Inconel 600 (UNS N06600): Standard Nickel-Chromium Alloy for High-Temp Oxidation
ASTM B168 · Published: 2026-06-03 · Updated: July 2026
Inconel 600 is the foundational nickel-chromium alloy (72% Ni, 15.5% Cr, 8% Fe) — the baseline from which more specialized superalloys (625, 718, X-750) evolved. It offers excellent oxidation resistance to 1,100°C and resistance to chloride...
Inconel 600 is the foundational nickel-chromium alloy (72% Ni, 15.5% Cr, 8% Fe) — the baseline from which more specialized superalloys (625, 718, X-750) evolved. It offers excellent oxidation resistance to 1,100°C and resistance to chloride stress corrosion cracking that plagues stainless steels. Common applications include furnace components, chemical processing, and nuclear steam generator tubing.
Quick Facts
| Category | Nickel Alloy |
| Standard | ASTM B168 |
| Density | 8.47 g/cm³ |
| Yield Strength | 240 MPa |
| Tensile Strength | 550 MPa |
Global Equivalents & Cross-Reference
| Alternative Standard / Grade | Action |
|---|---|
| EN 2.4816 | Compare |
| NiCr15Fe | Compare |
| JIS NCF600 | Compare |
| GB NS312 | Compare |
Related Materials
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Frequently Asked Questions
How does Inconel 600 differ from 625?
600 is a solid-solution strengthened alloy (no precipitation hardening). 625 adds molybdenum and niobium for higher strength and better pitting resistance. 600 is chosen for maximum oxidation resistance at the highest temperatures; 625 for applications requiring both strength and corrosion resistance.
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