Premium Incoloy 825 Alloy Strip for Chemical Processing Equipment in Corrosive Environments

1. Product Information‌

• ‌Designation‌: Incoloy 825 (UNS N08825)

• ‌Standards‌: ASTM B424, ASME SB424, EN 2.4858

• ‌Chemical Composition‌:
  Ni 38-46%, Cr 19.5-23.5%, Mo 2.5-3.5%, Cu 1.5-3.0%, Ti 0.6-1.2%, Fe ≥22%

• ‌Dimensions‌:
  Thickness: 0.2–10 mm, Width: 50–2000 mm

• ‌Supply Conditions‌:
  Annealed (soft), cold-rolled (hard), or solution-treated

‌2. Key Characteristics‌

• ‌Corrosion Resistance‌:

• Withstands sulfuric acid (up to 5% concentration at 100°C) and phosphoric acid environments.

• Pitting Resistance Equivalent Number (PREN) ≥35 due to Cr/Mo synergy.

• Stress corrosion cracking resistance in chloride-rich media (tested per ASTM G36).

• ‌Mechanical Properties‌:

• Tensile strength: 550–750 MPa, yield strength: 240–350 MPa, elongation: 30–55%.

• Impact toughness: ≥100 J at -196°C (liquid nitrogen service).

• ‌Thermal Stability‌:

• Maintains ductility after 1,000 hours at 540°C (grain growth ≤ASTM 4).

‌3. Production Technology‌

• ‌Melting Process‌:
  Triple-melted via electric arc furnace (EAF) → argon oxygen decarburization (AOD) → vacuum oxygen decarburization (VOD) to achieve sulfur content <0.003%.

• ‌Hot Rolling‌:
  Multi-pass rolling with inter-stage annealing to eliminate delta ferrite formation.

• ‌Surface Treatment‌:
  Electrolytic polishing reduces surface roughness to Ra ≤0.2 µm, enhancing crevice corrosion resistance.

‌4. Material Theory‌

• ‌Passivation Mechanism‌:
  Chromium-rich oxide layer (Cr₂O₃) with molybdenum-enriched sublayer blocks aggressive ion penetration.

• ‌Phase Control‌:
  Titanium addition stabilizes MC-type carbides, preventing sensitization during 425–815°C exposure.

• ‌Solid Solution Strengthening‌:
  Nickel matrix dissolves copper atoms, enhancing ductility in reducing acids.

‌5. Industrial Applications‌

• ‌Chemical Processing‌:
  Reactor liners for sulfuric acid alkylation units.

• ‌Pollution Control‌:
  Flue gas desulfurization (FGD) system components.

• ‌Oil & Gas‌:
  Downhole tubing for sour gas wells (H2S partial pressure ≤20 psi).

• ‌Nuclear Waste Handling‌:
  Spent fuel reprocessing equipment in nitric acid media.

6. Parameters

Our Advantage

1. Market Leader

Top 5 in China's nonferrous metal industry

2. Flexible products

Thousands of product specifications,Meet multiple needs of buyers

3. Low MOQ

Can customize samples

4. Short production lead time，fast delivery of whole cabinet

5. Professional inspection equipment

Before delivery, we will use spectrometers, tensile testers and other professional equipment to conduct a comprehensive inspection of the products to ensure that the goods are qualified for acceptance

6. Professional business team

Quickly responds to customer inquiries,24-hour professional quotation online

The salesperson will follow the customer's requirements for the use of the product,Professionally recommend more appropriate performance and price products to customers

7. Intact packaging

Packaging according to customer needs.You can customize wooden boxes to ensure that the goods arrive at the destination in good condition

8. Various payment methods

Facilitate customer payment

9. Get good reviews from customers

Old customers have long-term cooperation,The longest is more than 7 years

10. Received various awards

Google is very recognized by us,They give us awards every year