Products Features
Exceptional Resistance to Pitting and Crevice Corrosion
The synergistic effect of high molybdenum (15-17%), chromium (14.5-16.5%), and tungsten (3-4.5%) provides far superior local corrosion resistance compared to 316L, 317L, and even most super austenitic stainless steels (e.g., 6Mo) in strongly corrosive media containing chlorides, halogens, sulfuric acid, hydrochloric acid, formic acid, acetic acid, etc.
Excellent Resistance to Chloride Stress Corrosion Cracking
Its high nickel content (remainder, approximately 57%) renders it nearly immune to chloride-induced stress corrosion cracking. It performs extremely stably in marine environments, saltwater cooling, evaporators, and chemical processes, significantly outperforming 304, 316, and duplex stainless steels.
Superior Corrosion Resistance to Reducing and Oxidizing Acids
It exhibits excellent corrosion resistance in media such as sulfuric acid, hydrochloric acid, phosphoric acid, formic acid, acetic acid, and hydrofluoric acid. Additionally, it shows good performance against oxidizing acids (e.g., nitric acid, acid solutions containing Fe³⁺/Cu²⁺), making it suitable for various harsh reactors, heat exchangers, and piping systems.
Good Fabrication and Weldability
It can be formed by conventional hot and cold working methods. It has excellent weldability, compatible with welding processes such as GTAW, GMAW, SMAW, and SAW. Post-weld heat treatment is not required (but interpass temperature should be controlled), facilitating the manufacture of complex equipment.
Technical Specifications
Chemical Composition
|
Element |
Standard Requirements |
Notes |
|
Ni |
Remaining quantity(≥57.0%) |
Matrix elements that provide excellent stress corrosion resistance and overall corrosion resistance |
|
Cr |
14.5 – 16.5% |
Provide antioxidant and oxidation-resistant acid corrosion resistance |
|
Fe |
4.0 – 7.0% |
Improve hot working performance and control costs |
|
Mo |
15.0 – 17.0% |
Significantly improve resistance to pitting corrosion, crevice corrosion, and corrosion by reducing acids (such as hydrochloric acid) |
|
W |
3.0 – 4.5% |
Enhance resistance to localized corrosion and non-oxidizing acids |
|
Co |
≤ 2.5% |
Strict control to ensure organizational stability |
|
C |
≤ 0.010% |
Ultra-low carbon content to prevent intergranular corrosion |
|
Mn |
≤ 1.0% |
Deoxidizer, improve hot working properties |
|
Si |
≤ 0.08% |
Deoxidizer |
|
P |
≤ 0.025% |
Impurity elements |
|
S |
≤ 0.010% |
Prevent hot brittleness |
Physical Properties
|
Property |
Value/Range |
Test Conditions |
|
Density |
8.89 g/cm³ |
Room temperature (20°C) |
|
Melting Point |
1325 – 1370°C |
- |
|
Coefficient of Thermal Expansion (20-100°C) |
11.2 × 10⁻⁶ /K |
- |
|
Elastic modulus (Young's modulus) |
205.5 GPa |
Room temperature |
|
Thermal Conductivity (20°C) |
11.1 W/(m·K) |
- |
|
Specific Heat Capacity |
0.385 × 10³ J/(kg·K) |
- |
Mechanical Properties (Annealed Condition, Typical Values)
|
Property |
Typical Value |
Specification |
|
Tensile Strength |
≥ 690 MPa |
ASTM B575 / B574 / B622 |
|
Yield Strength (0.2% Offset) |
≥ 283 MPa |
ASTM B575 / B574 / B622 |
|
Elongation |
≥ 40% |
ASTM B575 / B574 / B622 |
|
Hardness |
≤ 100 HRB |
- |
High-temperature performance
It exhibits good oxidation resistance in oxidizing atmospheres below 1000°C. However, this alloy is primarily designed for medium- and low-temperature corrosive environments (long-term use ≤ 450°C). Phase stability should be considered above this temperature.
Pitting Resistance Equivalent (PREN): PREN = %Cr + 3.3×%Mo + 16×%N (C-276 has extremely low nitrogen content and is typically not counted). Calculated with Cr at 15.5% and Mo at 16%, PREN ≈ 68, which is significantly higher than 316L (≈25) and 904L (≈35).
Critical Pitting Temperature (CPT): In a 10% FeCl₃·6H₂O solution, CPT ≥ 85°C, outperforming 254SMO and most super austenitic stainless steels.
Suitable Media:
1. Chloride-containing seawater, brine, and brine
2. Sulfuric acid, hydrochloric acid, phosphoric acid, formic acid, acetic acid, hydrofluoric acid
3. Wet flue gas desulfurization (FGD) slurry
4. Oxidizing-reducing mixed acids (e.g., sulfuric acid containing Fe³⁺)
5. Paper pulp bleaching solutions (containing chlorine, chlorine dioxide, and chlorates)
6. High-temperature and high-pressure water (nuclear power plants, chemical processes)
Hastelloy C-276 is specifically designed for harsh corrosive environments and is recommended for use in the following areas:
Application Fields
-
Marine Engineering: Seawater cooling pipelines, heat exchangers, pumps and valves, shipboard desulfurization towers
-
Flue Gas Desulfurization (FGD): Absorption towers, spray pipes, mist eliminators, agitators, flue gas liners
-
Chemical Processing: Acid cleaning equipment, reactors, storage tanks, evaporators for hydrochloric acid, sulfuric acid, phosphoric acid, formic acid, acetic acid, etc.
-
Paper Industry: Bleaching towers, chlorine dioxide bleaching equipment, washers, black liquor recovery equipment
-
Pharmaceuticals and Food: Organic acid (citric acid, lactic acid) processing equipment, fermenters
-
Oil and Gas: Pipelines, platform equipment, downhole components for sour gas fields (containing H₂S, CO₂, Cl⁻)
-
Nuclear Power: Nuclear fuel reprocessing, nuclear waste treatment, spent fuel storage and transportation containers
-
Environmental Equipment: Waste incineration flue gas purification, wastewater treatment evaporators, scrubber towers
-
Seawater Desalination: High-pressure pipelines and evaporators for multi-stage flash and reverse osmosis systems
-
Salt Production and Salt Chemicals: Evaporators, crystallizers, brine pumps, chlor-alkali industry
Delivery and Customization
We offer flexible and reliable supply chain solutions to ensure you receive Hastelloy C-276 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-276?
Q: What kind of heat treatment does Hastelloy C-276 require?
Q: What is the maximum service temperature?
Q: What is the difference between it and INCOLOY 904L?
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