General Information
Chemical Composition
Physical Properties
Mechanical Properties
General Information
Nconel 600 is a nickel-base alloy with excellent carburization, and good oxidation resistance at elevated temperatures. The alloy has long been used in the heat treating industry for many of the same applications as RA330®. 600 alloy has useful resistance to dry Cl2 and HCl gases at moderately elevated temperatures. Alloy 600 is not suggested for use at red heat when sulfur is present due to elevated nickel quantities.Grades 200 and 201 nickel are normally preferred for handling concentrated, high temperature caustic. However, when sulfur compounds are present as well, or for ammonium hydroxide service,600 alloy is suggested. 600 alloy is subject to stress corrosion cracking in hot, concentrated caustic alkalies. To avoid stress corrosion cracking, the 600 alloy fabrication should be fully stress relieved prior to use.
Standard Inventory Specifications
- AMS 5540,
- AMS 5665,
- ASME SB 166,
- ASME SB 167,
- ASME SB 168,
- ASTM B 166,
- ASTM B 167,
- ASTM B 168,
- EN 2.4816,
- UNS N06600
Features
- Virtually immune to chloride ion stress corrosion cracking
- Good caustic corrosion resistance
- Resistant to dry Cl2 to about 1000°F
- Oxidation resistance to 2000°F
- Carburization resistance
Applications
- Heat treating muffles and retorts
- Vacuum furnace fixtures
- Chlorination equipment to 1000°F
- Titanium dioxide plants
Chemical Composition
Alloy 600 Chemical Composition
Element
Percent by Weight
Ni
Nickel
72.00%
Cr
Chromium
14.0 – 17.0%
Fe
Iron
6.0 – 10.0%
C
Carbon
0.05 – 1.50%
Mn
Manganese
1.0% Max
Si
Silicon
0.5% Max
Cu
Copper
0.5% Max
Al
Aluminum
0.3% Max
Ti
Titanium
0.3% Max
B
Boron
0.006% Max
P
Phosphorus
0.015% Max
S
Sulfur
0.015% Max
Physical Properties
600 Physical Properties
Property | Data | |
Density, lb/in3 | 0.304 | |
Modulus of Elasticity, psi | 31.1 x 106 | |
Coefficient of Thermal Expansion, 68-212˚F, /˚F | 9.3 x 10-6 | |
Thermal Conductivity, Btu/ft hr ˚F | 109 | |
Specific Heat, Btu/lb 32-212˚F | 0.106 | |
Electrical Resistivity, Microohm-in at 68 | 620 |
Mechanical Properties
Mechanical Properties and Yield Strength of Alloy 600
Temperature, °F | 70 | 1000 | 1200 | 1400 | 1600 | 1800 | |
0.2% Yield Strength, ksi | 37 | 28.5 | 26.5 | 17 | 9.0 | 4.0 | |
Ulimate Tensile Strength, ksi | 93 | 84 | 65 | 27.5 | 15 | 7.5 | |
Charpy Impact V-notch, ft-lbs | 45 | 47 | 39 | 46 | 80 | 118 |

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