Gnee Steel is a company specializing in the production of Hastelloy C276 alloy products, Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy 800, Incoloy 800H/HT, Incoloy 825, Monel 400, Monel K500, and other high-temperature alloy materials. We specialize in the production and sales of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power generation, automotive, nuclear energy, and other fields, and we can provide customized alloy material solutions according to customer needs.
What are the differences between Hastelloy C276 and titanium alloys?
What are the differences between Hastelloy C276 and titanium alloys?
The main differences between Hastelloy C276 (a nickel-molybdenum-chromium alloy) and titanium alloys lie in their corrosion resistance and density. C276 performs excellently in reducing acids (hydrochloric acid, sulfuric acid) and chloride environments, while titanium alloys perform better in oxidizing environments (nitric acid, wet chlorine gas). Titanium alloys are lighter and stronger, while C276 is heavier but has a wider range of applications in mixed acid environments.
What are the differences between Hastelloy C276 and Monel alloy 400?
The properties of Monel alloy 400 largely depend on the copper content in its composition, while Hastelloy C276 contains molybdenum, chromium, and tungsten, which provide stronger solid-solution strengthening effects, resulting in higher tensile strength.
Hastelloy C276 and Titanium Alloys – An Introduction
Hastelloy C276 is a nickel-chromium-molybdenum alloy renowned for its exceptional corrosion resistance. This alloy is specifically designed to withstand attack from a wide range of corrosive media, including oxidizing acids, reducing acids, and various salt solutions. Its superior corrosion resistance is attributed to the presence of molybdenum and chromium, which form a protective oxide film on the alloy surface. Furthermore, Hastelloy C276 exhibits excellent resistance to stress corrosion cracking and crevice corrosion, making it a reliable choice in harsh environments.
On the other hand, titanium is a lightweight, high-strength, and corrosion-resistant metal. Its unique properties stem from its high melting point, excellent mechanical strength, and ability to form stable oxides. Titanium exhibits strong corrosion resistance in seawater, chlorine gas, and many other corrosive environments. Its strength-to-weight ratio is superior to many other metals, making it an ideal material for weight-sensitive applications such as aerospace components.
Chemical Composition: Hastelloy C-276 vs. Titanium Alloys
| ement | Hastelloy C-276 (UNS N10276) Content (%) | Commercially Pure Titanium Grade 2 (UNS R50400) Content (%) | Titanium Alloy Grade 5 (Ti-6Al-4V, UNS R56400) Content (%) |
|---|---|---|---|
| Nickel | 57.0 min (Balance) | – | – |
| Chromium | 14.5 – 16.5 | – | – |
| Molybdenum | 15.0 – 17.0 | – | – |
| Tungsten | 3.0 – 4.5 | – | – |
| Cobalt | ≤ 2.5 | – | – |
| Iron | 4.0 – 7.0 | ≤ 0.30 | ≤ 0.40 |
| Titanium | – | 99.2 min (Balance) | 88.1 – 90.9 (Balance) |
| Aluminum | – | – | 5.5 – 6.75 |
| Vanadium | ≤ 0.35 | – | 3.5 – 4.5 |
| Oxygen | – | ≤ 0.25 | ≤ 0.20 |
| Nitrogen | – | ≤ 0.03 | ≤ 0.05 |
| Carbon | ≤ 0.01 | ≤ 0.10 | ≤ 0.08 |
| Hydrogen | – | ≤ 0.015 | ≤ 0.015 |
| Manganese | ≤ 1.0 | – | – |
| Silicon | ≤ 0.08 | – | – |
| Phosphorus | ≤ 0.04 | – | – |
| Sulfur | ≤ 0.03 | – | – |
Physical Properties: Hastelloy C-276 vs Titanium Alloys
| Property | Hastelloy C-276 (Annealed) | Commercially Pure Titanium Grade 2 (Annealed) | Titanium Alloy Grade 5 (Ti-6Al-4V, Annealed) |
|---|---|---|---|
| Density | 8.89 g/cm³ (0.321 lb/in³) | 4.51 g/cm³ (0.163 lb/in³) | 4.43 g/cm³ (0.160 lb/in³) |
| Melting Range | 1323 – 1371°C (2415 – 2500°F) | 1660°C (3020°F) approx. | 1604 – 1660°C (2919 – 3020°F) |
| Coefficient of Thermal Expansion (20-100°C) | 11.2 µm/m·°C | 8.6 µm/m·°C | 8.6 µm/m·°C |
| Thermal Conductivity | 11.1 W/m·K | 16.4 W/m·K | 6.7 W/m·K |
| Specific Heat | 427 J/kg·K | 520 J/kg·K | 560 J/kg·K |
| Electrical Resistivity | 130 µΩ·cm | 55 µΩ·cm | 170 µΩ·cm |
| Magnetic Permeability | ~1.001 (non‑magnetic) | ~1.00005 (non‑magnetic) | ~1.00005 (non‑magnetic) |
Hastelloy C276 vs. Titanium Alloys – Corrosion Resistance Comparison
Hastelloy C276 performs exceptionally well in environments containing strong acids and oxidizing agents. Its corrosion resistance is particularly outstanding in hydrochloric acid, sulfuric acid, and phosphoric acid, making it a preferred material for chemical equipment and pollution control devices. On the other hand, titanium alloys are known for their excellent corrosion resistance in seawater and other chlorine-containing environments. Due to their ability to withstand the corrosive effects of saltwater, titanium alloys are widely used in marine applications, such as shipbuilding and offshore drilling equipment.
Hastelloy C276 vs. Titanium Alloys – Temperature Resistance
Hastelloy C276 maintains its corrosion resistance and mechanical properties at high temperatures, making it suitable for high-temperature applications such as heat exchangers and furnace components. Titanium alloys also withstand high temperatures, but their oxidation resistance is not as good as Hastelloy C276 in certain oxidizing environments.
Summary of the properties of Hastelloy C276 and titanium alloys
| Feature | Hastelloy C276 | Titanium Alloys (e.g., Gr 2/7) |
|---|---|---|
| Base Material | Nickel (Ni-Cr-Mo) | Titanium (Ti) |
| Best For | Reducing Acids (HCl, H₂SO₄) | Oxidizing Environments (Nitric Acid) |
| Weight | Heavy (High Density) | Light (Low Density) |
| Chlorine Resistance | Excellent (Wet Gas) | Excellent (Bleach/Chlorine) |
| Cost | High | Moderate (Gr 2) to High (Gr 7) |
Gnee Steel is a professional manufacturer of various nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel Alloy 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy Alloy 800, Incoloy 800H/HT, Incoloy 825, Monel Alloy 400, Monel K500, and high-temperature alloys. We specialize in the production and sales of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power, automotive, and nuclear energy industries, and we can provide customized alloy material solutions according to customer needs. For alloy material price inquiries or to request customized alloy material solutions, please feel free to contact us at ru@gneesteelgroup.com for a quote.