China Machinery Metal Jiangsu Co., Ltd. |
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Shape memory alloy, super elastic Nitinol sheet, strip and foil for biomedicine, aerospace etc
PRODUCT
Shape memory alloy, super elastic Nitinol sheet, strip and foil for
biomedicine, aerospace etc.
OVERVIEW
Nitinol are the most comprehensively studied and best shape memory
alloys. They have the characteristics of high strength, high
plasticity, good corrosion resistance, good stability and excellent
biocompatibility. The superiority of its application in medicine is
that other shape memory alloys can not be replaced.
Nitinol combines two closely related unique characteristics: shape
memory and superelasticity. Shape memory gives Nitinol the ability
to be deformed at one temperature, and then return to its original
shape when being heated to its transformation temperature. This
effect is caused by the material changing from its low temperature
monoclinic martensitic structure to the high temperature cubic
austenitic structure.
SPECIAL PROPERTIES OF NITINOL
1 Shape memory
2 Super elastic
3 Sensitivity to changes in oral temperature
4 Good corrosion resistance
5 Toxin immunity
6 Gentle corrective force
7 Good shock absorption characteristics
APPLICATION OF NITINOL
Nitinol is widely used in aerospace machinery, mechano-electronic,
biomedicine and daily life because of its many excellent
properties.
1. For biomecicine, nitinol archwire is used for the early
alignment of patients' teeth. Nitinol push spring and tension
spring are springs used for orthodontic teeth, scoliosis orthopedic
device. In addition, nitinol was used in surgery to make various
bone connector, blood vessel clip, coagulation filters, blood
vessel dilation components, all kinds of intracavitary stent,
embolization device, heart patch, thrombus filters, interventional
guide wires and surgical sutures, etc.
2. For aerospace industry, SMA have been used in aerospace and
space applications such as low-temperature mating connectors for
hydraulic systems in military aircraft, and it is being developed
in Europe and the United States for the intelligent horizontal
rotor of helicopters. It is also being used for antenna of lunar
probes, and in the satellite, a shape memory release device is used
to open a container used to protect sensitive germanium detectors
from contamination during assembly and launch.
3. For mechno-electronic, SMA is used for low temperature mating
connectors, safety connector for wire braided layer of conductor,
springs that open and close the shutter to protect the fog lamp
from flying debris, and driving cylinder used in mechanical
manufacturing to replace a manual or hydraulic clamp, etc.
4. For daily life, SMA was used for anti-scald valve, glasses
frame, mobile phone antenna and fire check valve.
CHEMICAL COMPOSITION
Table 1
Fe | Ni | Cr | Cu | Nb |
≤0.05 | 54.5-57.0 | ≤0.01 | ≤0.01 | ≤0.025 |
C | Ti | Co | N+O | H |
≤0.05 | Balanced | ≤0.05 | ≤0.050 | ≤0.005 |
The chemical composition is as per ASTM F2063-12 or GB
24627-2009(wt%)
PHYSICAL PROPERTIES
Table 2
Melting Point | 1310℃ |
Density | 6.5 g/cm3 |
Specific el. resistivity | 82 μΩcm |
Coefficient of thermal expansion (CTE) | 11×10-6 °K |
Modulus of elasticity | 41-75 GPa |
NITINOL SHEET, STRIP & FOIL
Nitinol sheet, strip and foil are the newest and most exciting
product forms for this unique shape memory alloy. Nitinol sheet is
ideal for laser cutting, etching, stamping and EDM machining.
Efficient processing and surface finishing establishes a smooth,
light oxide surface.
Many new medical innovations are now possible with the use of this
very thin and versatile Nitinol form. Sheet is a two-dimensional
structure, unlike wire and tube, giving us design options like
stamping, punching, and deep drawing.
Photochemically - etched parts
Formed sheet shapes
EDM or laser cut shapes
SIZES & SURFACES
Table 3
Form | Available sizes | Surfaces |
Sheet | Thickness from 0.051mm to 2.50mm | Natural Oxide |
Strip | Thickness from 0.051mm to 2.03mm Width 0.305mm to 10.0mm | Natural Oxide |
Foil | Thickness from 0.013mm to 0.050mm Width up to 76.2mm | Natural Oxide |
Typical Alloys and nominal active Af
As(f.a.) -25C ± 10℃, active Af 0℃
As(f.a.) -15C ± 10℃ (most common), Active Af +5℃
As(f.a.) -15C ± 10℃ Redox, Active Af +5℃
As(f.a.) +20C ± 15℃, Active Af +28℃
As(f.a.) +65C ± 20℃, Active Af +70℃
As(f.a.) +95C ± 5℃, Active Af > +80℃
DELIVERY CONDITION
Cold worked
Straight annealed
Flat annealed
Shape set annealed
ADVANTAGE
1. First of all, all incoming Nitinol raw materials are subjected
to third party inspection to ensure they meet proprietary
specifications for chemistry, transformation temperature, material
homogeneity, and microstructure. To promote an exceptionally smooth
and uniform surface finish quality, all wire and tube products
utilize a high precision single and or multi-crystalline diamond
drawing die technology. After the correct super-elastic heat
treatment, medical grade nickel-titanium materials can undergo up
to 8% strain without permanent bending at human temperature.
2. All our Nitinol material and products are made according to
customers specifications.
3. Material can be provided as super elastic or higher
transformation temperature shape memory from 0℃ to 100℃.
STANDARD SPECIFICATION
Table 4
ASTM F2063-12 | Standard chemical composition of a wrought nitinol shape memory alloy used in medical devices and surgical implants |
GB 24627 | Standard chemical composition of a wrought nitinol shape memory alloy used in medical devices and surgical implants |
ASTM F2633-13 | Standard specification for seamless nitinol shape memory alloy fitting for medical devices and surgical implants |
ASTM F2005-05 | Standard terminology for nitinol shape memory alloys |
ASTM F2004-05 | A standard test method for the transition temperature of Nitinol alloy by thermal analysis |
ASTM F2516-14 | Tensile test method for nitinol hyperelastic materials |
ASTM F2082-15 | The standard test method for phase transition temperature of nitinol shape memory alloy by bending and free restoration. |
BUSINESS TERM
Minimum Order Quantity | Negotiable |
Price | Negotiable |
Packaging Details | Water prevent, seaworthy transport, non-fumigation wooden box |
Mark | As per order |
Delivery Time | 60-90 days |
Payment Terms | T/T, L/C at sight, D/P |
Supply Ability | 30 metric tons per month |
NOTE:
More information available from our official web site
http://www.cmmetal.cn