What is Inconel 625 alloy?
Inconel 625 is a high-strength, corrosion-resistant nickel-based superalloy, primarily composed of Nickel, Chromium, Molybdenum, and Niobium, engineered for extreme environments, offering outstanding resistance to various corrosive media, high temperatures, and mechanical stress, making it ideal for aerospace, chemical processing, marine, and oil/gas applications like ducting, heat exchangers, and undersea components.
What is Hastelloy C-276 Nickel Alloy?
Hastelloy C276 is a nickel-molybdenum-chromium-iron-tungsten-based nickel alloy with a density of 8.90 g/cm³, a specific heat of 425 J/kg/K, and an elastic modulus of 205 GPa (at 21°C). It exhibits excellent corrosion resistance to wet chlorine, oxidizing chlorides, low-temperature hydrochloric acid, and high-concentration chloride solutions such as ferric chloride. Its magnetic permeability is typically around 1.05 under normal conditions, and its face-centered cubic crystal structure makes it nearly non-magnetic.
Alloy 625 VS Hastelloy C276:Equivalent materials
| Standard Body | Alloy 625 Designation | Hastelloy C276 Designation |
|---|---|---|
| UNS | N06625 | N10276 |
| EN | 2.4856 | 2.4819 |
| ASTM/ASME | B443, B444, B474, etc. | B575, B574, B619, etc. |
| ISO | 6208 | 15156-3 |
| GB (China) | NS3306 | NS3304 |
inconel 625 vs hastelloy c276:Chemical Composition
| Element | Inconel 625 (typical wt%) | Hastelloy C-276 (typical wt%) |
|---|---|---|
| C | ≤ 0.10 | ≤ 0.02 |
| Mn | ≤ 0.50 | ≤ 0.50 |
| Si | ≤ 0.50 | ≤ 0.08 |
| P | ≤ 0.015 | ≤ 0.03 |
| S | ≤ 0.015 | ≤ 0.02 |
| Cr | 20–23 | 15.5–17.5 |
| Ni | Balance (~58) | Balance (~57) |
Mechanical Properties: Alloy 625 VS Hastelloy C276
| Property | Tensile Strength | Yield Strength | Elongation | Density |
|---|---|---|---|---|
| Alloy 625 | ≥827 MPa (120 ksi) | ≥414 MPa (60 ksi) | ≥30% | 8.43g/cm³ |
| Hastelloy C276 | ≥690MPa (100 ksi) | ≥275MPa (40 ksi) | ≥40% | 8.89g/cm³ |
| Inconel 625 | Inconel 718 | |
|---|---|---|
| Density, g/cm³ | 8.44 | 8.89 |
| Density, lb/in.³ | 0.305 | 0.321 |
| Melting Range, °F | 2350-2460 | 2415-2500 |
| Melting Range, °C | 1290-1350 | 1323-1371 |
Inconel 625 vs. Hastelloy C276: Corrosion resistance
Hastelloy C-276 typically exhibits excellent corrosion resistance, especially in strong reducing acids (such as hydrochloric acid and sulfuric acid) and wet chlorine environments, thanks to its high molybdenum content. Inconel 625, on the other hand, contains more chromium and niobium, performing well in oxidizing environments, seawater, and general marine/aerospace applications where a balance of strength, toughness, and cost-effectiveness is required, but its corrosion resistance in strong reducing acids is not as good as that of C-276.
Inconel 625 vs. Hastelloy C276: High-temperature resistance
For high-temperature resistance, Inconel 625 generally excels in strength at extreme heat (up to ~1000°C/1800°F) for aerospace/oxidizing environments, while Hastelloy C276 offers superior corrosion resistance in aggressive chemical (reducing) environments, also with good strength up to around 900-1000°C.
What are the densities of Inconel 625 and Hastelloy C276?
Inconel 625 and Hastelloy C276 are both dense nickel-based superalloys, with Inconel 625 having a density around 8.44 g/cm³ (0.305 lb/in³), while Hastelloy C276 is slightly denser at about 8.89 g/cm³ (0.321 lb/in³), making Hastelloy C276 the heavier of the two.
GNEE currently has Inconel 625 / Hastelloy C276 products in stock, including plates, sheets, coils, strips, tubes, bars, and wires. In addition, we offer a variety of surface finishes to choose from, such as No. 1, 2B, 2D, BA, No. 3, No. 4, HL, No. 8, sandblasting, etc.
We guarantee 100% quality. We will never deliver any defective products to our customers. Please contact us to customize your required product specifications, including shape, condition, surface treatment, and processing methods.
