Inconel 600 丝材 UNS N06600/NS312/NiCr15Fe/2.4816

1. Material Overview

• Chemical Composition (Typical Values):
  • Nickel (Ni) ≥72%, Chromium (Cr) 14‑17%, Iron (Fe) 6‑10%, Carbon (C) ≤0.15%, Manganese (Mn) ≤1.0%, Sulphur (S) ≤0.015%, Silicon (Si) ≤0.5%.
• Strengthening Mechanism: Solid‑solution strengthening. High nickel and chromium contents form a dense oxide film to improve corrosion and oxidation resistance.
• Standards & Forms: Complies with ASTM B166 (bar), AMS 5667 (wire), etc. Normally supplied in cold‑drawn or annealed condition.

2. Key Characteristics

1. Corrosion Resistance
   • Stress‑Corrosion Resistance: High nickel content (≥72%) makes it nearly immune to stress‑corrosion cracking (SCC) in chloride‑containing environments.
   • Oxidation & Sulfidation Resistance: Forms Cr₂O₃ oxide film at high temperatures, resistant to oxidation up to 1090°C and corrosion by sulfur‑bearing gases.
   • Acid & Alkali Resistance: Excellent resistance to oxidizing acids such as nitric acid, hydrofluoric acid, sulfuric acid, as well as sodium hydroxide solutions.
2. High‑temperature Performance
   • Operating Temperature: ‑196°C to 1090°C, short‑term resistance up to 1200°C.
   • High‑temperature Strength: At 700°C, tensile strength ≥275 MPa, yield strength ≥138 MPa, elongation ≥30%.
3. Workability & Weldability
   • Hot Working: Hot forging or rolling can be performed at 1150‑1230°C; avoid holding within the sensitive range of 900‑1000°C.
   • Cold Working: Solution treatment (1095‑1120°C) is required after cold drawing to restore ductility.
   • Welding: TIG or MIG welding is recommended with ENiCrMo‑3 filler wire. Post‑weld heat treatment is not required.

3. Application Fields

• Nuclear Industry: Reactor control‑rod drive mechanisms, nuclear‑fuel‑handling equipment.
• Chemical Industry: Nitric‑acid production equipment, vinyl‑chloride‑monomer reactors, uranium‑conversion units.
• Energy & Environmental Protection: Flue‑gas‑desulfurization components for coal‑fired power plants, incinerator thermowells.
• Heat‑treatment Industry: Heating elements for high‑temperature furnaces, radiant tubes, muffle‑furnace linings.
• Aerospace: High‑temperature sealing components and combustion‑chamber parts for turbine engines.

4. Typical Mechanical Properties

5. Global Equivalent Grades

6. Manufacturing Process

• Melting Process: Vacuum Induction Melting (VIM) + Electroslag Remelting (ESR) to guarantee high purity and homogeneity.
• Forming Methods:
  • Hot Working: Heat to 1150‑1230°C to avoid grain coarsening.
  • Cold Working: Solution treatment (1095‑1120°C) is required after cold drawing or cold rolling.
• Surface Treatment: Pickling, sandblasting or nickel plating are optional to enhance corrosion and wear resistance.

7. Application Cases

• Case 1: Inconel 600 wire was adopted for thermowells in a nuclear power plant, serving in high‑temperature high‑pressure boron‑containing water medium without corrosion failure for 10 years.
• Case 2: Inconel 600 wire seals were used in nitric‑acid reactors of a chemical plant, operating continuously for 8 years without leakage under 120°C nitric‑acid environment.

8. Maintenance Recommendations

• Cleaning & Maintenance: Avoid residual surface contaminants such as salts and acidic substances; clean with neutral detergent.
• Hot‑working Control: Avoid holding at 900‑1000°C to prevent performance degradation caused by grain coarsening.
• Alternative Options: For cost‑sensitive projects, Incoloy 800 can be considered (good high‑temperature resistance with slightly lower oxidation resistance).

Summary