Alloy 601 / 2.4851
Alloy 601H is a nickel-chromium-iron alloy with additions of aluminium and titanium. It is characterized by:
outstanding resistance to oxidation at high temperatures
good resistance to carburizing conditions
good resistance to stress-corrosion cracking
good resistance at oxidating, sulfur-containing atmospheres good mechanical properties at both room and elevated temperatures due to solid solution hardening.
Material Data Sheet
| Material Designation | 2.4851 |
|---|---|
| Alloy | Alloy 601H |
| EN Material Symbol | NiCr23Fe |
| UNS | N 06601 |
| Trademark | Nicrofer® 6023-H |
| ISO | NiCr23Fe15Al |
Main fields of application of alloy 601H
In the sector of elevated temperatures, Alloy601H has a wide variety of applications. Apart from applications in furnace construction, chemical processing, pollution control and power generation, there is a variety of further purposes, i.e.:
refractory anchors, strand-annealing and radiant heater tubes, high-velocity gas burners, wire mesh belts in industrial furnaces
trays, baskets and fixtures for heat treatment plant , i.e. for carbonization or carbonitiding
combustion chambers in solid waste incinerators
components in exhaust gas systems
tube supports and ash-handling components
Chemical composition of alloy 601H
| C | Si | Mn | P | S | Cr |
|---|---|---|---|---|---|
| ≤ % | ≤ % | ≤ % | ≤ % | ≤ % | % |
| 0.03-0.1 | 0.5 | 1.0 | 0.02 | 0.015 | 21.0-25.0 |
| Al | Ni | Ti | Cu | Fe | B | Co |
|---|---|---|---|---|---|---|
| % | % | % | ≤ % | ≤ % | ≤ % | A max. of 1,5% Co, which is valued as Nickel, is allowed. |
| 1.0-1.7 | 58.0-63.0 | 0.5 | 0.5 | 18.0 | 0.006 | No value for Co specified in ASTM. |
Characteristics of alloy 601H
| Temperature Range | High-Temperature Range |
|---|---|
| Density | 8,1 g/cm³ |
| Melting Rage | 1320°C – 1370°C |
| Elongation of Alloy 601H plate at 20°C | ≥ 30 % |
Filler metal (for welding with alloy 601H)
For the gas-shielded welding processes, filler metal with an overalloyed composition compared to the base metal is recommended:
Welding rods and bare electrodes 2.4649:
DIN EN ISO 18274: S Ni 6602 (NiCr25Fe10AlY)
UNS N06025
AWS A5.14 ERNiCrFe-12
Covered electrodes 2.4633:
DIN EN ISO 14172: E Ni 6704 (NiCr25Fe10Al3YC)
UNS W86025
AWS A5.11: ENiCrFe-12
2.4628