What are the important parameters of Nitinol tube?

Nitinol is a kind of shape memory alloy.

Its expansion rate of more than 20%, fatigue life of 1 * 10 to the power of 7, damping characteristics are 10 times higher than ordinary springs, its corrosion resistance is better than the current good medical stainless steel, so it can meet the needs of all kinds of engineering and medical applications, is a very functional material.

In addition to its unique shape memory function, memory alloy also has the characteristics of wear resistance, corrosion resistance, high damping and superelasticity.

Memory alloys currently used include titanium-based, copper-based, and iron-based.At present, nitinol shape memory alloy is the most widely used, the most comprehensive research.Good stability, excellent biocompatibility and other characteristics, its application in medicine is other shape memory alloys can not be replaced.

1. Nitinol tube chemical composition

• NI(wt%)
• C(wt%)
• Co(wt%)
• Cu(wt%)
• Cr(wt%)
• Nb(wt%)
• Fe(wt%)
• O(m/n)
• N(m/n)
• H(m/n)
• Ti(wt%)

2. MECHANICAL PROPERTIES of Nitinol tubes

• Upper Platform Stress(Mpa)
• Tensile strengthsb (Mpa)
• Elongation(%)
• Residual elongationn(%)
• Three-point bending(gf)

3.PHYSICAL PROPERTIES

• Melting Point
• Density
• Electrical Resistivity
• Modulus of Elasticity
• Coefficient of Thermal Expansion

4. Nitinol tube surface status

• Oxidation state
• Ground state
• Clean state
• Bright state

5. Tolerance of inner diameter and outer diameter of Nitinol tube

6. The length of the nitinol tubing

7. The actual operation of nitinol tube Af temperatur

For finished tubes with an outer diameter of 0.3 mm-3.0 mm, after interception, the actual operation of the recovery of the final temperature can be tested by the bending recovery method specified in ASTM F2082-15.