%

C

Si

Mn

Cr

Ni

Al

Ti

Cu

P

S

Fe

Min

-

-

-

19.0

30.0

0.15

0.15

-

-

-

0.15

Max

0.1

1.0

1.5

23.0

35.0

0.6

0.6

0.75

0.03

0.015

remain

Temperature 0/℃

25

425

540

760

Hardness HB

138~198

120~170

119~161

66~91

Density g/cm³

7.97

Coefficient of expansion/(10-6/k)100~900℃

14.12~18.44

Specific heat capacity℃)/kg/(kg.k)℃

500

Resistivity℃)/（Ω.mm2/m)100~900℃

1.01~1.28

Thermal conductivity/w/(m.k)100~900℃

14.23~32.23