Chemical composition % of the ladle analysis of steel grade:20NiCrMoS6-4
|
C(%)
|
Si(%)
|
Mn(%)
|
P(%)
|
S(%)
|
Cr(%)
|
|
|
| 0.16-0.23 |
Max 0.40 |
0.50-0.90 |
Max 0.035 |
0.020-0.040 |
0.60-0.90 |
|
Ni(%)
|
Mo(%)
|
Ti(%)
|
V(%)
|
W(%)
|
Nb(%)
|
|
|
| 1.40-1.70 |
0.25-0.35 |
|
|
|
|
|
Co(%)
|
Cu(%)
|
Al(%)
|
B(%)
|
N(%)
|
Other
|
|
|
| |
|
|
|
|
|
Process: EAF+LF+VD+Forged Treatment(optional)
SIZE RANGE:
Round:
Hot Forged: 50mm-2000mm
Flat:
Hot forged: Thickness:50-600mm Width: up to 1600mm
SURFACE FINISHES:
Black, Turned & Grinded
Test: Ultrasonic test according to SEP 1921-84 C/c, D/d, E/e
Heat Treatment
Annealing, Normalizing, Quenching, Tempering
Mechanical Properties
| Properties |
Conditions |
| T (°C) |
Treatment |
| Density (×1000 kg/m3) |
7.7-8.03 |
25 |
|
| Poisson's Ratio |
0.27-0.30 |
25 |
|
| Elastic Modulus (GPa) |
190-210 |
25 |
|
| Tensile Strength (Mpa) |
1158 |
25 |
oil quenched, fine grained, tempered at 425°C |
| Yield Strength (Mpa) |
1034 |
| Elongation (%) |
15 |
| Reduction in Area (%) |
53 |
| Hardness (HB) |
335 |
25 |
oil quenched, fine grained, tempered at 425°C |
THERMAL PROPERTIES
| Properties |
Conditions |
| T (°C) |
Treatment |
| Thermal Conductivity (W/m-K) |
42.7 |
100 |
|
| Specific Heat (J/kg-K) |
477 |
50-100 |
|
HYSICAL PROPERTIES
| Quantity |
Value |
Unit |
| Thermal expansion |
16 - 17 |
e-6/K |
| Thermal conductivity |
16 - 16 |
W/m.K |
| Specific heat |
500 - 500 |
J/kg.K |
| Melting temperature |
1370 - 1400 |
°C |
| Service temperature |
0 - 500 |
°C |
| Density |
8000 - 8000 |
kg/m3 |
| Resistivity |
0.7 - 0.7 |
Ohm.mm2/m |
