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 δ   

Mpa

2400

2600

900

1000

compressive strength δ

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