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Hastelloy C276 Washers Suppliers & Exporters
If your chemical digesters, flue gas scrubbers, or sour gas units require extreme resistance to reducing environments and severe pitting, you've reached the right source. As a leading Hastelloy C276 Washers Supplier and Exporter, Aurum Overseas manufactures precision Plain, Spring, Lock, Square, and Conical fasteners to ASME B18.21.1, DIN 125, and ISO 7089 standards.
Our UNS N10276 Washers feature a nickel-molybdenum-chromium matrix with 15–17% molybdenum, providing exceptional resistance to localized crevice attack, chloride pitting, and stress corrosion cracking. Supplied with full EN 10204 3.1 MTR certifications, our Hastelloy C276 Washers are fully stocked for fast dispatch.
We export these washers to key global markets 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).
Technical Specifications
| Parameter | Technical Specification / Standard Range |
|---|---|
| Material Grade | Hastelloy C276 (Ni-Mo-Cr Alloy) |
| Forging Designation | ASTM B574 / UNS N10276 |
| UNS Designation | UNS N10276 |
| Manufacturing Standards | ASTM B575, ASME SB575, ASTM B574, ASME SB574 |
| Dimensional Specifications | ASME B18.21.1, DIN 125 A/B, DIN 127, DIN 9021, ISO 7089, ISO 7090 |
| Washer Types | Plain Washers, Spring Washers, Lock Washers, Square Washers, Conical Washers |
| Size Capability | Imperial: #4 to 4" NB | Metric: M3 to M100 |
| Thickness Range | 0.5 mm to 12 mm |
| Heat Treatment Condition | Solution Annealed (1150°C) + Rapid Water Quenched |
| Hardness Limit | 100 HRB max / 240 HB max |
Technical Properties & Chemical Composition
Equivalent Grades of Hastelloy C276 Washers
| STANDARD | WERKSTOFF NR. | UNS | EN |
|---|---|---|---|
| Hastelloy C276 | 2.4819 | N10276 | NiMo16Cr15W |
Chemical Composition of Hastelloy C276 Washers
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | 50.99 min |
| Molybdenum (Mo) | 15.00 – 17.00 |
| Chromium (Cr) | 14.50 – 16.50 |
| Iron (Fe) | 4.00 – 7.00 |
| Tungsten (W) | 3.00 – 4.50 |
| Cobalt (Co) | 2.50 max |
| Manganese (Mn) | 1.00 max |
| Silicon (Si) | 0.08 max |
| Phosphorus (P) | 0.04 max |
| Sulfur (S) | 0.03 max |
| Carbon (C) | 0.010 max |
Mechanical Properties of Hastelloy C276 Washers
| Property | Metric Value | Imperial Value |
|---|---|---|
| Ultimate Tensile Strength | 790 MPa min | 115,000 psi min |
| Yield Strength (0.2% Offset) | 355 MPa min | 52,000 psi min |
| Elongation (%) | 40% min | 40% min |
| Hardness (Rockwell B) | 100 HRB max | 100 HRB max |
| Density | 8.89 g/cm³ | 0.321 lb/in³ |
| Melting Point | 1370°C | 2500°F |
Types of Hastelloy C276 Washers
Aurum Overseas supplies a comprehensive range of Hastelloy C276 washer configurations manufactured according to standard DIN, ASME, and ISO dimensional tolerances for multiple engineering assemblies.
Hastelloy C276 Plain Washers
Hastelloy C276 Spring Washers
Hastelloy C276 Lock Washers
Hastelloy C276 Square Washers
Hastelloy C276 Conical Washers
Key Advantages
Reducing Environment Defense
High 15–17% molybdenum concentration provides outstanding resistance to aggressive reducing media like hydrochloric and sulfuric acids.
Severe Pitting Resistance
Superior resistance to localized chloride pitting and crevice oxidation in high-concentration ferric and cupric chloride solutions.
Intergranular Precipitation Immunity
Ultra-low carbon content (0.010% max) prevents grain-boundary carbide precipitation, ensuring full corrosion protection in as-welded joints.
Long-Term Cost Savings
Eliminates premature joint failures and frequent seal replacements in severe chemical process loops, maximizing plant uptime.
Key Applications of Hastelloy C276 Washers
| Industry Sector | Application | Operating Environment |
|---|---|---|
| Chemical Processing | Reactor vessel flanges, vapor condensers, and reboilers | Hot, contaminated mineral acids, wet chlorine gas, and organic solvents |
| Pulp & Paper Production | Bleaching towers, chlorine dioxide washers, and digesters | Hypochlorite solutions, chlorine dioxide liquors, and acidic processing fluids |
| Sour Gas Extraction | Subsea production valves, downhole piping, and gas scrubbers | High-pressure sour gas service containing H2S, CO2, and aqueous chlorides |
| Pollution Control | FGD scrubber stack liners, ductwork, and sulfur burners | Aggressive acid gas condensates and chloride-laden slurry environments |
| Waste Treatment | Evaporators, chemical incineration equipment, and waste recovery loops | Broad pH ranges with strong oxidizers and high-temperature waste fluids |
Quality Testing & Inspection
- Positive Material Identification (PMI): Spectrometric verification confirms precise chemical composition including Ni, Mo, Cr, W, and Fe fractions.
- Intergranular Corrosion Testing: Standardized ASTM testing verifies immunity to intergranular attack across heat-affected regions.
- Mechanical & Hardness Verification: Tensile and hardness testing guarantees compliance with 100 HRB maximum limits.
- Dimensional Conformance: Precision optical comparator inspections confirm exact tolerances against DIN, ISO, and ASME standards.
Global Export Markets
Aurum Overseas supplies fully certified Hastelloy C276 Washers to industrial projects across:
USA
Canada
Mexico
Germany
United
Kingdom
France
Italy
Netherlands
Norway
UAE
Saudi
Arabia
Qatar
Kuwait
Oman
Singapore
Malaysia
Australia
Frequently Asked Questions
Hastelloy C276 features higher molybdenum (up to 17%), giving it superior performance in strong reducing environments like hydrochloric acid, whereas C22 has higher chromium for oxidizing acids.
Yes. UNS N10276 washers meet NACE MR0175 / ISO 15156 hardness and metallurgy requirements for severe H2S sour gas environments.
Yes. Hastelloy C276 is one of the few metal alloys resistant to wet chlorine gas, hypochlorite, and chlorine dioxide solutions.
Hastelloy C276 fasteners maintain high corrosion resistance and structural integrity in continuous service environments up to 1040°C (1900°F).
Every shipment includes full EN 10204 3.1 Mill Test Reports detailing chemical heat analysis, mechanical tensile results, hardness limits, and PMI checks.
Contact Aurum Overseas
Aurum Overseas provides rapid delivery of certified Hastelloy C276 Washers for high-specification global infrastructure.
Contact our sales engineering team for technical assistance, material certifications, and rapid pricing.