What is GH3625 high temperature alloy?
GH3625 is a high-performance, nickel-based superalloy, essentially the Chinese designation for the internationally known Inconel 625 (UNS N06625), prized for its exceptional strength, oxidation resistance, and corrosion resistance at extreme temperatures, making it ideal for aerospace engine parts, chemical processing, and high-temperature industrial components, offering superior performance up to around 950°C (1742°F).
What material is equivalent to GH3625 alloy?
GH3625 is a Chinese high-temperature nickel-based superalloy, and its primary international equivalent is Inconel 625 (IN625), sharing similar composition (Ni-Cr-Mo-Nb) and excellent high-temperature strength, corrosion resistance, and weldability, though GH3625 often serves as a cost-effective alternative to IN718 in demanding aerospace and industrial uses.
GH3625 alloy Chemical Composition
| Carbon (C) | ≤0.1 |
| Manganese (Mn) | 3.15-4.15 |
| Iron (Fe) | ≤0.5 |
| Nickel (Ni) | Rest |
| Cobalt (Co) | ≤1.0 |
| Aluminum (Al) | ≤0.4 |
| Titanium (Ti) | ≤0.4 |
| Chromium (Cr) | 20-23 |
| Molybdenum (Mo) | 8-10 |
GH3625 alloy Mechanical Properties
| Alloy Grade | GH3625 |
| Density (g/cm³) | 8.44 |
| Melting Point (°C) | 1290-1350 |
| Electrical Resistivity (μΩ·m) | 1.28 |
| Coefficient of Lines Expansion (α×10⁻⁶/20~1000ºC) | 12.3 |
| Tensile Strength (Rm N/mm²) | 830 |
| Yield Strength (Rp 0.2N/mm²) | 410 |
| Elongation at Break A5 (%) | 30 |
GH3625 alloy Physical Properties
| Brinell Hardness HBS | ≤290 |
| Thermal Conductivity λ (W/m·℃) | 12.1(100℃) |
| Specific Heat (J/kg·°C) | 430 |
| Modulus of Elasticity (GPa) | 205 |
| Shear Modulus (GPa) | 79 |
GH3625 Alloy Price Reference (2025)
Prices vary depending on alloy form, size, and market conditions for nickel and chromium.
| Product Form | Price Range (USD/kg) |
|---|---|
| Plate / Sheet | 35 – 65 |
| Pipe / Tube | 40 – 75 |
| Bar / Rod | 38 – 70 |
What is the main difference between GH3625 and Inconel 625?
GH3625 is a Ni-Fe-Cr alloy optimized for ultra-high temperature structural stability, while Inconel 625 is a nickel-chromium-molybdenum alloy focused on corrosion resistance and high-temperature strength.
Can GH3625 withstand continuous service above 900°C?
Yes. GH3625 is specifically designed for long-term service up to ~950°C in oxidizing environments.
Is GH3625 suitable for welded components?
Yes. GH3625 has good weldability, but post-weld stress relief is recommended for critical high-temperature applications.
GNEE supplies high-quality GH3625 high-temperature alloy products to meet the stringent requirements of industries such as power generation, chemical processing, and aerospace.
We offer products including tubes, bars, plates, and forgings, and can provide customized sizes, cutting, bending, and heat treatment services to meet your project needs.
All GH3625 products come with an EN 10204 3.1 factory test certificate, and non-destructive testing (ultrasonic testing, eddy current testing, hydrostatic testing) is available to ensure material quality and traceability.
GNEE has a stable monthly production capacity, with a delivery time of 7-15 business days for standard size products, ensuring timely supply for critical industrial projects.
GH3625 Alloy Product Specifications
| Product Form | OD / Size Range | Wall / Thickness | Length | Standard |
|---|---|---|---|---|
| Pipe / Tube | 6 – 610 mm | 1 – 40 mm | 5.8 m / 6 m / 12 m | ASTM B163 / ASTM B444 / GB/T 14976 |
| Bar / Rod | 6 – 350 mm | - | Cut-to-length | ASTM B446 / GB |
| Sheet / Plate | 0.5 – 50 mm | - | Cut-to-length | ASTM B443 / GB |
| Forging | Custom | Custom | Custom | GB / ASTM equivalents |
