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Shape Memory Alloys & Super-elastic Alloys   Furukawa Ni-Ti Alloys
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Ni-Ti Tube

Available in wide range of sizes with the strict OD & ID / WT dimensions throughout the length, Furukawa Ni-Ti Tubes have been the choices of various customers for Stents, Heart-valve frames, Catheters, and many other applications.  Furukawa has a unique vacuum melting & production line with fine control of the disperse of inclusions.  Our tubes are made of one of the most durable (good fatigue life) alloys available (conforms with ASTM F 2063).




Inclusion Comparison (extracted by SPEED method)
Furukawa Company A

1. Alloy type & composition

Alloy type Composition Ingot Af
(ºC)
(at%) (mass%)
NT-N 50.95Ni-Ti 56.01Ni-Ti -10 ~ 12
NT-E4 50.85Ni-Ti 55.91Ni-Ti 5 ~ 28
NT-E9 50.70Ni-Ti 55.76Ni-Ti 20 ~ 35

Metallurgical properties
Dimension of inclusions and porosities Area
< 39 μm < 2.5 %
Comply with ASTM F 2063-18

Minor elements (mass%)
Ni 54.5 - 57.0
C max. 0.040
Co max. 0.050
Cu max. 0.010
Cr max. 0.010
H (note) max. 0.005
Fe max. 0.050
Nb max. 0.025
N max. 0.005
O max. 0.040
Ti Balance
Comply with ASTM F 2063-18
(note) H: final tube

2. Dimension

(mm)
Available range Standard tolerance +/-
Outer diameter Wall thickness OD WT
0.3 ~ 0.6 0.040 ~ 0.060 0.015 0.015
0.8 ~ 2.5 0.100 ~ 0.400 0.020 0.020
3.5 ~ 5.0 0.160 ~ 0.400 0.030 0.030
5.0 ~ 10.0 0.200 ~ 0.460 0.050 0.030
10.0 ~ 11.0 0.350 ~ 0.600 0.050 0.030
11.0 ~ 13.0 0.400 ~ 0.700 0.050 0.040

(inch)
Available range Standard tolerance +/-
Outer diameter Wall thickness OD WT
0.013 ~ 0.024 0.0016 ~ 0.0024 0.0006 0.0006
0.031 ~ 0.098 0.0039 ~ 0.0157 0.0008 0.0008
0.138 ~ 0.197 0.0063 ~ 0.0157 0.0012 0.0012
0.197 ~ 0.394 0.0079 ~ 0.0181 0.0020 0.0012
0.394 ~ 0.433 0.0138 ~ 0.0236 0.0020 0.0012
0.433 ~ 0.512 0.0157 ~ 0.0276 0.0020 0.0016

3. Transformation temperature and mechanical property

Alloy type Mechanical
Af (note)
3% UPS 6% PS UTS Elongation
ºC MPa (ksi) % MPa (ksi) %
NT-N -5 ~ 10 > 400 (58) 0.5 > 1050 (152) > 10
NT-E4 0 ~ 15 > 350 (50) 0.5 > 1000 (145)
NT-E9 10 ~ 25 > 320 (46) - > 1000 (145)
(note) Based on BFR (Bending Free Recovery)

4. Surface condition

Outer No oxide Centerless grinding
Pickled
Thin oxide
Inner No oxide Pickled
Thin - black oxide

 


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