1. Chemical composition(%)
|
Grade
|
C
|
Si
|
Mn
|
P
|
S
|
Ni
|
Co
|
Fe
|
|
4J29
|
0.015
|
0.12
|
0.25
|
0.006
|
0.005
|
29.10
|
17.3
|
Bal
|
2. Physical properties
|
Grade
|
Density(g/cm3)
|
Thermal expansion coefficient (10-6/℃)
|
Curie point(℃)
|
Volume resistivity(μΩ.cm)
|
Thermal conductivity(W/m. ℃)
|
|
4J29
|
8.17
|
5.0(20~300℃)
5.2(20~450℃
|
430
|
46(20℃)
|
20.3
|
3. Mechnical properties
|
Grade
|
Yield Strength(Mpa)
|
Tensile Strength
|
Elongation(%)
|
Hardness(HV)
|
|
|
4J29
|
Temper rolled
|
695
|
780
|
5
|
230
|
|
As annealed
|
315
|
520
|
24
|
148
|
|