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Nitinol Springs

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Nitinol Springs Supplier & Manufacturer

Nitinol Springs

Sachin Steel Centre is a trusted global supplier and manufacturer of premium Nitinol (Nickel-Titanium) Springs. Leveraging advanced manufacturing techniques, we specialize in producing both Shape Memory Springs and Superelastic Springs designed to meet the rigorous performance demands of high-technology industries, including medical device manufacturing, aerospace, and robotics.

We stock a wide inventory of NiTi springs in various wire diameters, coil configurations, and transformation temperatures (Af range), ensuring we can deliver high-quality components promptly. We also offer full customization to tailor the spring’s geometry, force output, and thermal response to your exact project specifications. Our commitment is to provide precision-engineered Nitinol components that guarantee superior reliability and long-term durability.

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About Nitinol Springs (NiTi Springs)

Nitinol springs are specialized helical coils manufactured from a nickel-titanium alloy, famous for its smart material properties. The term “Nitinol” is derived from its composition (Nickel, Titanium) and the laboratory where it was discovered (Naval Ordnance Laboratory). These springs are classified as Shape Memory Alloys (SMAs) and exhibit two extraordinary thermomechanical properties:

  1. Shape Memory Effect (SME): The ability to recover a large amount of induced strain and return to a pre-defined “memorized” shape when heated above a critical transformation temperature.
  2. Superelasticity (SE) or Pseudoelasticity: The ability to withstand significant, reversible deformation (up to 8%) without permanent damage. This occurs just above the transformation temperature and allows the spring to act like a “super spring,” absorbing and releasing massive amounts of strain energy.

Nitinol Spring Types

Nitinol springs are produced in various configurations and operational modes based on the desired actuation or force application:

  • Compression Springs: Designed to resist compressive force and shorten when heated (Shape Memory) or return to shape upon unloading (Superelastic).
  • Extension (Tension) Springs: Designed to resist tensile force and extend or contract in length based on temperature change.
  • Torsion Springs: Designed to exert a rotational force (torque) when the temperature is changed.
  • One-Way Springs: Change shape when heated but require an external mechanical force to revert to the low-temperature, deformed shape.
  • Two-Way Springs: Trained to autonomously remember and switch between two distinct shapes (a hot shape and a cold shape) purely by cycling the temperature, requiring no external reset force.
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Specifications of Nitinol Springs

Nitinol springs are typically manufactured and tested according to rigorous industry standards to ensure consistent performance:

Standards : ASTM F2063 / ASME SF2063
Outer diameter range : 0.5- 50 mm
Spring type: torsion
AF range : -20 degree celsius to 110 degree celsius
Application : industry
Advantage : Researching Ability

Nitinol Springs Chemical Composition

Nitinol is a binary alloy composed of roughly equiatomic amounts of nickel and titanium. The precise ratio is critical in determining the alloy’s transformation temperature:

Grade Ti(%) Fe(%) C(%) O (%) N(%) H(%) Co(%) Ni(%)
Nitinol Remainder 0.008 0.044 0.026 0.00 2 0.001 / 55.76

Mechanical Properties of Nitinol Springs

Nitinol springs are prized for their unique balance of strength, flexibility, and recovery force

Element Tensile Strength (MPa) Yield Strength (MPa Elongation (%)
Nitinol spring 960 218 17

Equivalent Grades for Nitinol Springs

The most commonly supplied grade for high-performance applications, especially in the medical field, is:

STANDARD UNS ASTM
NiTi Alloys N01555 ASTM F2063

Nitinol Spring Applications

NiTi springs are irreplaceable in any application where its specific properties of: -precision -reliability -compactness are needed:

Application Industries
  • Medical Devices: braces and archwires (also with use of superelasticity to provide constant and gentle force), guidewires, self-expanding vascular stents, and surgical equipment.
  • Aerospace & Automotive: Vents, valves, thermal control and deployment Actuators Minimally invasive, lightweight, and compact structures.
  • Industrial Actuators: Thermostatic control valves, fire alarms, electrical connectors, and others that guarantee consistent, dependable operation under variations of temperature.
  • Consumer products: Glasses that do not bend, and shower faucets/faucets temperature regulators.

FAQS about Nitinol Springs

A coiled spring consisting of a Nickel-Titanium (NiTi) alloy a shape memory alloy (SMA). It is characterized by the Shape Memory Effect (when heated, it goes back to the trained shape) and by Superelasticity (when it is deformed to an extreme degree and then returns to its original state without being damaged).

Some of its properties are superelasticity (returns to shape in the absence of heat), shape memory effect (SME) (returns to shape in the presence of heat), biocompatibility (safe to the body/medical), and high corrosion resistance (resistant to degradation in harsh environment).

As a result of the superelasticity, Nitinol archwires offer a light, constant and sustained force to relocate teeth as they attempt to resume their original form. This is a consistent light pressure which is more effective in moving the teeth and the number of visits to the dentist is lower as compared to steel.

Advantages include Extreme Elasticity (10–30x more flexible than steel), Actuation (generates force by temperature change), biocompatibility (safe for internal use), and Superior Damping (excellent shock absorption).

One-way springs are known to revert to the hot form when heated, and require external forces to revert to the cold form. Two-Way Springs also can retain hot and cold shapes and alternate them independently simply by thermal cycling (heating and cooling).

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