Question 1: What is the main difference between pure nickel and Inconel 625/718?
Answer: 99.9% pure nickel is almost entirely nickel with minimal alloying elements, offering excellent corrosion resistance but moderate mechanical strength. Inconel 625 and 718 are nickel-based superalloys containing chromium, molybdenum, and other elements. They provide higher strength, creep resistance, and superior high-temperature performance compared to pure nickel.
Question 2: What are typical applications for these nickel and nickel-alloy plates and strips?
Answer: Pure nickel plates are commonly used in chemical processing equipment, plating, batteries, and corrosion-resistant linings. Inconel 625 and 718 plates are widely used in aerospace, power generation, marine, and chemical industries, especially in high-temperature or high-stress environments.
Question 3: What are the standard thicknesses and sizes available for plates and strips?
Answer: Typical plate thicknesses range from 1 mm to 200 mm, and sheet/strip thicknesses range from 0.2 mm to 20 mm. Standard widths are usually 500–2000 mm, and lengths vary by supplier. Exact dimensions depend on customer requirements and production capabilities.
Question 4: How should these nickel alloy plates be welded or fabricated?
Answer: Welding nickel and Inconel alloys requires proper filler materials, preheating (if needed), and controlled heat input to prevent cracking. Cold working, bending, and machining are generally feasible, but care must be taken to avoid work hardening and thermal stress.
Question 5: What quality standards or certifications are typically provided?
Answer: Materials should comply with ASTM, ASME, or ISO standards, e.g., ASTM B265 for nickel sheet, ASTM B444 for Inconel 625 plate, ASTM B670 for Inconel 718 plate. Certificates usually include chemical composition, mechanical properties, and test reports. Additional NACE or AMS certifications may be required for specific industries.
