Hastelloy C276 Bolts Supplier
- Reliability in the Most Severe Environments
- Long Service Life and Low Maintenance Costs
- Stable Performance in Weld‑Affected Zones
Hastelloy C276 Bolts: The Premium Alloy Solution for Demanding Corrosion Resistance
SSM provides Hastelloy C276 bolts, a nickel-molybdenum-chromium superalloy engineered for exceptional resistance to a wide range of severe corrosive environments. These fasteners are renowned for their outstanding performance in both oxidizing and reducing conditions, offering strong resistance to pitting, crevice corrosion, and stress-corrosion cracking.
Hastelloy C276 alloy delivers a reliable balance of excellent chemical stability across numerous aggressive media, good thermal stability, and robust mechanical strength. It exhibits superior resistance to chlorides, wet chlorine, mixed acids, and a variety of chemical process contaminants.
As a cost-effective and widely proven material, Hastelloy C276 bolts are an excellent choice for demanding applications in chemical processing, flue gas desulfurization (FGD), pollution control, pulp and paper production, and waste treatment industries.
Technical Specifications
| Parameter | Beschreibung |
| Product Name | Hastelloy C276 Bolts / Stud Bolts |
| Material | Nickel-Molybdenum-Chromium Alloy UNS N10276 / W.Nr. 2.4819 |
| Produkttyp | Bolts, Stud Bolts, Threaded Rods, Special Fastener Shapes |
| Key Strengths | Excellent broad-spectrum corrosion resistance in reducing and moderately oxidizing environments (resists pitting, crevice, and stress-corrosion cracking); good thermal stability and mechanical strength; well-established, cost-effective performance. |
| Strengthening Method | Cold Worked (primary method for achieving high strength). *Note: Hastelloy C276 is a solid-solution strengthened alloy and is not age-hardenable.* |
| Wärmebehandlung | Solution Annealing (typically 1121-1177°C / 2050-2150°F) followed by rapid cooling (water quench) to dissolve detrimental secondary phases and restore optimal corrosion resistance. |
| Temperaturbereich | Cryogenic to approx. 1040°C (1900°F). Suitable for continuous service in oxidizing atmospheres; prolonged exposure within the 425-550°C (800-1025°F) range requires evaluation for risk of sigma phase precipitation. |
| Korrosionsbeständigkeit | Outstanding resistance to: wet chlorine & hypochlorites, hydrochloric acid at all concentrations, sulfuric & phosphoric acids, organic acids; chloride-containing media (e.g., FeCl₃, CuCl₂), mixed acids, contaminated process streams, and Flue Gas Desulfurization (FGD) environments. Limited in strong oxidizing media like nitric acid. |
| Unique Property | Low magnetic permeability; Excellent weldability with good as-welded corrosion resistance, typically eliminating the need for post-weld heat treatment; High Pitting Resistance Equivalent Number (PREN). |
| Geltende Normen | ASTM / ASME (B574, B575, F468), AMS 5756, DIN 17744, ISO 6208 (customizable) |
| Größenbereich | Customized (M3 to M64 & equivalent inch series) |
| Oberflächenfinish | Pickled & Clean (post-anneal) / Bright Machined. Passivation is not applicable (as it is not a stainless steel). |
| Primary Applications | Flue Gas Desulfurization (FGD) systems, chemical process equipment (especially chlorine & reducing acid services), pulp & paper industry, waste treatment, acid gas handling, pharmaceutical processing, marine and offshore components. |
| Certification | EN 10204 3.1 / 3.2 Material Certificates, Mill Test Reports, PMI (Positive Material Identification) Report, Full Traceability. |
| Warranty | As per specific contract and applicable service conditions |
| After-sales Service | Complete technical documentation, critical application analysis & alloy selection consultation (e.g., C276 vs. C-22 vs. 625), welding and fabrication support, failure analysis. |
Material Properties – Hastelloy C276 Bolts
Hastelloy C276 is a nickel-chromium-molybdenum alloy renowned for its versatile and excellent corrosion resistance across a wide range of severe environments. It offers a robust combination of strong resistance to both oxidizing and reducing media, good resistance to localized corrosion (pitting, crevice, and stress-corrosion cracking), along with good thermal stability and fabricability. As a solid-solution strengthened, non-age-hardenable material, its strength for fasteners is primarily achieved through cold working.
Chemical Composition (wt.%)
(Conforms to ASTM B574 / ASME SB-574 for UNS N10276)
| Element | Content Range (Typical) | Primary Function |
| Nickel (Ni) | Balance (~57%) | Base element, provides fundamental metallurgical stability and resistance to reducing environments and stress-corrosion cracking. |
| Chrom (Cr) | 14.5 – 16.5% | Imparts resistance to oxidizing media and hot oxidizing salts. Critical for sulfidizing and high-temperature oxidation resistance. |
| Molybdän (Mo) | 15.0 – 17.0% | Provides primary resistance to reducing acids (e.g., HCl, H₂SO₄) and is the key element for resisting pitting and crevice corrosion in chloride environments. |
| Eisen (Fe) | 4.0 – 7.0% | Balancing element; content is controlled for cost-effectiveness and structural stability. |
| Wolfram (W) | 3.0 – 4.5% | Enhances overall corrosion resistance in mixed acids and contributes to thermal stability. |
| Kobalt (Co) | ≤ 2,51 TP3T | Impurity element, strictly controlled. |
| Mangan (Mn) | ≤ 1,01 TP3T | Maximum allowable impurity. |
| Vanadium (V) | ≤ 0,351 TP3T | Maximum allowable impurity. |
| Silizium (Si) | ≤ 0,081 TP3T | Strictly controlled impurity to prevent deleterious phase formation. |
| Kohlenstoff (C) | ≤ 0,01% | Extremely low carbon minimizes carbide precipitation in weld-affected zones, preserving corrosion resistance. |
| Phosphor (P) | ≤ 0,041 TP3T | Strictly controlled harmful impurity. |
| Schwefel (S) | ≤ 0,03% | Strictly controlled harmful impurity. |
Typical Mechanical Properties for Fasteners
Annealed Condition (Solution Treated & Quenched):
- Tensile Strength: 690 – 827 MPa (100 – 120 ksi)
- Yield Strength (0.2% Offset): 283 – 414 MPa (41 – 60 ksi)
- Verlängerung: ≥ 40%
- Hardness: Rockwell B 85 – 98
Cold Worked Condition (for higher strength fasteners):
- Tensile Strength: 827 – 1034 MPa (120 – 150 ksi) or higher
- Yield Strength (0.2% Offset): 690 – 896 MPa (100 – 130 ksi) or higher
- Verlängerung: 15% – 30%
- Hardness: Rockwell C 19 – 28 (approx.)
Hastelloy C276 Bolts Typical Applications
Chemical Processing Industry (CPI)
Pollution Control & Flue Gas Desulfurization (FGD)
Oil, Gas, and Petrochemical
Pulp and Paper
Pharmaceutical and Fine Chemical Industrie
Energy and Power Generation
Flanschanbieter aus einer Hand für alle Ihre Anforderungen
SSM has significant product advantages in manufacturing Hastelloy C76 Bolts. Whether it’s quality or price, we will meet your needs.
Hastelloy C276 Bolts Standards and Specifications
Hastelloy C276 bolts are a high-performance, corrosion-resistant fastener solution designed for severe chemical environments. They are valued for their excellent resistance to reducing and moderately oxidizing acids, exceptional performance in chloride-induced pitting/crevice corrosion, and resistance to stress-corrosion cracking. Widely used in chemical processing, flue gas desulfurization (FGD), pollution control, and marine industries, the main standards and specifications are organized below.
| Kategorie | Standard / System | Description / Notes (For Hastelloy C276 Bolts) |
| Material Standards | UNS N10276 | Nickel-chromium-molybdenum-tungsten alloy grade. The core identification for this versatile, widely adopted corrosion-resistant alloy. |
| ASTM B574 / ASME SB-574 | Standard specification for bar and wire (primary material standard). | |
| ASTM B575 / ASME SB-575 | Standard specification for plate, sheet, and strip. | |
| ASTM B366 / ASME SB-366 | Standard specification for nickel alloy forgings. | |
| AMS 5756 | Aerospace Material Specification for bar, forgings, and rings. | |
| Fastener Standards | ASTM F468 / F468M | Nonferrous bolts, hex cap screws, and studs for general use (inch/metric). Key fastener specification. |
| ASME B18.2.1 / B18.31.2 | Hex bolts and stud bolts dimensional standards. | |
| MIL Specs (e.g., MIL-DTL-46882) | May be referenced for defense applications; grade must be specified as UNS N10276. | |
| European / International Standards | DIN 17744 / W.Nr. 2.4819 | German standard for nickel and nickel alloy semi-finished products. |
| EN 10204 3.1 / 3.2 | Material test certificate (mandatory for EU projects). | |
| Chemical, Metallurgical & Processing | ASTM B574 / AMS 5756 | Define required chemical composition ranges for UNS N10276. |
| Wärmebehandlung | Solution Annealed & Quenched (typically 1121-1177°C / 2050-2150°F). Essential to dissolve harmful secondary phases and achieve optimal corrosion resistance. | |
| Magnetic Property | Essentially non-magnetic (austenitic structure). | |
| Inspection & Testing | ASTM E8 | Tensile testing at room temperature (mandatory). |
| ASTM E10 / E18 | Brinell/Rockwell hardness testing. | |
| PMI Testing (XRF / OES) | Critical to confirm alloy grade and distinguish from similar alloys (e.g., C-22, 625, C-2000). | |
| Intergranular Corrosion Test | Often specified per ASTM G28 Method A to verify resistance to intergranular attack, especially in weld-affected zones. | |
| Pitting/Crevice Corrosion Test | May be specified per ASTM G48 Methods A, B, C, D, F to evaluate resistance to chloride-induced localized corrosion. | |
| Microstructure Examination | Per ASTM E112 / E562 to check for deleterious phase precipitation (e.g., μ-phase, σ-phase). | |
| Oberflächenbehandlung | Cleaning / Pickling | Per ASTM B366 or internal procedures to remove heat treatment scale. Essential for corrosion performance. |
| Passivation | Not applicable. Hastelloy C276 does not rely on a chromium oxide passive layer like stainless steel; its corrosion resistance is inherent to the bulk alloy. | |
| Anti-Galling Coatings | May be applied (e.g., PTFE, Molykote, nickel plating) based on application requirements to prevent thread galling. | |
| Industry Standards / References | ASME Boiler & Pressure Vessel Code, Section II & VIII | Referenced for pressure vessel, heat exchanger, and reactor components. |
| NACE MR0175 / ISO 15156 | Material requirements for sour (H₂S) service. C276 has excellent resistance to sulfide stress cracking (SSC). | |
| FGD & Pollution Control Standards | Widely referenced for scrubbers, absorbers, ducting, and chimney liners in power and chemical plants. | |
| Chemical & Petrochemical Standards (e.g., API, ISO) | Referenced for reactors, piping, and equipment in aggressive acid and chloride services. | |
| Marine & Offshore Standards (e.g., NORSOK, DNV) | Referenced for seawater handling systems, chlorination units, and topside components exposed to marine atmospheres. |
Hastelloy C276 is a high-performance nickel-chromium-molybdenum-tungsten alloy renowned for its excellent and versatile corrosion resistance — capable of withstanding reducing acids, moderately oxidizing media, aggressive chloride environments, and complex mixed-chemical conditions — coupled with strong resistance to localized attack (pitting, crevice corrosion, and stress-corrosion cracking) and good thermal stability. As a solid-solution strengthened alloy, its high strength is typically achieved through cold working. It is a widely trusted and cost-effective material choice for demanding applications in chemical processing, flue gas desulfurization (FGD), pollution control, and marine industries where reliable performance in severe, often chloride-rich environments is essential.
Weitere Ressourcen:
Verwandte Produkte
ASTM A193 B8M Bolts with A194 B8M Nuts
Reliability in the Most Severe Environments Long Service Life and Low Maintenance Costs Stable Performance in Weld‑Affected Zones ASTM A193
ASTM A193 B8 bolts with A194 B8 Nuts
Reliability in the Most Severe Environments Long Service Life and Low Maintenance Costs Stable Performance in Weld‑Affected Zones ASTM A193
ASTM A193 B7 Stud Bolts with A194 2H Nuts
Reliability in the Most Severe Environments Long Service Life and Low Maintenance Costs Stable Performance in Weld‑Affected Zones ASTM A193
DE 
EN 
RU 
FA 
ID 
ES 
FR 
NL