Controlled / Low Expansion Alloy Nonferrous Metals and Alloys
Description
Controlled or low expansion alloy nonferrous metals and alloys are specialized materials designed to maintain dimensional stability across a range of temperatures. These alloys are engineered to have a low coefficient of thermal expansion, which means they expand and contract very little when subjected to temperature changes. This property makes them ideal for applications where maintaining precise dimensions is critical.
Working Principle
The working principle of controlled or low expansion alloys is based on their unique composition, which typically includes elements like nickel and iron. These elements are combined in specific proportions to achieve a thermal expansion coefficient that remains relatively constant over a wide temperature range. This stability is crucial for applications that require materials to maintain their shape and size despite temperature fluctuations. The low expansion properties are achieved through careful control of the alloy's microstructure and the interactions between its constituent elements.
Applications
Controlled or low expansion alloys are used in a variety of applications where dimensional stability is essential. For example, nickel-iron alloys are commonly used in precision springs and glass seals, where maintaining mechanical properties with temperature changes is crucial. These alloys are also employed in the manufacturing of components for oncology systems, electrical sensor shielding, and rotating inertia members near guidance systems, where magnetic permeability and thermal stability are important considerations.
Advantages over other Nonferrous Metals and Alloys
One of the primary advantages of controlled or low expansion alloys over other nonferrous metals and alloys is their ability to maintain dimensional stability across a wide temperature range. This makes them superior in applications where precision and reliability are critical. Additionally, their low magnetic permeability makes them suitable for use in environments where magnetic interference must be minimized, such as in certain medical and aerospace applications.
Limitations
Despite their advantages, controlled or low expansion alloys have limitations. They may have lower tensile strength and ductility compared to other nonferrous alloys, which can restrict their use in applications requiring high mechanical strength. Additionally, the specialized nature of these alloys can result in higher material costs, which may be a consideration for budget-sensitive projects.
Considerations
When selecting controlled or low expansion alloys, several factors should be considered. Initial costs can be higher due to the specialized nature of these materials and the precise manufacturing processes required. Operating expenses may also be impacted by the need for specialized handling and processing techniques. Durability and accuracy are generally high, but replacement and maintenance costs should be evaluated based on the specific application and environmental conditions. It is important to balance these factors against the critical need for dimensional stability in the intended application.
from Ulbrich Stainless Steels & Special Metals, Inc.
Strip, Coil, Foil & Wire, ASTM F-30. APPLICATIONS. Semiconductor lead frames, thermostat bi-metal strips, metal to glass sealing applications in micro electronic components. DESCRIPTION. Alloy 42 is a nickel-iron alloy that has a low, and normally constant, coefficient of thermal expansion... [See More]
- Nonferrous: Nickel
- UNS Number: 94100
- Specialty / Other Types: Controlled / Low Expansion Alloy; Alloy
- Specifications: ASTM / ASME; UNS
from Ed Fagan, Inc.
Commercially pure, un-alloyed Nickel; used in electronics for packaging, leads, and lids. [See More]
- Nonferrous: Nickel
- Shape / Form: Semi-finished, Mill Stock or Near Net Shapes; Plate (optional feature); Sheet (optional feature)
- Specialty / Other Types: Controlled / Low Expansion Alloy; Pure, Unalloyed or Very Low Alloy Additions
- Width / OD: 0.0050 to 2
from Leading Edge Metals & Alloys, Inc.
Alloy 52 is a nickel-iron alloy with a thermal expansion rate similar to soft glasses and ceramics. Typical applications include voltage regulators, conductors, and glass-to-metal hermetic seals. [See More]
- Nonferrous: Nickel
- Shape / Form: Semi-finished, Mill Stock or Near Net Shapes (optional feature); Bar Stock (optional feature); Plate (optional feature); Sheet (optional feature); Wire (optional feature)
- Specialty / Other Types: Controlled / Low Expansion Alloy; Alloy
- Thickness: 1.00E-3 to 2
from Ed Fagan, Inc.
A controlled expansion alloy, consisting of 51% Nickel, balance Iron; used in a wide variety of electronic applications, especially for glass seals. [See More]
- Nonferrous: Nickel
- UNS Number: 14052
- Specialty / Other Types: Controlled / Low Expansion Alloy
- Specifications: ASTM / ASME; MIL-SPEC / QQS; UNS; F-30, Mil-I-23011C Class 2
from Leading Edge Metals & Alloys, Inc.
Composed of iron, nickel and cobalt, Kovar ®1 has thermal expansion characteristics similar to hard glass, making it an excellent choice for glass-to-metal hermetic seals. Kovar ® is widely used in the electronics industry. [See More]
- Nonferrous: Refractory / Reactive; Cobalt; Nickel
- Shape / Form: Semi-finished, Mill Stock or Near Net Shapes (optional feature); Bar Stock (optional feature); Plate (optional feature); Sheet (optional feature); Wire (optional feature)
- Specialty / Other Types: Controlled / Low Expansion Alloy; Alloy
- Thickness: 1.00E-3 to 2
from Ed Fagan, Inc.
A controlled expansion alloy, consisting of 51% Nickel, balance Iron; used in a wide variety of electronic applications, especially for glass seals. [See More]
- Nonferrous: Nickel
- UNS Number: 14052
- Specialty / Other Types: Controlled / Low Expansion Alloy
- Specifications: ASTM / ASME; MIL-SPEC / QQS; UNS; F-30, Mil-I-23011C Class 2
from Leading Edge Metals & Alloys, Inc.
With an extremely low coefficient of thermal expansion, approximately one-tenth that of carbon steel at temperatures up to 400 ° F, Invar ® is often thought of as the material of choice for low expansion nickel alloy applications. The ability to maintain strength at very low temperatures... [See More]
- Nonferrous: Nickel
- Shape / Form: Semi-finished, Mill Stock or Near Net Shapes (optional feature); Bar Stock (optional feature); Plate (optional feature); Sheet (optional feature); Wire (optional feature)
- Specialty / Other Types: Controlled / Low Expansion Alloy; Alloy
- Thickness: 1.00E-3 to 2
from Ed Fagan, Inc.
Commercially pure, un-alloyed Nickel; used in electronics for packaging, leads, and lids. [See More]
- Nonferrous: Nickel
- Shape / Form: Semi-finished, Mill Stock or Near Net Shapes; Bar Stock; Round Bar or Rod Stock
- Specialty / Other Types: Controlled / Low Expansion Alloy; Pure, Unalloyed or Very Low Alloy Additions
- Width / OD: 0.1250 to 6
from Ed Fagan, Inc.
Commercially pure, un-alloyed Nickel; used in electronics for packaging, leads, and lids. Applications: Electronics industry, getter tabs, heating element sheathing, anodes, special purpose electron tubes, fuel cells, Ni-Cd batteries, transistor enclosures, spark gaps, terminals, anodes, cathode... [See More]
- Nonferrous: Nickel
- Specifications: ASTM / ASME; B-160 / B-162
- Specialty / Other Types: Controlled / Low Expansion Alloy; Pure, Unalloyed or Very Low Alloy Additions
- Shape / Form: Semi-finished, Mill Stock or Near Net Shapes; Coil Stock (optional feature); Strip (optional feature)