1.Chemical composition :
|
Carbon
|
0.38 - 0.43
|
|
Chromium
|
0.7 - 0.9
|
|
Iron
|
Balance
|
|
Manganese
|
0.6 - 0.8
|
|
Molybdenum
|
0.2 - 0.3
|
|
Nickel
|
1.65 - 2
|
|
Phosphorus
|
0.035 max
|
|
Silicon
|
0.15 - 0.3
|
|
Sulphur
|
0.04 max
|
3.Dlivery condition: hot rolled, annealing ton ≤ HB269
4.Surface conditions : scaled (hot working finish)/ground/rough machining/fine machining/based on the customer's requirement
5. Mechanical Properites :
|
tensile strength σb (MPa)
|
min 980(100)
|
|
elongation δ5 (%)
|
min 12
|
|
reduction of areaψ (%)
|
min 55
|
|
impact absorbed energy Akv (J)
|
min 78
|
|
notched bar impact strength αkv(J/cm2)
|
min98(10)
|
|
yield point σs (MPa)
|
min835(85)
|
6. Applications: Used for manufacture big sized important Quenched-and-Tempered parts which request good toughness and high strength.such as top load shaft in heavy-duty machinery;
For steam turbine shaft, vane, and heavy-load transmission parts, fastening piece, crankshaft, gears etc. with diameter is biger than 250mm.
7.Physical Data
|
Density (lb / cu. in.)
|
0.28
|
|
Specific Gravity
|
7.8
|
|
Specific Heat (Btu/lb/Deg F - [32-212 Deg F])
|
0.116
|
|
Melting Point (Deg F)
|
2600
|
|
Thermal Conductivity
|
21
|
|
Mean Coeff Thermal Expansion
|
6.6
|
|
Modulus of Elasticity Tension
|
33
|
