Nitinol Shape Memory Sheet Manufacturer and Supplier in India

Nickel (Ni)

54.5

57.0

Primary alloying element; tightly controlled to fix Af

Titanium (Ti)

Balance

Balance

Base metal matrix

Carbon (C)

—

0.050

Interstitial element; controlled to prevent excessive carbide inclusions

Oxygen + Nitrogen (O + N)

—

0.050

Combined limit to maintain fatigue strength and strain recovery

Cobalt (Co)

—

0.050

Trace impurity control

Iron (Fe)

—

0.050

Trace impurity control

Niobium (Nb)

—

0.025

Trace impurity control

Copper (Cu)

—

0.010

Trace impurity control

Chromium (Cr)

—

0.010

Trace impurity control

Hydrogen (H)

—

0.005

Controlled to prevent hydrogen embrittlement

Young’s Modulus (E)

83 GPa

26 to 48 GPa

Sheet is significantly stiffer once thermally activated.

Yield Strength (σ_y)

195 to 690 MPa

70 to 140 MPa

Martensite yield plateau allows easy cold deformation at low stress.

Ultimate Tensile Strength (UTS)

About 895 MPa annealed, up to about 1900 MPa cold worked

About 895 MPa annealed, up to about 1900 MPa cold worked

High structural integrity across all operational phases.

Max Recoverable Strain

Up to 8.0%

Up to 8.0%

Design for about 4% strain or less for repeated actuation.

Recovery Stress

300 to 600 MPa (typical constrained recovery stress)

—

Key sizing parameter: maximum blocked force output generated when heating a constrained sheet.

Poisson’s Ratio (ν)

0.33

0.33

Standard elastic contraction ratio across phases.

Density (ρ)

6.45 g/cm³

0.233 lbs/in³

Melting Point

1310 °C

2390 °F

Electrical Resistivity (Austenite)

~80 to 100 µΩ·cm

About 31 to 39 µΩ·in

Electrical Resistivity (Martensite)

~70 to 80 µΩ·cm

About 28 to 31 µΩ·in

Thermal Conductivity (Austenite)

~18 W/m·K

~10.4 BTU/ft·h·°F

Thermal Conductivity (Martensite)

~8.5 W/m·K

~4.9 BTU/ft·h·°F

Coefficient of Thermal Expansion (Austenite)

~11 × 10⁻⁶ /°C

~6.1 × 10⁻⁶ /°F

Coefficient of Thermal Expansion (Martensite)

~6.6 × 10⁻⁶ /°C

~3.7 × 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

0.076 mm

0.0030 in

0.490

0.100

2.04

0.10 mm

0.0039 in

0.645

0.132

1.55

0.15 mm

0.0059 in

0.968

0.198

1.03

0.20 mm

0.0079 in

1.290

0.264

0.78

0.25 mm

0.0098 in

1.613

0.330

0.62

0.30 mm

0.0118 in

1.935

0.396

0.52

0.40 mm

0.0157 in

2.580

0.528

0.39

0.50 mm

0.0197 in

3.225

0.661

0.31

0.75 mm

0.0295 in

4.838

0.991

0.21

1.00 mm

0.0394 in

6.450

1.321

0.16

1.50 mm

0.0591 in

9.675

1.982

0.10

2.00 mm

0.0787 in

12.900

2.642

0.08

2.50 mm

0.0984 in

16.125

3.303

0.06

3.00 mm

0.1181 in

19.350

3.963

0.05

0.076 mm to 0.15 mm

±0.010 mm

±0.50 mm

±1.0 mm

> 0.15 mm to 0.50 mm

±0.020 mm

±0.50 mm

±1.0 mm

> 0.50 mm to 1.00 mm

±0.035 mm

±1.00 mm

±2.0 mm

> 1.00 mm to 2.50 mm

±0.050 mm

±1.00 mm

±2.0 mm