General Properties
Applications
Standards
Chemical Analysis
Physical Properties
Mechanical Properties
Corrosion Resistance
Heat Resistance
Fabrication Data
General Properties
Alloy 600 (UNS N06600) is a versatile nickel-chromium-iron alloy that be utilized in temperatures ranging from cryogenic up to 2000°F (1093°C) and for corrosion resistant service. The high nickel content assures the alloy will be virtually immune to chloride-ion stress corrosion cracking while also providing corrosion resistance to many organic and inorganic compounds. The chromium content provides resistance to oxidizing environments at high temperatures or in corrosive media, it also resists sulfur compounds.
In high temperature service, Alloy 600 resists oxidation and scaling up to 2000°F (1093°C). It is well suited for applications requiring carburization resistance or in sulfur containing environments at moderate temperatures. However, it is subject to sulfidation at high temperatures.
Alloy 600 is non-magnetic and cannot be hardened by heat treatment, only by cold working. It can be easily welded and processed by standard shop fabrication practices.
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Applications
- Aerospace Components
- Chemical Processing – chlorination equipment, fatty acids, hydrogen fluoride, magnesium chloride, vinyl chloride monomer, sodium sulfide, titanium dioxide
- Food Processing
- Petrochemical Processing – catalyst regenerators
- Power Generation – nuclear components
- Pulp and Paper – abietic acid equipment
- Thermal Processing – baskets and trays, boxes, muffles and retorts, nitriding containers, roller hearths, vacuum furnace components
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Standards
| ASTM.......................... |
B 168 |
| ASME.......................... |
SB 168 |
| AMS ........................... |
5540 |
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Chemical
Analysis
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Physical
Properties
Density
0.304 lbs/in3
8.42 g/cm3 |
|
Specific Heat
0.106 BTU/lb-°F (32 – 212°F)
444 J/kg-°K (0 – 100°C) |
Electrical Resistivity
620 Microhm-in at 68°F
1.03 Microhm-cm at 20°C
|
|
Modulus of Elasticity
31.1 x 106 psi
214 GPa |
Melting Range
2470 – 2575°F
1354 – 1413°C
|
|
Thermal Conductivity 200°F (100°C)
109 BTU/hr/ft2/ft/°F
15.9 W/m-°K |
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Mechanical
Properties
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Corrosion
Resistance
Alloy 600 resists corrosion in a variety of environments. Because of the high chromium content of the alloy, it is superior to Nickel 200/201 under oxidizing conditions and its high nickel content enables it to perform well in reducing environments. The presence of nickel also provides excellent resistance to alkaline solutions.
Alloy 600 has moderate resistance to strongly oxidizing acids. However, oxidation occurring in dissolved air alone is not sufficient to insure complete passivity and freedom from attack by air-saturated mineral acids and certain concentrated organic acids.
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Heat
Resistance
Alloy 600 is used extensively in the thermal processing industry where resistance to oxidation and furnace atmospheres is required. The alloy is also utilized in nitriding applications because of its resistance to nitrogen at high temperatures.
The alloy’s resistance to oxidation and scaling at 1800oF (980oC) is shown in the chart below.
Alloy 600 also has good resistance to carburization per the results of tests in a high temperature carburizing atmosphere.
Alloy 600 can be used in sulfur compound service at moderate temperatures, but it is prone to sulfidation in high temperature, sulfur containing atmospheres.
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Fabrication Data
Alloy 600 can be easily welded and processed by standard shop fabrication practices. The alloy cannot be hardened by heat treatment, only by cold working.
Hot Forming
The hot-working temperature range for Alloy 600 is 1600 – 2250oF (870 – 1230oC). Heavy working needs to occur between 1900 – 2250oF (1040 – 1230oC), while lighter working can take place down to 1600oF (870oC). The ductility of the alloy is adversely impacted at temperatures between 1200 – 1600oF (650 – 870oC) making it necessary to avoid hot working in this temperature range. High tensile properties can be obtained by careful working at temperatures below 1200oF (650oC).
Cold Forming
Alloy 600 can be cold-formed by the standard shop fabrication practices used carbon and stainless steel. Work hardening rates are greater than mild steel, but less than those of 304.
Welding
Alloy 600 can be readily welded by most standard processes including GTAW (TIG), PLASMA, GMAW (MIG/MAG) and SMAW (MMA). A post weld heat treatment is not necessary. Brushing with a stainless steel wire brush after welding will remove the heat tint and produce a surface area that does not require additional pickling.
Machining
The machinability of Alloy 600 is slightly better than 304, but not as good as 303 free-machining stainless steel. It should preferably be machined in the annealed condition. Since Alloy 600 is prone to work–hardening, only low cutting speeds should be used and the cutting tool should be engaged at all times. Adequate cut depth is necessary to assure avoiding contact with the previously formed work-hardened zone.
The information and data in this product data sheet are accurate to the best of our knowledge and belief, but are intended for informational purposes only, and may be revised at any time without notice. Applications suggested for the materials are described only to help readers make their own evaluations and decisions, and are neither guarantees nor to be construed as express or implied warranties of suitability for these or other applications.
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