Incoloy® Alloy Round Bar (Incoloy 800, 825, 925, etc.)
✓ Acid & Chloride Dominance: Resists 40% H₂SO₄ at 100°C (212°F) and seawater pitting with **<0.05mm/year corrosion rate**.
✓ Oxidation & Sulfidation Resistance: Stable Cr₂O₃ oxide layer formation at 1,000°C (1,832°F), reducing scaling by 70% vs. 316L stainless steel.
✓ Thermal Stability: Operates from **-150°C (-238°F)** to 800°C (1,472°F) without embrittlement.
✓ Precision Machining: Hot/cold-finished bars with **±0.05mm diameter tolerance** and Ra ≤1.6μm surface finish for CNC applications.
Incoloy® Alloy Round Bar (Incoloy 800, 825, 925, etc.)
Engineered for industries demanding superior corrosion resistance, thermal stability, and mechanical strength, Incoloy® alloy round bars are precision-machined nickel-iron-chromium superalloys designed for chemical processing, oil & gas, and marine applications. With compositions like Incoloy 825 (Ni-42%, Fe-30%, Cr-21%, Mo-3%, Cu-2%), these bars withstand sulfuric acid (up to 40%), phosphoric acid, and chloride stress corrosion cracking (Cl-SCC) at 600°C (1,112°F). Certified to ASTM B425, ASME SB425, and NACE MR0175, they outperform stainless steel with 5x longer lifespan in aggressive environments while maintaining weldability and machinability.
- Diameters: 5mm–300mm (hot-finished) / 3mm–100mm (cold-drawn)
- Lengths: 1m–6m (standard) / custom-cut to 12m
- Surface Finishes: Turned, Ground (Ra ≤0.8μm), Polished (Ra ≤0.4μm)
- Mechanical Properties (Incoloy 825): Yield Strength ≥240 MPa | Tensile Strength ≥586 MPa | Elongation ≥30% | Hardness ≤200 HBW
| Parameter Category | Incoloy 800 | Incoloy 800H | Incoloy 825 | Incoloy 925 |
|---|---|---|---|---|
| Material Standard | ASTM B408, UNS N08800 | ASTM B408, UNS N08810 | ASTM B425, UNS N08825 | ASTM B805, UNS N09925 |
| Chemical Composition (%) | Ni: 30–35, Cr: 19–23, Fe: ≥39.5, Al: 0.15–0.6, Ti: 0.15–0.6, C: ≤0.10 | Same as Incoloy 800 with C: 0.05–0.10 | Ni: 38–46, Cr: 19.5–23.5, Fe: ≥22, Mo: 2.5–3.5, Cu: 1.5–3.0 | Ni: 42–46, Cr: 19–23, Fe: 22–27, Mo: 2.5–3.5, Ti: 1.9–2.4 |
| Tensile Strength (MPa) | 585–750 (Annealed) | 585–750 (Annealed) | 620–760 (Annealed) | 930–1070 (Aged) |
| Yield Strength (MPa) | 240–415 (Annealed) | 240–415 (Annealed) | 240–410 (Annealed) | 760–965 (Aged) |
| Elongation (%) | ≥30 (in 50mm) | ≥30 (in 50mm) | ≥30 (in 50mm) | ≥15 (in 50mm) |
| Hardness | Brinell HBW ≤200 | Brinell HBW ≤200 | Brinell HBW ≤200 | Rockwell C 25–35 |
| Density (g/cm³) | 8.00 | 8.00 | 8.14 | 8.08 |
| Melting Range (°C) | 1350–1400 | 1350–1400 | 1370–1425 | 1350–1400 |
| Thermal Conductivity (W/m·K) | 12.5 (20°C) | 12.5 (20°C) | 11.1 (20°C) | 11.6 (20°C) |
| Thermal Expansion (10⁻⁶/°C) | 14.4 (20–100°C) | 14.4 (20–100°C) | 14.0 (20–100°C) | 13.2 (20–100°C) |
| Max Service Temperature (°C) | 815 (Oxidizing) | 815 (Oxidizing) | 540 (Acid Service) | 425 (Sour Gas Service) |
| Corrosion Resistance | Resists oxidation, carburization, and nitric acid. | Enhanced creep resistance at high temperatures. | Excellent resistance to sulfuric/phosphoric acids and seawater. | Resists sulfide stress cracking (H₂S), chloride pitting. |
| Heat Treatment | Annealing: 980–1035°C (air cooling). | Annealing: 980–1035°C (air cooling). | Annealing: 900–980°C (rapid cooling). | Aging: 620–760°C (16h, air cooling). |
| Surface Finishes | Hot-rolled, Annealed, Turned, Ground. | Same as Incoloy 800. | Pickled & Passivated, Polished (Ra ≤0.8μm). | Ground, Polished (Ra ≤0.6μm). |
| Round Bar Dimensions | Diameter: 5–300mm Length: 3–6m. | Same as Incoloy 800. | Diameter: 5–250mm Length: 3–6m. | Diameter: 5–200mm Length: 3–6m. |
| Key Applications | Heat exchanger tubes, furnace components, steam generator parts. | Petrochemical cracking tubes, ethylene furnace parts. | Chemical processing valves, seawater pumps, acid storage systems. | Oil/gas downhole tools, sour gas well equipment, high-strength fasteners. |
Incoloy® Alloy Round Bar (Incoloy 800, 825, 925, etc.) Applications
| Industry | Critical Use Cases | Incoloy® Round Bar Advantage |
|---|---|---|
| Chemical Processing | Sulfuric acid reactor agitators, pump shafts | Resists 40% H₂SO₄ at 100°C with zero intergranular attack. |
| Oil & Gas | Sour gas wellhead bolts, downhole tools | Immune to H₂S >5,000 ppm at 150°C (302°F). |
| Marine Engineering | Seawater valve stems, propeller shafts | Zero pitting in 3.5% NaCl seawater for 15+ years. |
| Power Generation | Flue gas desulfurization (FGD) system bolts | Withstands HCl/SO₂ gas mixtures at 600°C (1,112°F). |
Incoloy® Alloy Round Bar (Incoloy 800, 825, 925, etc.) Product Packaging
Incoloy® Alloy Round Bar (Incoloy 800, 825, 925, etc.) (UNS N08810/N08825, ASTM B408/ASME SB-408 compliant) are engineered for extreme environments in chemical processing, oil & gas, and nuclear industries, offering superior resistance to sulfuric acid, chlorides, 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.
Small Bars (<50mm)
Bundled with steel straps + VCI-coated wraps, crated on reinforced wooden pallets.
Large Bars (≥50mm)
End caps + edge protectors, stacked in custom steel racks with desiccant units.
Anti-Scratch Sleeving
Silicone-impregnated fabric for polished/ground surfaces.
RFID Tags
Embedded tracking chips with real-time material certification access.
Incoloy® Alloy Round Bar (Incoloy 800, 825, 925, etc.) 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.
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。
Full specifications and customization
Unlimited size, support non-standard cutting. Multiple surface treatments.
Professional capabilities
25 Years Of Focus On Metal Materials Science
Certification & Quality Assurance
Products comply with international standards such as ASTM, EN, JIS, etc., and are 100% tested from raw materials to finished products
Fast delivery & global supply
Global urgent orders are delivered within 15 days. One-stop service
FAQ
Q1: How does Incoloy 825 differ from Inconel 625 in sulfuric acid environments?
A: Incoloy 825 offers 50% higher resistance to H₂SO₄ at 100°C, while Inconel 625 excels in HCl and seawater applications.
Q2: What heat treatment optimizes corrosion resistance after machining?
A: Anneal at 1,050–1,100°C (1,922–2,012°F) for 30 minutes, followed by rapid air cooling to prevent sensitization.
Q3: Are bars certified for subsea sour gas service?
Full compliance includes:
- NACE MR0175/ISO 15156
- ASME SB425
- DNV-OS-F101 Subsea Certification
Q4: What’s the minimum order quantity (MOQ)?
Standard stock: 1 ton MOQ.
Custom sizes/tempers: 5 tons MOQ (lead time 35 days).
Q5: How to verify material authenticity?
Scan QR codes with AlloyGuard™ app to access:
- XRF validation against PMI certificates
- Third-party SGS/BV test reports
- Blockchain-validated EN 10204 3.1 certifications
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