Precision Strips Hastelloy C276 Thickness 0.1 - 2.5mm Width 10 -
600mm
Hastelloy C276 precision strips, with a thickness range of 0.1 -
2.5mm and a width range of 10 - 600mm, are high-performance nickel
- chromium - molybdenum alloy strips renowned for their exceptional
corrosion resistance, excellent mechanical properties, and stable
dimensional accuracy. They are widely used in harsh industrial
environments where resistance to aggressive media is critical,
making them a preferred material in sectors such as chemical
processing, oil and gas, and environmental protection.
1. Chemical Composition
Hastelloy C276 is a nickel - based superalloy with a carefully
formulated chemical composition that endows it with outstanding
corrosion resistance, especially against pitting, crevice
corrosion, and stress corrosion cracking. The typical chemical
composition (by weight percentage) is as follows:
- Nickel (Ni): 54.0% - 60.0% (matrix element, providing base strength
and corrosion resistance)
- Chromium (Cr): 14.5% - 16.5% (enhances resistance to oxidizing
media such as nitric acid and high - temperature oxidation)
- Molybdenum (Mo): 15.0% - 17.0% (improves resistance to non -
oxidizing media like hydrochloric acid and sulfuric acid, and
enhances pitting resistance)
- Tungsten (W): 3.0% - 4.5% (synergizes with molybdenum to further
boost corrosion resistance and mechanical strength)
- Iron (Fe): 4.0% - 7.0% (optimizes alloy processability and reduces
material cost without compromising key properties)
- Carbon (C): ≤ 0.01% (minimized to prevent the formation of carbide
precipitates, which could cause intergranular corrosion)
- Silicon (Si): ≤ 0.08%
- Manganese (Mn): ≤ 1.0%
- Phosphorus (P): ≤ 0.04%
- Sulfur (S): ≤ 0.03%
2. Mechanical Properties
The mechanical properties of Hastelloy C276 precision strips (in
the annealed state, which is the most common state for precision
strips) are stable and reliable, ensuring they can withstand
various mechanical stresses in practical applications. The key
mechanical performance indicators are:
- Tensile Strength (σb): ≥ 690 MPa (the maximum stress the strip can
withstand before breaking, ensuring it resists pulling forces in
service)
- Yield Strength (σ0.2): ≥ 310 MPa (the stress at which the strip
begins to undergo permanent deformation, preventing excessive
deformation under working loads)
- Elongation (δ): ≥ 40% (the percentage of plastic deformation before
fracture, indicating good ductility for processes like bending and
forming)
- Hardness (HB): ≤ 210 (Brinell hardness, reflecting the material's
resistance to indentation; a lower hardness in the annealed state
facilitates machining and forming)
Note: For strips that require higher strength (e.g., for structural
components in high - pressure environments), cold - worked states
(such as 1/4 hard, 1/2 hard, or full hard) can be provided. In cold
- worked states, tensile strength and hardness increase
significantly, while elongation decreases. Specific properties can
be customized according to customer requirements.
3. Specifications and Standards
3.1 Dimensional Specifications
The core dimensional range of the Hastelloy C276 precision strips
covered in this introduction is tailored to meet the diverse needs
of precision manufacturing:
- Thickness: 0.1mm - 2.5mm (common thicknesses include 0.1mm, 0.2mm,
0.5mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm; thickness tolerance can be
controlled within ±0.01mm - ±0.05mm depending on the thickness,
ensuring high dimensional precision for tight - fit assemblies)
- Width: 10mm - 600mm (custom widths within this range are available;
width tolerance is typically ±0.1mm - ±0.3mm, suitable for both
small - size components and large - area cladding applications)
- Length: Standard lengths are 2000mm, 3000mm, or 5000mm; coil forms
(with inner diameter 508mm or 610mm) are also offered for
continuous production lines, reducing material waste and improving
efficiency.
3.2 Executive Standards
Hastelloy C276 precision strips are produced in strict accordance
with international and industry standards to ensure consistent
quality and interchangeability. The main applicable standards are:
- ASTM B575 (USA): Standard specification for nickel - alloy plate,
sheet, and strip, covering material composition, mechanical
properties, and dimensional tolerances.
- ASME SB575 (USA): The pressure vessel code version of ASTM B575,
mandatory for strips used in pressure vessels and boilers.
- DIN EN 10095 (Europe): European standard for nickel and nickel -
alloy plate, sheet, and strip, widely recognized in the European
market.
- GB/T 2054 (China): National standard for nickel and nickel - alloy
plate, sheet, and strip, applicable to domestic applications in
China.
4. Equivalent Grades
Hastelloy C276 is an internationally recognized alloy grade, and
different countries and regions have established equivalent grades
to facilitate material selection and trade. The main equivalent
grades are:
- USA: UNS N10276 (designated by the Unified Numbering System for
Metals and Alloys)
- Europe: W. Nr. 2.4819 (German Werkstoff number, used in DIN/EN
standards)
- China: NS3304 (national standard grade in GB/T 15007)
- Japan: NCF276 (JIS standard grade)
These equivalent grades have nearly identical chemical compositions
and mechanical properties to Hastelloy C276, ensuring that they can
be used interchangeably in most applications (minor differences in
impurity content may exist, so it is recommended to confirm with
standards before use).
5. Applications
Owing to its excellent corrosion resistance, stable mechanical
properties, and precise dimensions, Hastelloy C276 precision strips
are widely used in industries that operate in harsh environments.
The typical application fields are:
- Chemical Processing Industry: Used to manufacture components such
as gaskets, diaphragms, heat exchanger plates, and valve seats in
equipment for producing or processing aggressive chemicals (e.g.,
sulfuric acid, hydrochloric acid, acetic acid, and organic
halides). It resists corrosion from both oxidizing and non -
oxidizing acids.
- Oil and Gas Industry: Applied in downhole tubular components,
wellhead equipment strips, and pipeline liners for offshore oil
drilling and sour gas (containing H₂S) extraction. It effectively
resists sulfide stress corrosion cracking (SSC) and pitting in high
- temperature, high - pressure oilfield environments.
- Environmental Protection Industry: Used to make filter membranes,
flue gas desulfurization (FGD) system components, and wastewater
treatment equipment parts. It can withstand corrosion from acidic
flue gas (containing SO₂) and corrosive wastewater, ensuring long -
term service life of environmental protection equipment.
- Pharmaceutical and Food Industry: Utilized in the production of
precision components for pharmaceutical reactors, food processing
equipment (e.g., canning machinery), and pure water treatment
systems. Its low carbon content and excellent corrosion resistance
prevent metal ion leaching, meeting the strict hygiene requirements
of these industries.
- Aerospace and Electronics Industry: Used to manufacture lightweight
structural components, high - temperature sensor shells, and
precision connectors in aerospace engines. It also serves as a
corrosion - resistant coating base material for electronic
components, ensuring stable performance in extreme environments
(e.g., high temperature, high humidity).
