capacity

units

GCr15

9Cr18

Si3N4

ZrO2

density

g/cm3

7.8

7.9

3.2

6

thermal expansion α

11

17

3.2

10.5

elastic modulus E

Gpa

208

200

320

210

Poisson's ratioµ

0.3

0.3

0.26

0.3

hardnessHV

800

700

1700

1300

flexural strength   

Mpa

2400

2600

900

1000

compressive strength   

Mpa

2000

3500

tenacity Kc

Nm/cm2

20

25

7

11

thermal conductivity λ

W/mk

30-40

15

3.5

2.5

specific resistance Ω

mm2/m

1

0.75

10(18)

10(15)

specific heat

J/KgK

450

450

800

400

temeperature

°C

120

150

1000

800

anti-corrosion

feebleness

strong

strong

stress cycle time(50%damage probility

10*10(6)

10*10(6)

50*10(6)

50*10(6)

flow contact tiredness invalidation form

peel

peel

peel

peel/rupture