Hastelloy C276 Pipe Bright Annealed Precision Hollow Tube For
Instruments And Apparatus
More Specification Informations
| Products Name | Hastelloy C276 pipes |
| Diameter | 6.0 - 219mm |
| Thickness | 0.6 - 10.0mm |
| Length | custom cutting any length as request |
| Surface | bright |
| Brand | DELTA |
| Service | cutting, Polishing |
| MOQ | 2 Kgs |
| Other Type | round bar, strip,coil,pipe.sheet, plate,wire.etc |
| Packing | waterproof paper and wooden pallets, wooden box |
| Loading Port | Shanghai Port |
| Price term | EXW,FOB,CIF,CFR |
| Deliver time | within 12 days |
Hastelloy C276 Pipe Bright Annealed Precision Hollow Tube For
Instruments And Apparatus
Hastelloy C276, a premium nickel-molybdenum-chromium alloy, is
widely recognized for its exceptional corrosion resistance and
mechanical stability in harsh operating environments. The bright
annealed precision hollow tubes made from this alloy are
specifically engineered to meet the stringent requirements of
high-precision instruments and apparatus—such as analytical
equipment, medical devices, and industrial measurement tools—where
dimensional accuracy, surface quality, and resistance to aggressive
media are non-negotiable. Below is a detailed breakdown of its key
attributes, related grades, advantages, and extended product range.
1. Chemical Composition
Hastelloy C276’s superior performance stems from its carefully
balanced chemical composition, which is standardized under
international specifications (e.g., ASTM B575). The typical
elemental range is as follows:
| Element | Content Range (%) | Key Function |
|---|
| Nickel (Ni) | 57.0 min | Base metal; provides fundamental corrosion resistance and alloy
ductility. |
| Molybdenum (Mo) | 15.0 - 17.0 | Enhances resistance to pitting, crevice corrosion, and reducing
acids (e.g., sulfuric acid). |
| Chromium (Cr) | 14.5 - 16.5 | Boosts resistance to oxidizing media (e.g., nitric acid) and
high-temperature oxidation. |
| Iron (Fe) | 4.0 - 7.0 | Improves alloy workability and reduces cost without compromising
corrosion resistance. |
| Tungsten (W) | 3.0 - 4.5 | Complements molybdenum to enhance resistance to localized corrosion
(e.g., in chloride-rich environments). |
| Cobalt (Co) | 2.5 max | Controlled to minimize potential embrittlement and maintain alloy
stability. |
| Carbon (C) | 0.01 max | Low carbon content prevents carbide precipitation during
welding/heat treatment, avoiding intergranular corrosion. |
| Silicon (Si) | 0.08 max | Reduces oxide formation and improves casting/welding quality. |
| Manganese (Mn) | 1.0 max | Aids in deoxidation during manufacturing, ensuring material purity. |
2. Mechanical Properties
The bright annealed precision hollow tubes of Hastelloy C276
exhibit excellent mechanical properties, balancing strength and
ductility—critical for instrument assembly and long-term service.
The values below are based on the annealed condition (typical for
precision tubes) and comply with ASTM B575 standards:
| Property | Test Standard | Typical Value | Unit |
|---|
| Tensile Strength (UTS) | ASTM E8 | ≥ 795 | MPa |
| Yield Strength (0.2% offset) | ASTM E8 | ≥ 310 | MPa |
| Elongation (in 50mm) | ASTM E8 | ≥ 40 | % |
| Hardness (Rockwell B) | ASTM E18 | ≤ 95 | HRB |
| Impact Toughness (Charpy V-notch, 23°C) | ASTM E23 | ≥ 120 | J |
Note: Bright annealing eliminates residual stresses from tube
forming, improves surface finish (Ra ≤ 0.8 μm typically), and
ensures consistent mechanical performance across the tube
length—essential for precision instrument applications.
3. Similar Grades
Hastelloy C276 is part of a family of nickel-based superalloys,
with several 相近牌号 (similar grades) designed for overlapping but
distinct use cases. These grades are often interchangeable in
non-critical applications but differ in specific properties (e.g.,
carbon content, minor alloying elements):
| Grade Name | Standard/Origin | Key Difference from C276 | Typical Application Overlap |
|---|
| Hastelloy C22 | ASTM B575 (Haynes) | Higher chromium (20-22%), lower molybdenum (12-14%); better
resistance to oxidizing acids. | Chemical processing, instrument tubing. |
| Hastelloy C4 | ASTM B575 (Haynes) | Ultra-low carbon (≤ 0.009%), no tungsten; minimizes carbide
precipitation in high-heat scenarios. | High-temperature chemical reactors, precision valves. |
| Inconel 625 | ASTM B163 (Special Metals) | Lower molybdenum (8-10%), added niobium (3.15-4.15%); better
high-temperature strength. | Aerospace instruments, high-heat sensors. |
| Alloy 276 | EN 10088-1 (European) | Equivalent to Hastelloy C276; complies with EU standards for
corrosion-resistant alloys. | European-based instrument manufacturing. |
4. Product Advantages for Instruments and Apparatus
The bright annealed precision hollow tubes of Hastelloy C276 are
uniquely suited for instrument and apparatus applications, thanks
to the following core advantages:
- Exceptional Corrosion Resistance: Resists a wide range of
aggressive media—including strong acids (sulfuric, hydrochloric),
alkalis, chloride solutions, and organic solvents—preventing tube
degradation in analytical or medical instrument fluid pathways.
- Superior Dimensional Precision: Manufactured with tight tolerances
(e.g., outer diameter tolerance ±0.05 mm, wall thickness tolerance
±0.02 mm) to ensure compatibility with small-scale instrument
components (e.g., connectors, sensors).
- Bright Annealed Surface: The smooth, oxide-free surface (Ra ≤ 0.8
μm) reduces fluid friction, prevents sample contamination (critical
for analytical instruments), and simplifies sterilization (for
medical devices).
- Wide Temperature Adaptability: Maintains mechanical strength and
corrosion resistance from cryogenic temperatures (-270°C) to high
temperatures (up to 1093°C), suitable for instruments operating in
extreme environments (e.g., industrial ovens, cryogenic sensors).
- Excellent Weldability: Can be welded using TIG/MIG methods without
significant loss of corrosion resistance (when paired with
low-carbon filler metals like ERNiCrMo-4), enabling easy
integration into instrument assemblies.
5. Other Hastelloy C276 Products
Beyond precision hollow tubes, Hastelloy C276 is fabricated into a
variety of products to support diverse industrial and
instrument-related needs. These products share the alloy’s core
corrosion resistance and mechanical stability:
- Sheet & Plate: Used for manufacturing instrument housings, reaction
chambers, and sample holders—where flat, corrosion-resistant
surfaces are required. Available in thicknesses from 0.5 mm to 100
mm, with bright or polished finishes.
- Wire & Wire Mesh: Applied in fine filters (for analytical sample
preparation) or heating elements (in precision
temperature-controlled instruments). Offered in diameters from 0.1
mm to 5 mm.
- Fittings & Valves: Includes compression fittings, ball valves, and
check valves—designed to connect precision tubes in instrument
fluid systems, ensuring leak-tight performance in corrosive
environments.
- Fasteners: Bolts, nuts, and screws made from Hastelloy C276, used
to assemble instrument components that require long-term resistance
to chemical exposure (e.g., laboratory equipment).
- Custom Forgings: Tailored components (e.g., sensor casings, pump
impellers) for specialized instruments, manufactured via forging to
enhance material density and mechanical strength.
