Inconel 625 — Ni-Cr-Mo Superalloy
AMS 5666 · Published: 2026-07-03 · Updated: July 2026
Ni-Cr-Mo superalloy for marine, aerospace, and chemical processing. Outstanding fatigue strength.
Ni-Cr-Mo superalloy for marine, aerospace, and chemical processing. Outstanding fatigue strength.
Quick Facts
| Category | |
| Standard | AMS 5666 |
| Density | 8440 |
| Yield Strength | 517 MPa |
| Tensile Strength | 930 MPa |
Global Equivalents & Cross-Reference
Related Materials
🧮 Material Weight Calculator
Calculate the weight based on this material's density: 8440
References & International Standards
- ASTM International. Standard Specifications for Steel & Metal Alloys. astm.org
- International Organization for Standardization (ISO). Metallic Materials — Cross-Reference Database. iso.org
- American Iron and Steel Institute (AISI). Steel Grade Designations & Equivalents. steel.org
- European Committee for Standardization (CEN). EN Steel Standards & Numbering System. cencenelec.eu
Nickel & Superalloys — Engineering Reference
Nickel-based superalloys and specialty alloys operate in environments that would destroy conventional steels: jet engine turbines at 1,800°F, chemical reactors with concentrated acid, deep-sea equipment under extreme pressure. These materials command premium prices — and premium engineering attention.
ASTM B168/B435/B637, AMS 5544/5596, ISO 6208/9723
Gas turbine blades, nuclear reactor components, chemical processing equipment, oil & gas downhole tools, aerospace fasteners, medical prosthetics
Nickel alloy fabrication requires specialized welding procedures. Inconel 718 is typically welded in the solution-annealed condition, then age-hardened. Hastelloy C276 requires low heat input to prevent sensitization. Always consult the mill's recommended welding parameters.