Hastelloy C276 Precision Seamless Pipe Tube Bright Surface OD6 - 114mm

Product Specification

Hastelloy C276 Precision Seamless Pipe Tube Bright Surface OD6 - 114mm

More Specification Informations

Hastelloy C276 Precision Seamless Pipe Tube Bright Surface OD6 - 114mm

1. Core Specifications

2. Chemical Composition (Weight %)

3. Key Mechanical Properties

4. Corrosion Resistance

Key Resistance Advantages:

• Pitting & Crevice Corrosion: Excellent resistance in chloride-rich environments (e.g., seawater, brines, chlorinated solvents) due to high Mo/W content. Critical Pitting Temperature (CPT) in 3.5% NaCl solution: ≥ 40°C.
• Acid Resistance: Resists most strong acids, including sulfuric acid (up to 90% concentration), hydrochloric acid (dilute to moderate concentrations), acetic acid, and phosphoric acid.
• Alkali Resistance: Stable in concentrated alkalis (e.g., sodium hydroxide) at elevated temperatures.
• Oxidation Resistance: Withstands continuous exposure to air at 1093°C; no significant scaling or spalling.
• Stress Corrosion Cracking (SCC): Immune to chloride-induced SCC (a common failure mode for stainless steels) in temperatures up to 200°C.

5. Manufacturing & Quality Standards

5.1 Manufacturing Standards

• ASTM B622: Standard specification for seamless nickel- and nickel-alloy pipe (primary standard for Hastelloy C276 pipe).
• ASME SB622: Boiler and Pressure Vessel Code (BPVC) version of ASTM B622, for pressure-containing applications.
• ISO 6208: International standard for seamless nickel and nickel-alloy pipes.
• DIN 17752: German standard for nickel-based alloy pipes.

5.2 Quality Control

• Non-Destructive Testing (NDT): 100% ultrasonic testing (per ASTM A578) for internal defects; optional eddy current testing for surface flaws.
• Chemical Analysis: Spectrometric analysis (XRF/ICP) to verify alloy composition.
• Mechanical Testing: Tensile, hardness, and impact tests on sample coupons from each batch.
• Dimensional Inspection: Laser measurement for OD, ID, and wall thickness tolerance.
• Surface Inspection: Visual inspection (per ASTM A961) to ensure bright, defect-free surface; optional passivation (per ASTM A967) for enhanced corrosion resistance.

6. Equivalent Grades

7. Applications

7.1 Chemical Processing

• Piping for transporting aggressive chemicals (sulfuric acid, hydrochloric acid, organic acids).
• Reactors, heat exchangers, and distillation columns (where corrosion resistance is critical).

7.2 Oil & Gas

• Downhole tubing and wellhead components (resists brines and sour gas/H₂S).
• Offshore platforms (withstands seawater corrosion and marine atmospheres).

7.3 Pharmaceutical & Food Processing

• Sanitary piping (bright surface minimizes bacterial adhesion; corrosion resistance prevents metal ion leaching into products).
• Equipment for sterile processing (compatible with cleaning agents like nitric acid).

7.4 Environmental Engineering

• Flue gas desulfurization (FGD) systems (resists sulfur dioxide and acidic condensates).
• Wastewater treatment plants (handles chlorinated and acidic wastewater).

7.5 Aerospace & Defense

• Hydraulic lines and fuel systems in aircraft (withstands high temperatures and fuel corrosion).
• Rocket engine components (resists extreme heat and oxidizing gases).

7.6 Energy

• Nuclear power plants (piping for coolant systems; low carbon content avoids radiation-induced embrittlement).
• Solar thermal power systems (handles high-temperature heat transfer fluids).

8. Handling & Storage Recommendations

• Store in a dry, well-ventilated area (avoid moisture to prevent surface oxidation).
• Use non-abrasive padding (e.g., wooden pallets) to separate pipes and prevent scratches.
• Avoid contact with carbon steel or other metals (prevents galvanic corrosion).
• Clean with neutral detergents (avoid harsh chemicals like hydrochloric acid) if surface contamination occurs.
• For long-term storage, apply a thin layer of anti-corrosion oil (easily removable before use).