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Nitinol Super Elastic Rod Manufacturer and Supplier in India

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Nitinol Super Elastic Rod is a nickel-titanium (NiTi) alloy rod designed to be bent and bent many times without heating. The rod exhibits superelasticity when used above the austenite finish (Af) temperature, exhibiting a reversible transition between the austenite and martensite phase. This allows for great recoverable strain and allows the rod to regain its original shape when the applied force is removed. It’s made of ASTM F2063 Nitinol and is available in custom diameters and lengths for medical devices, actuators, robotics, aerospace and precision mechanisms. Traceability and quality verification can be carried out by providing material test certificates. Sachin Steel Centre manufactures and delivers Nitinol Super Elastic Rod to your specifications, technical assistance, and is ideal for industrial and specialist applications.

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Table Of Content

Technical Data

Specifications of Nitinol Super Elastic Rod

Parameter

Specification

Material

Nickel titanium (NiTi, Nitinol), Ni 54.5 to 57.0 weight percent, Ti balance

Standard

ASTM F2063 / ASME SF2063, edition [Sachin to confirm]

Form

Round rod, straight, cut to length

Behaviour

Superelastic (pseudoelastic) at service temperatures above Af

Af Range

−15 to +20 °C (typical active Af range for room/body temperature superelasticity; set by composition and processing)

Diameter Range

[3.0 mm to 25.0 mm / Sachin to confirm] (matching the size chart and Rods & Bars page; custom sizes up to 94 mm on request)

Length

[500 mm / Sachin to confirm] to 3000 mm, or cut to length

Straightness

0.5 mm per metre maximum; 0.25 mm per metre for precision rod [Sachin to confirm]

Diameter Tolerance

1.0 to 3.0 mm: ±0.02 mm
3.1 to 10.0 mm: ±0.05 mm
10.1 to 25.0 mm: ±0.10 mm

Surface Finish

Pickled, centerless ground, polished or black oxide

Density

6.45 g/cm³ (0.233 lb/in³)

Testing

Af by differential scanning calorimetry (ASTM F2004) or bend and free recovery (ASTM F2082). Tension and plateau by ASTM F2516. Chemical and mechanical certificate per lot.

Certification

Material Test Report (MTC) confirming chemical composition and mechanical properties against ASTM F2063 per lot

Chemical Composition of Nitinol Super Elastic Rod

Element

Min (wt %)

Max (wt %)

Nickel (Ni)

54.5

57.0

Titanium (Ti)

Balance

Balance

Carbon (C)

—

0.050

Oxygen + Nitrogen (O + N)

—

0.050

Cobalt (Co)

—

0.050

Iron (Fe)

—

0.050

Niobium (Nb)

—

0.025

Copper (Cu)

—

0.010

Chromium (Cr)

—

0.010

Hydrogen (H)

—

0.005

Mechanical Properties of Nitinol Super Elastic Rod

Property

Typical Value

Test / Standard Basis

Austenite Young’s Modulus (Ea)

About 41 to 83 GPa

Initial linear elastic region prior to plateau

Upper Plateau Stress (UPS)

About 380 to 550 MPa at 3% strain (tested at [test temperature] °C)

ASTM F2516 loading cycle

Permanent Set After 6% Strain

0.3% maximum (confirm for rod)

ASTM F2516 strain-unload cycle

Ultimate Tensile Strength (UTS)

1070 MPa minimum, up to about 1900 MPa by diameter and cold work

ASTM F2516 fracture point

Elongation to Failure

10% minimum (confirm for rod)

Total strain capacity at material fracture

Recoverable Strain

Up to ~8.0%

Pseudoelastic reversible strain

Poisson’s Ratio (ν)

~0.33

Standard isotropic value for austenitic matrix

Physical Properties of Nitinol Super Elastic Rod

Property

Metric Value

Imperial Value

Density

6.45 g/cm³

0.233 lb/in³

Melting Point

~1310 °C

~2390 °F

Electrical Resistivity (austenite)

~80 to 100 µΩ·cm

About 31 to 39 µΩ·in

Thermal Conductivity (austenite)

~18 W/(m·K)

~10.4 BTU/(ft·h·°F)

Coefficient of Thermal Expansion (austenite)

~11 × 10−6 /°C

~6.1 × 10−6 /°F

Specific Heat

~837 J/(kg·K)

~0.20 BTU/(lb·°F)

Latent Heat of Transformation

~24.2 J/g

~10.4 BTU/lb

Size Chart of Nitinol Super Elastic Rod

Diameter (mm)

Diameter (in)

Area (mm²)

Weight (kg/m)

Weight (lbs/ft)

Length per kg (m)

3 mm

0.118 in

7.1

0.046

0.031

21.9

4 mm

0.157 in

12.6

0.081

0.054

12.3

5 mm

0.197 in

19.6

0.127

0.085

7.9

6 mm

0.236 in

28.3

0.182

0.123

5.5

8 mm

0.315 in

50.3

0.324

0.218

3.1

10 mm

0.394 in

78.5

0.507

0.340

2.0

12 mm

0.472 in

113.1

0.729

0.490

1.4

15 mm

0.591 in

176.7

1.140

0.766

0.88

16 mm

0.630 in

201.1

1.297

0.871

0.77

20 mm

0.787 in

314.2

2.026

1.362

0.49

25 mm

0.984 in

490.9

3.166

2.128

0.32

30 mm

1.181 in

706.9

4.559

3.064

0.22 (on request)

40 mm

1.575 in

1256.6

8.105

5.447

0.12 (on request)

50 mm

1.969 in

1963.5

12.665

8.510

0.08 (on request)

60 mm

2.362 in

2827.4

18.237

12.255

0.05 (on request)

75 mm

2.953 in

4417.9

28.495

19.148

0.04 (on request)

94 mm

3.701 in

6939.8

44.762

30.078

0.02 (on request)

Nitinol Super Elastic Rod Weight per Cut Length

Diameter (mm)

500 mm Cut Length

1000 mm Cut Length

2500 mm Cut Length

3 mm

22.8 g

45.6 g

114 g

5 mm

63.3 g

127 g

317 g

8 mm

162 g

324 g

811 g

10 mm

253 g

507 g

1.27 kg

12 mm

365 g

729 g

1.82 kg

20 mm

1.01 kg

2.03 kg

5.07 kg

25 mm

1.58 kg

3.17 kg

7.92 kg

Applications and Industrial Uses of Nitinol Super Elastic Rod

  • Guidewire and instrument blank stock (material only)  
  • Orthodontic file blanks  
  • Shape set parts
  • Stent Delivery Systems
  • Robotic Actuation Components
  • Aerospace Actuation Mechanisms
  • Vibration and Shock Absorption Systems
  • Flexible Mechanical Springs and Couplings
Application Industries

Frequently Asked Questions

A Nitinol Super Elastic Rod is a nickel-titanium alloy rod that can undergo large deformation and return to its original shape after the load is removed.

 

It works through a reversible stress-induced transformation from austenite to martensite during loading and back to austenite during unloading.

A superelastic rod recovers its shape when the load is removed, while a shape memory rod requires heating above its transformation temperature.

A Nitinol Super Elastic Rod can typically recover up to about 8% strain, depending on material condition and operating conditions.

Yes, they can be customized in diameter, length, surface finish, and transformation temperature according to application requirements.

Pick an Af below the lowest temperature the rod will see; a higher nickel content gives a lower Af.

For repeated use, keep strain near 4% or less. The minimum bend radius is about 12 times the rod diameter.

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