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Alloy 601

  • Material

    Alloy 601, UNS N06601, W.Nr. 2.4851

  • Overview

    Alloy 601 is a nickel-chromium-iron alloy with additions of aluminum and titanium.


    Alloy 601 is specifically recommended for service above 550°C (1022°F) because of its higher creep-rupture properties resulting from its controlled carbon content and coarse grain size.


    Alloy 601 is a general-purpose engineering material for applications that require resistance to heat and corrosion. An 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 alloy's nickel base, in conjunction with substantial chromium content, provides resistance to many corrosive media and high- temperature environments. Oxidation resistance is further enhanced by the aluminum content.

  • Application

    The properties of Alloy 601 make it a material of broad utility in such fields as thermal processing, chemical processing, pollution control, aerospace, and power generation.


    Alloy 601 is a standard material of construction for various types of thermal-processing equipment. Industrial-heating applications include baskets, trays, and fixtures for annealing, carburizing, carbonitriding, nitriding and other heat-treating operations. In industrial furnaces, the alloy is used for radiant tubes, muffles, retorts, flame shields, strand-annealing tubes, woven-wire conveyor belts, chain curtains, burner nozzles, and electrical resistance heating elements. Other thermal-processing applications are thermocouple protection tubes, furnace-atmosphere generators, and infrared radiant screens.

  • Chemical Composition (wt%)

    Material

    Fe

    Ni

    Cu

    Cr

    Al

    C

    Alloy 601

    Balance

    58.0-63.0

    ≤1.0

    21.0-25.0

    1.0-1.7

     ≤0.10

    Material

    Mn

    Si

    P

    S

    Ti

    B

    Alloy 601

    ≤1.0

    ≤0.50

     ≤0.020

    ≤0.015

    ≤0.5

    ≤0.006

  • Mechanical Property

    Material

    Tensile strength

    MPa

    Yield strength at

    0.2 offset MPa

    Elongation in 2”

    % min.

    Reduction of area

    % min.

    Alloy 601

    ≥550

    ≥205

    ≥30


  • Corrosion Resistance

    Alloy 601 is termed a heat resistant alloy on account of its excellent resistance above 550°C (1022°F) against hot gases and combustion products, as well as against molten salt, while at the same time exhibiting good mechanical short-time and long-term properties. Even under severe conditions, such as under cyclic heating and cooling, alloy 601 retains a tightly adherent oxide layer which is very resistant to spalling.


    The maximum operating temperature of alloy 601 in air is 1200°C (2192°F), while the loss of weight from scaling is not higher than 1 g/m2 • h on average.

  • Available Process

    (1) Hot formed, solution annealed, descaled

    (2) Cold worked and bright annealed

    (3) Cold worked, bright annealed, polished (MP, EP etc.)

  • Common Tests

    Chemical composition

    Tension

    Hardness

    Flaring

    Flange

    Flattening

    Micro structure

    Hydrostatic

    NDT

    Intergranular Corrosion

    Surface condition

    Shape and dimension

    Positive Material Identification

  • Product Forms

    Form

    Size range

    Capillary tube

    OD 0.08 ~ 6.0 mm

    WT 0.015 ~ 1.5 mm

    Thin wall & Ultra thin wall seamless tube

    OD6.0 ~80.0 mm

    WT 0.05 ~4.5 mm

    Micro ID and heavy thick wall seamless tube

    OD3.0 ~50.0 mm

    ID 0.30 ~5.0 mm

    Precision conic seamless tube

    Bigger end: OD3.0 - 426.0mm

    Smaller end: OD2.5 - 346.0mm

    WT: 0.15 - 40.0mm

    HP /UHP BA+ tube

    EP tube

    OD 1.0 ~ 76 mm

    WT 0.10 ~ 10.0 mm

    Small caliber precision seamless tube

    OD6.0 ~89 mm

    WT 0.50 ~9.0 mm

    Profiled seamless tube

    Build to drawing

    Build to specification

    Bourdon tube

    Y40, Y50, Y60, Y70, Y100, Y150

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