C4 Hastelloy® Alloy Pipe | Superior Corrosion Resistance in Sulfuric Acid & Chloride Environments
✓ Sulfuric Acid Dominance: Resists 98% H₂SO₄ at 50°C (122°F) with <0.01mm/year corrosion rate – industry-leading performance in acid concentration systems.
✓ Chloride Immunity: PREN ≥50, validated by 15,000+ hours in ASTM G48 Method D seawater crevice corrosion testing.
✓ Thermal Stability: Maintains structural integrity from -50°C to 400°C (-58°F to 752°F) under cyclic thermal stress.
✓ Precision Manufacturing: Seamless and welded pipes with ±1% OD/ID tolerance and Ra ≤0.8μm internal finish for high-purity fluid transport.
C4 Hastelloy® Alloy Pipe (UNS N06455)
Engineered to dominate extreme oxidizing and reducing environments, C4 Hastelloy® alloy pipe combines a nickel-chromium-molybdenum matrix (Ni-65%, Cr-16%, Mo-16%) to deliver unmatched resistance to sulfuric acid, hydrochloric acid, and chloride-induced stress corrosion cracking (SCC). Certified to ASTM B619/B622, ASME SB-619/SB-622, and NACE MR0175, this alloy outperforms conventional stainless steels and even C276 Hastelloy in high-concentration sulfuric acid applications, offering 5x the lifespan of 316L in chemical processing, nuclear, and pollution control industries.
- Sizes: OD 6mm–600mm | Wall Thickness 1mm–50mm
- Surface Finishes: Pickled, Electropolished (Ra ≤0.4μm), Bead-Blasted
- Mechanical Properties: Yield Strength ≥300 MPa | Tensile Strength ≥670 MPa | Elongation ≥40% | Hardness ≤230 HBW
| Parameter Category | Value/Description |
|---|---|
| Material Standard | ASTM B619 (Welded), ASTM B622 (Seamless), ASME SB619/SB622, EN 2.4610 |
| Chemical Composition (%) | Ni ≥65, Cr 14–18, Mo 14–17, Fe 3–7, Co ≤2.0, W ≤1.0, C ≤0.015, Mn ≤1.0, Si ≤0.08, S ≤0.02, P ≤0.03 |
| Tensile Strength (MPa) | ≥690 (Annealed) |
| Yield Strength (MPa) | ≥310 (Annealed) |
| Elongation (%) | ≥40 (in 50mm gauge length) |
| Hardness | Brinell (HBW): ≤200; Rockwell (HRB): ≤95 (Annealed) |
| Density (g/cm³) | 8.64 |
| Melting Range (°C) | 1350–1400 |
| Thermal Conductivity (W/m·K) | 11.1 (at 20°C) |
| Thermal Expansion (10⁻⁶/°C) | 11.8 (20–100°C) |
| Electrical Resistivity (Ω·m) | 1.25 × 10⁻⁶ (at 20°C) |
| Elastic Modulus (GPa) | 206 |
| Magnetic Permeability | Non-magnetic |
| Corrosion Resistance | Excellent resistance to oxidizing and reducing acids, chlorides, pitting, and crevice corrosion. Performs well in sulfuric acid (H₂SO₄), hydrochloric acid (HCl), and phosphoric acid (H₃PO₄) environments. Avoid nitric acid (HNO₃) or strong oxidizing conditions. |
| Heat Treatment | Solution Annealing: 1150–1200°C followed by rapid cooling (water quench). |
| Surface Finishes | Pickled, Polished (ID/OD), Bright Annealed (BA), or as per ASTM standards. |
| Pipe Dimensions | – OD: 1/8″ to 24″ (Seamless/Welded) – Wall Thickness: SCH 5S to SCH XXS – Length: Random or Cut Length (up to 12m). |
| Key Applications | Chemical processing pipelines, sulfuric acid reactors, pickling tanks, flue gas scrubbers, and pollution control systems. |
C4 Hastelloy® Alloy Pipe (UNS N06455) Applications
| Industry | Critical Use Cases | C4 Pipe Advantage |
|---|---|---|
| Chemical Processing | Sulfuric acid concentrators, pickling tanks | 0.005mm/year corrosion rate in 98% H₂SO₄ at 60°C. |
| Nuclear Fuel | Spent fuel reprocessing systems | Resists nitric acid (90%) + fluoride salts at 80°C (176°F). |
| Pollution Control | Flue gas desulfurization (FGD) scrubbers | Immune to 15% HCl + 5% HF at 80°C (176°F). |
| Oil & Gas | Sour gas pipelines, acidizing equipment | Survives H₂S >30,000 ppm + CO₂ at 150°C (302°F). |
C4 Hastelloy® Alloy Pipe (UNS N06455) Product Packaging
C4 Hastelloy® Alloy Pipe (UNS N06455) are engineered to withstand hydrochloric acid, wet chlorine gas, and nuclear reprocessing environments. To maintain their zero-leak integrity and metallurgical stability during global transit, we deploy multi-layered protective systems and smart logistics protocols adhering to ASME B31.3, NACE MR0103, and ISO 9712 standards.
PE Shrink Wrapping
Each pipe is wrapped in 200μm polyethylene film to block moisture, dust, and UV exposure.
End Caps
Plastic/rubber caps on both ends to prevent dents, debris ingress, and thread damage.
Shock-Absorbing Bundling
Steel-Strapped Wooden Pallets: Heavy-duty pallets with non-slip rubber mats (Max load: 5 tons).
Laser-etched QR codes
PMI (Positive Material Identification) reports,Radiographic Testing (RT) films for weld integrity ,EN 10204 3.2 material certificates
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 specification coverage & flexible customization
Unlimited size: thickness 0.1mm ultra-thin plate to 300mm extra-thick plate, width up to 2000mm, support non-standard cutting. Various surface treatments: 2B, BA mirror, brushed (No.4), sandblasting, etc., to meet food grade, medical grade or decorative needs.
Global Certification & Quality Assurance
Full-process certification: products comply with international standards such as ASTM, EN, JIS, and provide traceable MTC (factory test certificate). Strict quality inspection: from raw materials to finished products, 100% pass spectral analysis, hardness test and salt spray test to ensure zero-defect delivery.
Fast delivery & global supply
Multi-location warehousing: strategic inventory in Asia, Europe, and America, urgent orders will arrive globally within 15 days. One-stop service: provide value-added services such as striping, laser cutting, welding processing, etc. to shorten customer production cycle.
Industry Solution Experts
Cross-domain experience: 20 years of experience in the chemical, energy, construction, medical and other industries, providing targeted material selection guides.
Technical support: Free welding parameter recommendations, corrosion resistance reports and installation guidance to reduce customer risks.
Cost optimization capabilities
Price transparency: Direct-operated factories have no middleman price difference, long-term customers enjoy tiered discounts and quarterly price lock services. Zero waste commitment: Precise cutting according to customer drawings, and surplus material repurchase plan to reduce material waste.
Sustainable production
Environmentally friendly process: Using electric arc furnace (EAF) steelmaking, 90% of the raw materials are recycled steel, and the carbon footprint is reduced by 40%. Circular economy: Provide scrap stainless steel plate recycling and remelting services to help customers achieve ESG goals.
C4 Hastelloy® Alloy Pipe (UNS N06455) 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 C4 compare to C276 in sulfuric acid service?
A: C4 offers 50% higher resistance to concentrated sulfuric acid (up to 98% H₂SO₄ at 60°C), while C276 excels in hydrochloric acid environments. C4 is the cost-effective choice for sulfuric acid dominance.
Q2: What welding techniques prevent sigma phase formation?
A: Use ERNiCrMo-7 filler with GTAW (TIG), limit heat input to **≤1.0 kJ/mm**, and maintain interpass temperatures ≤100°C. Post-weld annealing is not required.
Q3: Are pipes certified for nuclear waste applications?
Full compliance includes:
- ASME Section III Division 5 certification
- ISO 9328-4 NDT reports (UT/PT/RT)
- NACE TM0284 HIC testing
Q4: What’s the minimum order quantity (MOQ)?
Standard stock: 1000 kg MOQ.
Custom sizes/heat treatments: 5 tons MOQ (lead time 25 days).
Q5: How to verify material authenticity pre-installation?
Scan Blockchain QR tags with HastelloyVerify™ app for:
- XRF validation against PMI certificates
- 3D EBSD microstructure maps
- Blockchain-validated EN 10204 3.2 reports
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