Jul 30 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Fabrication and Heat Treatment
Machinability
Forming
Welding
Heat Treatment
Forging
Hot Working
Annealing
Hardening
Other Designations
Applications
Introduction
Nicrofer 6619 hMo alloy is a wrought nickel-chromium-molybdenum alloy that exhibits good corrosion resistance at elevated temperatures.
The following datasheet will discuss in detail about nicrofer 6619 hMo alloy.
Chemical Composition
The chemical composition of nicrofer 6619 hMo alloy is outlined in the following table.
|
Element |
Content (%) |
|
Chromium, Cr |
14-18 |
|
Molybdenum, Mo |
14-17 |
|
Iron, Fe |
3 |
|
Cobalt, Co |
2 |
|
Manganese, Mn |
1 |
|
Titanium, Ti |
0.7 |
|
Silicon, Si |
0.08 |
|
Phosphorus, P |
0.04 |
|
Sulfur, S |
0.03 |
|
Carbon, C |
0.015 |
|
Nickel, Ni |
Balance |
Physical Properties
The following table shows the physical properties of nicrofer 6619 hMo alloy.
|
Properties |
Metric |
Imperial |
|
Density |
8.63 g/cm3 |
0.312 lb/in3 |
|
Melting point |
1430°C |
2600°F |
Mechanical Properties
The mechanical properties of nicrofer 6619 hMo alloy are displayed in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength (Heat treated) |
116 MPa |
16824 psi |
|
Yield strength (Heat treated) |
61 MPa |
8847 psi |
|
Elongation at break (Heat treated) |
54% |
54% |
Thermal Properties
The thermal properties of nicrofer 6619 hMo alloy are given in the following table.
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient |
10.8 µm/m°C |
6 µin/in°F |
|
Thermal conductivity |
11.4 W/mK |
79 BTU.in/hrft².°F |
Fabrication and Heat Treatment
Machinability
Nicrofer 6619 hMo alloy can be machined by conventional techniques.
Forming
The alloy can be readily formed using conventional methods.
Welding
All common welding methods can be employed to weld the alloy, except submerged arc or oxy-acetylene welding.
Heat Treatment
Nicrofer 6619 hMo alloy can be heat treated at (1950°F).
Forging
The alloy can be hot forged at temperatures ranging from (2150 to 1750°F).
Hot Working
Nicrofer 6619 hMo alloy can be hot worked similar to stainless steels.
Annealing
The alloy can be solution annealed at (1950°F) followed by rapid quenching.
Hardening
The alloy can be hardened by cold working only.
Other Designations
Other designations that are equivalent to nicrofer 6619 hMo alloy include the following:
-
ASTM B574
-
ASTM B575
-
ASTM B619
-
ASTM B622
-
ASTM B626
-
DIN 2.4610
Applications
Nicrofer 6619 hMo alloy can be used to manufacture chemical process equipment and other equipments that are used at high temperatures.