Cobalt-based casting rod (UNS R30031 (HY Co31/ Stellite 31)

HY Co31（UNS R30031)

Introduction:

HY Co31 Material grades and equivalents: Stellite 31/ UNS R30031

This chapter  is mainly introduced HY Co31 Datasheet, including chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of Stellite 31,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.

    Category:

    Description

    HY Co31（ UNS R30031 )

    HY Co31 Material grades and equivalents: Stellite 31/ UNS R30031

    HY Co31（UNS R30031 / Stellite 31 ） is a cobalt base superalloy (CoCrNiW) with high wear and corrosion resistance, excellent stress-rupture properties, resistance to thermal and mechanical shock and corrosion resistance. It is commonly used in the hottest sections of industrial gas turbines.

    Chemical composition:

    Co

    Cr

    W

    C

    Ni

    Fe

    Si

    Mn

    Min.(%)

    Bal.

    24.5

    7

    0.45

    9.5

    2.0

    1.0

    1.0

    Max.(%)

    Bal.

    26.5

    8

    0.55

    11.5

    Mechanical properties:

    Yield

    Tensile

    Impact

    Elongation

    Reduction in cross section on fracture

    As-Heat-Treated Condition

    Brinell hardness (HBW)

    Rp0.2 (MPa)

    Rm (MPa)

    KV/Ku (J)

    A (%)

    Z (%)

    563 (≥)

    164 (≥)

    14

    12

    14

    Solution and Aging, Annealing, Ausaging, Q+T,etc

    422

    ASME/AWS

    Hardness(HRC)

    –

    20-35

    HY Co31（UNS R30031)

    Product type

    Products

    Dimension

    Processes

    Deliver Status

    Plates / Sheets

    Plates / Sheets

    0.08-200mm(T)*W*L

    Forging, hot rolling and cold rolling

    Annealed, Solution and Aging, Q+T, ACID-

    WASHED, Shot Blasting

    Steel Bar

    Round Bar, Flat Bar, Square Bar

    Φ8-1200mm*L

    Forging, hot rolling and cold rolling, Cast

    Black, Rough Turning, Shot Blasting,

    Coil / Strip

    Steel Coil /Steel Strip

    0.03-16.0x1200mm

    Cold-Rolled & Hot- Rolled

    Annealed, Solution and Aging, Q+T, ACID-

    WASHED, Shot Blasting

    Pipes / Tubes

    Seamless Pipes/Tubes, Welded Pipes/Tubes

    OD:6-219mm x WT:0.5-20.0mm

    Hot extrusion, Cold Drawn, Welded

    Annealed, Solution and Aging, Q+T, ACID- WASHED

    Characteristic as below：

    HY Co31（UNS R30031/ Stellite 31) is a cobalt-base, high-temperature super alloy having high tensile and creep properties in pre-cision casting. It is superior in stress-rupture properties to most alloys commercially available, especially at 1700 and 1800°F.

    Processing conditions and application:

    HY Co31（UNS R30031/ Stellite 31) is mainly used in gas turbine engines in areas subject to hot gas erosion.

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