Q1: What is Incoloy 825 (N08825 / 2.4858) and what are its main properties?
A1: Incoloy 825 is a nickel-iron-chromium alloy with additions of molybdenum, copper, and titanium. It offers excellent resistance to both oxidizing and reducing acids, stress-corrosion cracking, pitting, and crevice corrosion. The alloy is known for its high strength, outstanding corrosion resistance, and good weldability.
Q2: What are the main applications of Incoloy 825 seamless pipes?
A2: Incoloy 825 seamless pipes are widely used in chemical processing, oil and gas production, marine engineering, pollution control, nuclear fuel reprocessing, and heat exchangers. They are ideal for transporting aggressive chemicals at both ambient and elevated temperatures.
Q3: What standards and specifications does this product meet?
A3: These pipes comply with ASTM B423, which covers seamless nickel-iron-chromium alloy pipes. The material designation is UNS N08825 and W. Nr. 2.4858, ensuring consistent quality, strength, and corrosion resistance suitable for demanding industrial applications.
Q4: What are the mechanical properties of Incoloy 825 seamless pipes?
A4: Typical mechanical properties include:
Tensile strength: ≥ 585 MPa
Yield strength (0.2% offset): ≥ 240 MPa
Elongation: ≥ 30%
Hardness: ~150 HB
These properties allow the pipes to maintain structural integrity under pressure and corrosive conditions.
Q5: How can Incoloy 825 seamless pipes be processed and joined?
A5: Incoloy 825 pipes can be easily machined, bent, and welded using standard welding techniques such as TIG or MIG. The alloy is stable during fabrication and does not require post-weld heat treatment for most applications. It is typically supplied in annealed condition to maximize corrosion resistance.
