy C22 / C276 Nuts
Versatile Chemical Resistance
C22 and C276 grades protect equipment in both oxidizing and reducing chemical processes.
Immunity to Chloride SCC
High nickel matrix prevents stress corrosion cracking in high-temperature brine and chloride solutions.
Low Carbon Content
Ultra-low carbon prevents carbide precipitation during welding, maintaining joint integrity.
Resistance to Pitting & Crevice Attack
Molybdenum and tungsten content provide extreme resistance to localized pitting in stagnant media.
High Heat Resistance
Maintains strength and stability at high operating temperatures above 400°C.
Key Applications of Hastelloy C22 / C276 Nuts
| Industry Sector | Primary Fastener Application | Key Service Environment |
|---|---|---|
| Chemical Processing | Reactor vessel flanges, distillation column bolting | Hot hydrochloric acid, acetic anhydride, and contaminated organic acids |
| Pharmaceutical Production | Batch reactor agitator mounts, process piping joints | High-purity active pharmaceutical synthesis in aggressive solvents |
| Flue Gas Desulfurization (FGD) | Scrubber absorber towers, duct liner fasteners | Sulfurous acid mist, wet chlorine gas, and acidic scrubber slurries |
| Waste Treatment & Incineration | Toxic waste incinerator spray nozzles, heat exchangers | Severe mixed-chemical waste gas streams at elevated temperatures |
Quality Testing & Inspection
Aurum Overseas applies strict quality testing for every order shipped as a dedicated Hastelloy C22 / C276 Nuts Supplier and Hastelloy C22 / C276 Nuts Exporter.
- Chemical & Alloy Verification: XRF spectrometry and Positive Material Identification (PMI) to confirm precise nickel, molybdenum, and chromium ratios.
- Mechanical Strength Testing: Tensile, proof load, and hardness testing performed per ASTM E8 and SAE standards.
- Dimensional Precision: Thread pitch and flatness checking per ASME B1.2, ISO 7090, and DIN 125 standards.
- Traceable Documentation: Complete EN 10204 3.1 MTRs providing detailed heat analysis and mechanical test data with every order.
Global Export Markets
As a global Hastelloy C22 / C276 Nuts Exporter, Aurum Overseas supplies fully certified fasteners to major chemical processing and pharmaceutical manufacturing hubs worldwide.
USA
Canada
Mexico
Germany
United
Kingdom
France
Italy
Netherlands
Norway
UAE
Saudi
Arabia
Qatar
Kuwait
Oman
Singapore
Malaysia
Australia
Frequently Asked Questions
Hastelloy C276 has higher molybdenum (15% to 17%) for better performance in reducing acids like hydrochloric acid. Hastelloy C22 has higher chromium (around 22%) for superior protection in strong oxidizing media.
UNS N10276 / N06022 Nuts are made according to ASTM B574 UNS N10276 Nuts and ASTM B574 UNS N06022 Nuts specifications.
Yes, Hastelloy C276 is one of the few metals that can handle wet chlorine gas, hypochlorites, and chlorine dioxide solutions without pitting.
Yes, their high nickel content (over 50%) makes both C22 and C276 virtually immune to chloride-induced stress corrosion cracking.
Yes, as a leading Hastelloy C22 / C276 Nuts Exporter, Aurum Overseas supplies fully certified nuts across North America, Europe, the Middle East, and Asia-Pacific.
We offer metric threads (M3 to M100) and imperial Unified threads (UNC, UNF, 8UN) to fit standard ASME flanges and chemical equipment.
Yes, as a reliable Hastelloy C22 / C276 Nuts Supplier, every shipment includes complete 3.1 test certificates detailing chemical heat numbers and strength test results.
Contact Aurum Overseas
Aurum Overseas provides high-performance Hastelloy C22 / C276 Nuts manufactured to strict international quality standards with rapid global dispatch.
Contact our sales engineering team today for technical support and prompt commercial quotes.