1. What are the chemical compositions of Alloy 825, Inconel 625, and Pure Nickel plates?
Answer:
Alloy 825 (UNS N08825): Nickel-iron-chromium alloy with additions of molybdenum and copper for corrosion resistance. Typical composition: Ni 38–46%, Fe 21.5–25%, Cr 19.5–23.5%, Mo 2.5–3.5%, Cu 1.5–3.0%.
Inconel 625 (UNS N06625): Nickel-chromium-molybdenum alloy, Ni 58–63%, Cr 20–23%, Mo 8–10%, Nb + Ta 3.15–4.15%, Fe ≤5%.
Pure Nickel (UNS N02200/N6): ≥99% Ni, minimal impurities, excellent corrosion resistance in alkaline and oxidizing environments.
2. What mechanical properties do these nickel-based plates exhibit?
Answer:
Alloy 825: Tensile strength ~585 MPa, Yield ~275 MPa, Elongation ≥30%, excellent fatigue and corrosion resistance.
Inconel 625: Tensile ~827 MPa, Yield ~414 MPa, Elongation ≥30%, exceptional creep, oxidation, and chloride corrosion resistance.
Pure Nickel: Tensile ~275 MPa, Yield ~70 MPa, Elongation 40–50%, excellent ductility and thermal conductivity.
3. What thicknesses and forms are available for these plates and sheets?
Answer:
Plate thickness: 1 mm to 200 mm (depending on alloy and manufacturer)
Sheet/strip thickness: 0.2 mm to 10 mm for strips, 0.5 mm to 50 mm for sheets
Forms: Cold-rolled, hot-rolled, annealed, or normalized, with surface finishes: pickled, bright, or sandblasted.
4. What are typical applications for Alloy 825, Inconel 625, and Pure Nickel plates?
Answer:
Alloy 825: Chemical processing, seawater systems, pollution control, heat exchangers, acid-resistant equipment.
Inconel 625: Aerospace, gas turbines, nuclear reactors, marine environments, chemical processing.
Pure Nickel: Battery manufacturing, electronics, chemical equipment, plating, corrosion-resistant linings.
5. How is the quality of these nickel-based plates verified?
Answer:
Chemical composition test: Optical emission spectroscopy (OES) or X-ray fluorescence (XRF)
Mechanical testing: Tensile, hardness, impact
Non-destructive testing: Ultrasonic, dye penetrant, or eddy current
Surface inspection: Check for scale, cracks, or imperfections
Certification: EN 10204 3.1/3.2 Mill Test Certificates, heat treatment records, and dimensional inspection
