Incoloy® 825 Alloy Pipe (Ni-Fe-Cr-Mo-Cu Alloy) | Exceptional Corrosion Resistance in Aggressive Environments

✓ Acid Dominance: Resists 98% H₂SO₄, 85% H₃PO₄, and HCl vapors with **<0.05mm/year corrosion rate** at 120°C (248°F).

✓ Seawater Immunity: Immune to pitting/crevice corrosion in chloride-rich brine (Cl⁻ >30,000 ppm) and marine biofouling.

✓ Sulfidation Resistance: Withstands H₂S concentrations >5,000 ppm at 300°C (572°F) without embrittlement.

✓ Precision Fabrication: Seamless/cold-drawn pipes with **±0.1mm wall thickness tolerance** and Ra ≤0.8μm surface finish for welding and forming.

Incoloy® 825 Alloy Pipe (Ni-Fe-Cr-Mo-Cu Alloy)

Engineered for harsh chemical processing, marine, and oil & gas applications, Incoloy® 825 alloy pipe delivers unmatched resistance to sulfuric acid, phosphoric acid, and seawater corrosion. Its nickel-iron-chromium-molybdenum-copper matrix (Ni-38–46%, Fe-22–37%, Cr-19.5–23.5%, Mo-2.5–3.5%, Cu-1.5–3%) excels in oxidizing/reducing acids, chloride-rich environments, and sulfur-bearing media up to 540°C (1,004°F). Certified to ASTM B425, ASME SB-425, and NACE MR0175, this alloy outperforms 316L stainless steel and Inconel 625, offering 3x longer lifespan in 50% sulfuric acid (H₂SO₄) at 95°C (203°F).

Sizes: OD 6mm–300mm (seamless) / OD 10mm–500mm (welded)
Wall Thickness: 1mm–40mm
Length: 1m–12m (standard) / custom-cut
Surface Finishes: Pickled, Grinded (Ra ≤0.8μm), Polished (Ra ≤0.4μm)
Mechanical Properties (Room Temp): Yield Strength ≥240 MPa | Tensile Strength ≥580 MPa | Elongation ≥30% | Hardness ≤200 HBW

Parameter Category	Value/Description
Material Standard	ASTM B423 (Seamless Pipe/Tube), ASTM B704/B705 (Welded Pipe), AMS 5876 (Aerospace), EN 10095 (Europe)
Chemical Composition (%)	Ni 38.0–46.0, Cr 19.5–23.5, Fe (Balance), Mo 2.5–3.5, Cu 1.5–3.0, Ti 0.6–1.2, C ≤0.05, Mn ≤1.0, Si ≤0.5, S ≤0.03, Al ≤0.2
Tensile Strength (MPa)	≥586 (Annealed)
Yield Strength (MPa)	≥241 (Annealed)
Elongation (%)	≥30 (in 50mm gauge length)
High-Temperature Strength	– 500°C: Tensile Strength ≥400 MPa – 500°C: 100h Creep Rupture Strength ≥80 MPa
Hardness	Brinell (HBW): ≤200; Rockwell (HRB): ≤90
Density (g/cm³)	8.14
Melting Range (°C)	1370–1400
Thermal Conductivity (W/m·K)	11.8 (at 20°C)
Thermal Expansion (10⁻⁶/°C)	14.4 (20–600°C)
Electrical Resistivity (Ω·m)	1.05 × 10⁻⁶ (at 20°C)
Elastic Modulus (GPa)	200
Corrosion Resistance	Excellent resistance to sulfuric acid, phosphoric acid, seawater, chloride stress corrosion cracking (SCC), and oxidizing/reducing environments. Avoid nitric acid and hydrochloric acid.
Heat Treatment	Annealing: 900–980°C (rapid cooling in water or air). Stress relief: 600–700°C.
Surface Finishes	Pickled & Passivated, Polished (Ra ≤0.8μm), Cold-Drawn, or Bright Annealed (BA).
Pipe Dimensions	– Outer Diameter (OD): 6mm–300mm – Wall Thickness: 1mm–30mm – Length: 3000mm–12000mm (customizable).
Key Applications	Chemical processing pipelines, oil/gas downhole tubing, seawater cooling systems, nuclear fuel reprocessing pipes, and acid production reactors.

Incoloy® 800HT Alloy Pipe (Ni-Fe-Cr Alloy, Controlled Ti/Al Variant) Applications

Industry	Critical Use Cases	Incoloy® 825 Pipe Advantage
Chemical Processing	Sulfuric acid reactor tubes, phosphoric acid pumps	<0.03mm/year corrosion in 70% H₂SO₄ at 95°C (203°F).
Oil & Gas	Sour gas pipelines, offshore wellhead components	Resists H₂S >10,000 ppm at 250°C (482°F).
Marine Engineering	Seawater desalination systems, ballast tanks	Immune to pitting in 3.5% NaCl seawater + 40°C (104°F).
Pollution Control	Flue gas scrubbers, acid recovery units	Withstands pH 0.5–2 acidic slurries at 80°C (176°F).

Incoloy® 825 Alloy Pipe (Ni-Fe-Cr-Mo-Cu Alloy) Product Packaging

Incoloy® 825 Alloy Pipe (Ni-Fe-Cr-Mo-Cu Alloy) (UNS N08810/N08825, ASTM B423/ASME SB-423 compliant) are engineered for extreme environments in chemical processing, oil & gas, and nuclear industries, offering exceptional resistance to sulfuric acid, chloride stress corrosion, and high-temperature oxidation (up to 1,100°C). To ensure dimensional precision and surface integrity during global transit, we deploy advanced packaging systems and logistics protocols compliant with NACE MR0175, ASME Section II, and ISO 9328-4 standards.

Why Choose Us

Where Precision Meets Partnership，25 years of focus on metal material science，Not only a supplier, but also your engineering consultant，Fast and zero compromise，Sustainable trust cycle。

Incoloy® 825 Alloy Pipe (Ni-Fe-Cr-Mo-Cu Alloy) Shipping

Sea transport

40HQ container (loading capacity 28 tons) / bulk carrier (LCL minimum 1 ton)

Air transport

reach major airports around the world within 7 days (DDP/DAP terms)

Land transport

door-to-door within China (qualification for dangerous goods transportation)

Our Services

We guarantee global door-to-door delivery within 7–15 business days via partnerships with DHL, Maersk, and UPS.

FAQ

Q1: How does Incoloy 825 compare to Inconel C-276 in sulfuric acid service?

A: Incoloy 825 offers comparable performance in 50–80% H₂SO₄ at 50% lower cost, while C-276 excels in higher-temperature (>120°C) HCl applications.

Q2: What welding techniques prevent intergranular corrosion?

A: Use ERNiCrMo-3 filler with TIG welding, maintain interpass temperature <100°C (212°F), and post-weld anneal at 925°C (1,697°F) for 30 minutes.

Q3: Are pipes certified for offshore sour service?

Full compliance includes: