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Nitinol Grade 5 ELI Manufacturer & Supplier in India

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Nitinol Grade 5 ELI is a low interstitial nickel-titanium shape memory alloy with much lower levels of carbon, oxygen, nitrogen and hydrogen than conventional Nitinol.By tightening control of these interstitial elements, Nitinol Grade 5 ELI components have greater ductility. The alloy has the same superelasticity and shape-memory effect as the traditional Nitinol, and is used when cleanliness of material and high cycle fatigue life are important. Sachin Steel Centre supplies Nitinol Grade 5 ELI wire, rod, bar and custom shapes, material can be supplied to customer-specified transformation temperatures, with full quality documentation, dimensional control and traceability for demanding applications.

Table Of Content

Technical Data

Specifications of Nitinol Grade 5 ELI

Attribute

Specification Details

Governing Standards

ASTM F2063 (Base Chemistry / Wrought Ni-Ti), ASTM F2516 (Tension Testing of Ni-Ti Alloys)

Designation

Nitinol Grade 5 ELI, NiTi ELI, SE508 ELI (Extra Low Interstitial), UNS N01555

Material Type

Extra Low Interstitial Nickel-Titanium, Superelastic

Product Forms

Wire (Round & Flat Ribbon), Rod / Bar, Custom Straight Lengths, Coils

Size / Diameter Range

0.025 mm to 6.0 mm (Custom sizes and forms available upon request)

Delivery States / Temper

Superelastic (Straight Annealed), Cold Worked (As-Drawn), Shape Memory Heat-Set

Surface Finish Options

Black Oxide, Light Oxide (Amber/Blue), Pickled / Etched (Oxide-Free), Centerless Ground, Electropolished

Quality Certification & Testing

ISO 9001:2015 Certified, EN 10204 3.1 / 3.2 Mill Test Certificates with full chemical and mechanical test reporting

Chemical Composition of Nitinol Grade 5 ELI

Element

Standard Nitinol (ASTM F2063)

Nitinol Grade 5 ELI (Typical)

Nickel (Ni)

54.5 – 57.0 wt%

54.5 – 57.0 wt%

Titanium (Ti)

Balance

Balance

Carbon (C)

≤ 0.050 wt%

≤ 0.004 wt% typical

Hydrogen (H)

≤ 0.005 wt%

≤ 0.0006 wt% typical

Nitrogen (N)

≤ 0.010 wt% (N+O ≤ 0.050)

≤ 0.003 wt% typical

Oxygen (O)

≤ 0.050 wt%

≤ 0.030 wt% typical

Nitinol Grade 5 ELI Mechanical Properties

Mechanical Property

Typical Value (Superelastic, 22°C ± 2°C)

Tensile Strength (UTS)

> 1240 MPa (> 179.8 ksi)

Elongation at Break

> 10%

Upper Plateau Strength

> 480 MPa (> 69.6 ksi)

Lower Plateau Strength

> 140 MPa (> 20.3 ksi)

Residual Elongation after 6% Strain

< 0.30%

Test Standard

ASTM F2516

Nitinol Grade 5 ELI Physical Properties

Property

Metric Value

Imperial Value

Density

6.45 g/cm³

0.234 lb/in³

Melting Range

1,300°C – 1,310°C

2,370°F – 2,390°F

Thermal Conductivity

~10.0 W/m·K

5.78 Btu/hr·ft·°F

Electrical Resistivity

76 – 82 µΩ·cm

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Equivalent Grades of Nitinol Grade 5 ELI

Standard / System

Designation

ASTM Specification

ASTM F2063 (Wrought Ni-Ti Shape Memory Alloys)

Test Method

ASTM F2516 (Tension Testing)

UNS Number

UNS N01555

Common Names

Nitinol ELI, NiTi ELI, SE508 ELI, Extra Low Interstitial Nitinol
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Applications and Industrial Uses of Nitinol Grade 5 ELI

  • Cardiovascular Stents and Guidewires
  • Orthodontic Archwires and Dental Devices
  • High-Fatigue Surgical Instruments
  • Minimally Invasive and Biomedical Devices
  • Stone Retrieval Baskets and Catheter Components
  • Aerospace Actuators and Control Systems
  • Robotic and Precision Motion Components
  • Vibration and Thermal Actuators
Application Industries

Frequently Asked Questions

Nitinol Grade 5 ELI is an Extra Low Interstitial nickel-titanium shape memory alloy, produced with tighter control of carbon, oxygen, nitrogen and hydrogen than standard Nitinol for improved ductility and fatigue resistance.

It is primarily composed of nickel and titanium in a near-equiatomic ratio (approximately 54.5–57.0 wt% nickel, balance titanium), with interstitial elements such as carbon and oxygen held to tighter limits than conventional Nitinol.

Nitinol Grade 5 ELI falls within the base chemistry of ASTM F2063, which covers wrought nickel-titanium shape-memory alloys for medical devices and implants. “ELI” and “Grade” designations for interstitial control and product form vary by manufacturer rather than forming a separate ASTM specification.

Nitinol Grade 5 refers to a shape-memory-oriented, higher-transformation-temperature Nitinol grade, while Grade 5 ELI applies extra-low-interstitial processing within the same base NiTi chemistry to improve fatigue life. The “ELI” designation is about cleanliness and fatigue performance, not a different transformation behaviour.

Yes. Nitinol Grade 5 ELI retains the superelastic and shape-memory characteristics of standard Nitinol; the ELI processing improves ductility and fatigue resistance without changing the underlying shape-memory mechanism.

Nitinol used in medical devices is manufactured and tested to standards such as ASTM F2063 to support biocompatibility requirements; suitability for a specific device should be confirmed against the applicable device standard, surface condition and intended use.

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