601

601

Inconel 601 is a nickel-chromium alloy, that is highly resistant to oxidation through 2200°F. 601 alloy develops a tightly adherent oxide scale which resists spalling even under severe thermal cycling. The alloy has good high temperature strength, and retains its ductility after long service exposure. 601 alloy has good hot corrosion resistance under oxidizing conditions. 601 alloy is not suggested for use in strongly reducing, sulfur bearing environments.

For maximum oxidation resistance, 601 alloy should be welded with matching composition 601 alloy GTAW wire. The weld fillers developed for RA 602 CA can also provide a weld which is stronger and more oxidation resistant than the 601 alloy base metal. 601 alloy is more difficult to machine than 304 stainless steel. Its machinability rating is 15-21% relative to AISI B1112 steel.

Chemistry

 NiCrAlCMnCuSiSFe
MIN 58.00 21.00 1.00 -- -- -- -- -- --
MAX 63.00 25.00 1.70 0.10 1.00 1.00 0.50 0.015 Balance

*ASTM specification 0.20 max C.

Specifications

AMS 5715AMS 5870
ASME SB 167ASME SB 168
ASTM B 167ASTM B 168
EN 2.4851
UNS N06601
Werkstoff 2.4851

Inventory

601 Coil, 601 Pipe, 601 Plate, 601 Sheet

Common Trade Names

Alloy 601, Inconel® 601, Nickel 601

Features

  • Outstanding oxidation resistance to 2200°F
  • Highly resistant to carburization
  • Good creep and rupture strength
  • Metallurgical stability

Applications

  • Copper brazing, annealing and sintering muffles and retorts
  • Radiant tubes
  • Strand annealing tubes
  • Steam superheater tube supports
  • Rotary kilns and calciners
  • Thermocouple protection tubes

Physical Properties

Density: 0.293 lb/in3
Melting Point: 2375 - 2495°F

Temperature, °F 70 1000 1200 1400 1600 1800 2000
Coefficient* of Thermal Expansion, in/in°F x 10-6 - 8.5 8.9 9.2 9.5 9.8 10.2
Thermal Conductivity
Btu • ft/ft2 • hr • °F
6.5 11.6 12.7 13.7 14.8 15.8 16.9
Modulus of Elasticity, Dynamic psi x 106 29.95 25.43 24.12 22.48 20.54 18.43 16.20

* 70°F to indicated temperature.

Mechanical Properties

Short-Time Elevated Temperature Tensile Properties

Temperature,°F 70 1000 1200 1400 1600
Ultimate Tensile Strength, ksi 100 90 60 34 18
0.2% Yield Strength, ksi 54 48 41 26 15
Elongation, % 45 44 45 70 120

Typical Creep - Rupture Properties

Temperature, °F 1400 1600 1800 2000
Minimum Creep 0.0001%/Hour, ksi 4.1 2.0 0.76 0.43
10,000 Hour Rupture Strength, ksi 6.2 2.6 1.2 0.62*

* Extrapolated

INCONEL® and INCOLOY® are registered trademarks of Special Metals (PCC)