High Performance
Nickel-Chromium-Iron
Heat and Corrosion
Resistant Alloy
Alloy 601
Product
Description 		Nickel-chromium-iron alloy 601 is a general-purpose engineering material for applications that require resistance to heat and corrosion. The outstanding characteristic of alloy 601 is its resistance to high-temperature oxidation. The alloy also has good resistance to aqueous corrosion, has high mechanical strength, and is readily formed, machined, and welded.
The limiting chemical composition of alloy 601 is listed in Table 1. The composition is a face-centered-cubic solid solution with a high degree of metallurgical stability. The alloy's nickel base, in conjunction with a substantial chromium content, provides resistance to many corrosive media and high-temperature environments. Oxidation resistance is further enhanced by the aluminum content.
Nominal Chemistry
Ni Cr C Mn Si S Fe
Max 63.0 25.0 0.10 1.0 1.0 0.015 Bal
Min 58.0 21.0
High Performance Alloys can make hot rolled, cold worked, and strain hardened high performance stainless steel bars in-house now. Ask for our GFM Bulletin for more information about our bar processing capabilities. We have expanded to enhance product availability. HPA also has a full line of high strength nickel based alloys.
Typical Annealed Mechanicals
Properties UT 0.2% YS Elong. Hardness
Condition (KSI) (KSI) (%) Rockwell
Cold Worked/Annealed
Min 80 KSI 30 KSI 40 60
Max 115 KSI 60 KSI 70 80

Properties & General Data
The most important property of Alloy 601 is resistance to oxidation at very high temperatures up to 1250°C. Even under severe conditions such as, cyclical heating and cooling. This is possible due to Alloy 601 having a tightly adherent oxide layer which is resistant against spalling.
  • Resistance to carburization is good, also resistant to carbon nitriding conditions.
  • due to high chromium and some aluminum content, good resistance in oxidizing sulfur bearing atmospheres at elevated temperatures is demonstrated.
Physical Properties
Density 8.1 g/cm cube
Specific Heat 461 J/kg K
Electrical Resistivity 119 micro ohms cm
Curie Temperature -190° C
Melting Range 1320° - 1370° C
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CHARACTERISTICS
  • The most important property of Alloy 601 is resistance to oxidation at very high temperatures up to 1250°C. Even under severe conditions such as, cyclical heating and cooling. This is possible due to Alloy 601 having a tightly adherent oxide layer which is resistant against spalling.
  • Resistance to carburization is good, also resistant to carbon nitriding conditions.
  • Due to high chromium and some aluminum content, good resistance in oxidizing sulfur bearing atmospheres at elevated temperatures is demonstrated.
Specifications
Form Standard
Metal Type UNS N06601
Bar ASTM B166 Din 17752
Wire
Sheet ASTM B168 Din 17750
Plate ASTM B168 Din 17750
Fitting
Forging Din 17754
Weld Wire FM 82
Weld Electrode FM 617
Din 2.4851

Applications
  • Tray baskets and fixtures used in various heat treatments such as carburizing and carbon nitriding.
  • Refractory anchors, strand annealing and radiant tubes, high velocity gas burners, wire mesh belts etc.
  • Insulating cans in ammonia reformers and catalyst support grids used in nitric acid production.
  • Thermal reactors in exhaust system of petrol engines.
  • Fabricated combustion chambers.
  • Tube supports and ash trays in the power generation industry.
Specifications
Carbide tools are suggested for rates better than 50% of Type 304.
Machining Type Suggested starting rates are:
Single Point turning : Roughing - 0.15" depth, 0.015"/rev
feed -175 SFM
Finishing - 0.025" depth, 0.007"/rev
feed - 200 SFM
Drilling : 1/4" Dia hole - 0.004"/rev feed - 60 SFM
1/2" Dia hole - 0.007"/rev feed - 60 SFM
3/4" Dia hole - 0.010"/rev feed - 60 SFM
Reaming : Feed - same as drilling - 100 SFM
Side and Slot Milling : Roughing - 0.25" depth - 0.007"/tooth feed - 125SFM
Finishing - 0.050" depth - 0.009"/tooth feed - 140SFM
These rates are for carbide tools,
Type C-2 for roughing, drilling and reaming
Type C-3 for finishing.
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