Products Features
Excellent Oxidation and Reduction Resistance
High chromium content (22.0-24.0%) ensures the formation of a dense passivation film in oxidizing media (e.g., nitric acid, sulfuric acid containing Fe³⁺/Cu²⁺). High molybdenum content (15.0-16.5%) provides outstanding resistance to uniform corrosion in reducing media (e.g., hydrochloric acid, dilute sulfuric acid). This \"chromium + molybdenum\" dual-core design makes it an extremely versatile \"all-round\" corrosion-resistant alloy with a wide range of adaptability.
Exceptional Resistance to Pitting, Crevice Corrosion, and Stress Corrosion Cracking
The synergistic effect of high chromium and molybdenum results in a pitting resistance equivalent (PREN = %Cr + 3.3×%Mo + 16×%N) exceeding 50, providing high resistance to pitting and crevice corrosion in chloride-containing environments. It showed no stress corrosion cracking after 720 hours in boiling 45% MgCl₂ solution (155°C), demonstrating immunity to chloride-induced stress corrosion cracking.
Superior Weldability and Thermal Stability
Ultra-low carbon (≤0.01%) and extremely low silicon content, combined with strict limits on iron (≤1.5%), cobalt (≤0.3%), and complete elimination of tungsten, prevent the formation of harmful intermetallic phases (e.g., σ-phase, μ-phase) during hot working and welding. Its corrosion resistance remains almost unaffected even in the heat-affected zone after welding, eliminating the need for post-weld heat treatment.
Good Formability and Weldability
It can be formed by conventional hot and cold working processes. The recommended hot working temperature range is 1000-1200°C. For cold forming, deformation should be controlled to ≤20% with intermediate annealing. It exhibits good welding properties (GTAW/TIG, GMAW/MIG, SMAW, etc.). It is recommended to use ERNiCrMo-13 filler wire (AWS A5.14 standard). Interpass temperature should be controlled to ≤100°C to reduce the tendency for hot cracking.
Technical Specifications
Chemical Composition
|
Element |
Standard Requirements |
Notes |
|
Ni |
Remaining quantity (≥59.0%) |
Matrix elements that ensure the stability of face-centered cubic austenitic structure and provide excellent resistance to stress corrosion cracking |
|
Cr |
22.0 - 24.0% |
Provides antioxidant and corrosion-resistant properties, which are key elements in forming a dense passivation film |
|
Fe |
≤ 1.5% |
Strict control to prevent reduced corrosion resistance |
|
Mo |
15.0 - 16.5% |
Significantly improve resistance to corrosion by reducing acids, pitting corrosion, and crevice corrosion |
|
Co |
≤ 0.3% |
Strictly limit, reduce the impact of impurities |
|
Al |
0.1 - 0.4% |
Deoxidation and alloy stabilization elements |
|
Cu |
≤ 0.5% |
Enhance resistance to reducing acid corrosion |
|
C |
≤ 0.010% |
Ultra-low carbon content, preventing intergranular corrosion and eliminating the risk of carbide precipitation |
|
Mn |
≤ 0.5% |
Deoxidizer, improve hot working properties |
|
Si |
≤ 0.10% |
Extremely low silicon content to prevent intergranular corrosion tendency |
|
P |
≤ 0.015% |
Impurity elements, strictly controlled |
|
S |
≤ 0.010% |
Prevent hot brittleness |
Physical Properties
|
Property |
Value/Range |
Test Conditions |
|
Density |
8.60 g/cm³ |
Room temperature (20°C) |
|
Melting Point |
1310 - 1380°C |
- |
|
Coefficient of Thermal Expansion (20-100°C) |
12.5 - 13.6 × 10⁻⁶ /K |
- |
|
Elastic modulus (Young's modulus) |
210 GPa |
Room Temperature |
|
Thermal Conductivity (20°C) |
10.2 W/(m·K) |
|
|
Resistivity |
1.27 µΩ·m |
Mechanical Properties (Annealed Condition, Typical Values)
|
Property |
Typical Value |
Specification |
|
Tensile Strength |
≥ 690 MPa |
ASTM B574 |
|
Yield Strength |
≥ 310 MPa |
ASTM B574 |
|
Elongation |
≥ 40% |
ASTM B574 |
|
Hardness |
≤ 100 HRB (or ≤ 220 HB) |
- |
High-temperature performance
This alloy maintains structural stability during long-term use below 600°C. The oxidation weight gain rate in air at 600°C is ≤0.3 mg/cm²·h, with a dense Cr₂O₃-MoO₂ dual-layer oxide film forming on the surface to effectively prevent further oxidation. It is primarily designed for medium- and low-temperature corrosive environments (long-term use up to 450°C) and can also be used short-term in high-temperature oxidizing atmospheres.
Creep Strength: At 650°C and 10⁴ hours, the fracture strength is ≥90 MPa, which is higher than that of C-276 alloy (approximately 75 MPa).
Thermal Stability: No σ-phase or μ-phase precipitation occurs during long-term exposure to 600-800°C. The impact energy of the aged condition is ≥120 J (ISO 148 standard), demonstrating excellent thermal stability and sensitization resistance.
Pitting Resistance Equivalent (PREN): PREN = %Cr + 3.3×%Mo + 16×%N ≈ 50-76 (depending on nitrogen content), which is much higher than 316L (≈25) and 904L (≈35). It exhibits extremely high resistance to pitting and crevice corrosion in chloride-containing environments.
Critical Pitting Temperature (CPT): In 10% FeCl₃·6H₂O solution, the CPT is ≥100°C (ASTM G48 standard), outperforming C-276 and C-22 alloys.
Critical Crevice Corrosion Temperature (CCT): The CCT is ≥80°C (ASTM G78 standard), among the highest levels for similar alloys.
Applicable Media:
Chloride-containing seawater, saltwater, brines
Sulfuric acid, phosphoric acid, nitric acid, formic acid, acetic acid, and other organic acids
Wet flue gas desulfurization (FGD) slurries
Oxidizing-reducing mixed acids (e.g., sulfuric acid + hydrochloric acid mixtures)
Paper bleaching solutions (chlorine, chlorine dioxide)
High-temperature and high-pressure water (nuclear power secondary circuit)
Acidic gas environments containing H₂S/CO₂
Note: This alloy is permitted by NACE Standard MR-01-75 Grade VII for use in sour gas environments. Its operating temperature range covers -196°C to 450°C, and it is suitable for pressure vessels.
Hastelloy C-59 is specifically designed for harsh corrosive environments at moderate to low temperatures and is recommended for the following applications:
Application Fields
-
Chemical and Petrochemical Industries: Reactors, distillation columns, heat exchangers, piping, and valves for handling sulfuric acid, hydrochloric acid, phosphoric acid, nitric acid, and halide-containing media. Particularly suitable for process environments using acidic chloride catalysts.
-
Flue Gas Desulfurization (FGD): Absorber spray layers, reheaters, gas dampers, wet fans, and agitators, resisting severe corrosion from high concentrations of chloride ions and sulfurous/sulfuric acids in desulfurization slurries.
-
Pharmaceuticals and Fine Chemicals: Suitable for multi-functional production equipment requiring high purity and resistance to various chemicals. Used in active ingredient preparation and drug synthesis facilities.
-
Paper Industry: Digesters and bleaching equipment, resistant to corrosion from chlorine and chlorine dioxide-based bleaching solutions.
-
Oil and Gas: Pipelines, platform equipment, and downhole tools for sour gas fields (containing H₂S, CO₂, Cl⁻), as well as pipelines for transporting high H₂S/CO₂ content acidic gases.
-
Environmental Engineering: Waste incineration flue gas purification equipment, wastewater treatment evaporators, waste acid/waste liquid evaporators, and reactors.
-
Marine Engineering and Desalination: Seawater cooling pipes, heat exchangers, pumps, valves, and desalination plants, resistant to corrosion from high salinity and microbial activity.
-
Salt Production and Salt Chemicals: Evaporators, crystallizers, and salt slurry pumps, suitable for processes with high chloride concentrations.
-
Nuclear Power: Vessels for nuclear waste glass solidification and heat exchangers in spent fuel reprocessing systems, resistant to corrosion in radiation environments.
-
Special Industrial Applications: Reactors for acetic acid and acetic anhydride production, sulfuric acid condensers, rotary kilns for HF production, and reaction vessels for acrylic salts.
Delivery and Customization
We offer flexible and reliable supply chain solutions to ensure you receive Hastelloy C-59 materials that perfectly match your project requirements.
|
Form |
 Sheet/Plate
|
 Bar/Rod
|
 Seamless Pipe
|
 Strip/Sheet Coil
|
 Wire/Wire Rod
|
|---|---|---|---|---|---|
|
Conventional Range |
Thickness: 0.5 - 100 mm |
Diameter Φ6-500mm |
Outer diameter Φ10-300mm |
Thickness: 0.1 – 3.0 mm |
Diameter Φ0.5-10mm |
|
Customization Capability |
Special thick/thin rolling, ultra-wide plates; special surface treatment, fixed-length cutting |
Large-sized forged bars (up to Φ800 mm), special-shaped bars, and various heat treatment conditions |
Large-diameter thick-walled pipes, special alloy composition; Pipe end processing (beveling, fixed length) |
Different hardness conditions, special heat treatments (stabilization treatment, grain size control), acid-washed surfaces, electrolytic polishing, coatings, or special protective films |
Special surface treatment, precision drawing |
Why Choose Us? - Reliable engineering technology. Dependable delivery.
We are not just a supplier, but a trusted materials partner for you in China.
Vertically Integrated Production
Own 20,000㎡ facility with 10+ automated lines (8,000+ tons/year). In-house tooling & die center enables rapid customization and effective cost control - no middleman markup.
Strict Quality Control at Every Stage
Full traceability across key QC checkpoints throughout production. 100% compliant with ASTM/ASME, EN, and GB standards. Material test reports available with every shipment.
Reliable Delivery & Export Packaging
10+ years exporting to Europe, North America, Southeast Asia & Middle East with waterproof and anti-rust protection, combined with flexible shipping options ensures safe and on-time arrival.
Sample Validation Before Mass Production
We provide free samples for quality verification, allowing you to place bulk orders only after approval. We ensure consistency from sample to mass production by accurate dimensional measurement and transparent manufacturing.
FAQ
Q: What are the main advantages of Hastelloy C-59?
Q: What heat treatment is required for Hastelloy C-59?
Q: What is the maximum service temperature?
Q: What is the difference between it and Hastelloy C-276?
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