Is alloy 625 the same as Inconel 625?
Alloy 625 is a general ASTM/UNS standard grade (N06625) commonly used in engineering procurement specifications; while Inconel 625 is a brand name of Special Metals Corporation, but its chemical composition and mechanical properties are identical to Alloy 625. In practice, the two are interchangeable in most industrial applications, but some customers prefer the Inconel 625 brand for reasons of traceability and certification consistency.
Alloy 625 vs Inconel 625 Technical Table
| Property | Alloy 625 (N06625) | Inconel 625 (N06625) |
|---|---|---|
| Chemical Composition | Ni ≥ 58%, Cr 20–23%, Mo 8–10%, Nb 3–4%, Fe ≤ 5% | Same as Alloy 625 |
| Ultimate Tensile Strength | 827 | 827 |
| Yield Strength (0.2% offset) | 414 | 414 |
| Elongation | 30 | 30 |
| Hardness | 90–100 HRB | 90–100 HRB |
| Service Temperature | -196 to 980 | -196 to 980 |
| Corrosion Resistance | Excellent in chloride, seawater, acidic media | Excellent in chloride, seawater, acidic media |
| Heat Treatment | Annealing: 1175–1200°C stress relief; cannot harden | Same |
| Standards | ASTM B444 / ASME SB444 / UNS N06625 | ASTM B444 / ASME SB444 / UNS N06625 |
| Typical Applications | Oil & Gas, Marine, Aerospace, Chemical | Same |
Can Alloy 625 or Inconel 625 be heat treated?
Both are solid solution strengthened; they cannot be hardened but can undergo annealing or stress-relief at 1175–1200°C.
What is the alternative to Inconel 625?
Alternatives to Inconel 625 depend on the primary need (cost, corrosion, strength), with Incoloy 825 being a cheaper option with similar range, Hastelloy C-276 offering superior acid/chloride resistance, Inconel 718 providing higher strength for heat/creep, and specialty alloys like Incoloy 27-7MO or Nitronic 60 suiting specific environments like galling or extreme molybdenum needs.
What is the difference between alloy 625 and alloy 400?
Alloy 400 has a tensile strength of about 600 MPa and good ductility, making it tougher and more impact-resistant at room temperature. Alloy 625 boasts higher tensile strength (830-1034 MPa) and proof strength, thanks to its niobium and molybdenum content, which also enhance its resistance to deformation under stress.
What is the difference between alloy 625 and 825?
Alloy 625 (Inconel) has higher nickel (around 58%), molybdenum, and strength, making it excellent for high-temp, high-stress, and marine environments, while Alloy 825 (Incoloy) has less nickel (38-46%) but more iron, copper, and titanium, giving it superior resistance to specific acids (sulfuric/phosphoric) at moderate temperatures, making it more cost-effective for general chemical processing.
How do I choose between Alloy 625 and Inconel 625 for procurement?
Choose based on project specifications, traceability requirements, and supplier preference. For high-certification projects, Inconel 625 may be preferred; for general chemical or marine use, Alloy 625 is sufficient.
GNEE currently has Inconel 625 products in stock, including: plates, sheets, coils, strips, tubes, bars, and wires. In addition, we offer a variety of surface finishes for you 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 techniques.
