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Chemical composition and shape-recovery temperature

Properties

Ni

Ti

Co

Cu

shape-recovery temperature

Ni-Ti (KIOKALLOY-R)

54~56

Bal.

-

-

20~100°C

Ni-Ti-Co (KIOKALLOY-S)

53~55

Bal.

5~9

-

-30~30°C

Ni-Ti (KIOKALLOY-R)

47~50

Bal.

-

5~9

40~70°C

Shape-recovery temperature varies depending on forming and heat treatment conditions.

Mechanical properties

Properties

Ni-Ti Ni-Ti alloy

Ni-Ti Co Ni-Ti Co alloy

Ni-Ti Co Ni-Ti Co alloy

Martensitic phase	Tensile strength Mpa (kgf/mm2)	1175~1370 (120-140)	1370~1570 (140-160)	1175~1765 (120-180)
	Yield strength Mpa (kgf/mm2)	~196 (~20)	~294 (~30)	68~98 (7~10)
	Elongation Mpa (kgf/mm2)	~50	~50	~20
	Horizontal modulus of elasticity - Mpa (kgf/mm2)	7845~9800 (800~1000)	9800~13730 (1000~1400)	0~4900 (0~500)
Austensitic phase	Tensile strength Mpa (kgf/mm2)	1075~1175 (110-120)	1275~1370 (130-140)	1175~1765 (120-180)
	Yield strength Mpa (kgf/mm2)	390~785 (40~80)	490~980 (50~100)	390~785 (40~80)
	Elongation Mpa (kgf/mm2)	~20	~20	~20
	Horizontal modulus of elasticity - Mpa (kgf/mm2)	17650~21575 (1800~2200)	19600~24500 (2000~2500)	19615~27460 (2000~2800)

Mechanical properties vary depending on heat treatment conditions and service temperatures.

Comparaison of physical properties

Metal

Density (g/cm3)

Melting Point (C°)

Linear expansion coefficient (x10-6/K)

Specific heat (J/(kg.K))

Thermal conductivity (W/(m.K))

Specific electric resistance (x10-8 m)

Ni-Ti

6.5

1250~1280

10

440

12.1

80~100

Ni-Ti-Co

6.5

1250~1280

-

470

12.7

-

Ni-Ti-Cu

6.4

1250~1270

-

460

13.5

-

Titanium

4.5

1668

8.4

520

17.1

55

Nickel

8.9

1453

15

460

92.0

9.5

Iron

7.9

1530

12

460

62.8

9.7

SUS304

7.7

1400~1420

17

500

16.3

72

Copper

8.89

1083

17

380

385.0

1.724

Physical properties, except for density and melting point, of Ni-Ti alloy vary depending on temperature.