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UGIMA® 4571 Annealed – Superior Machinability Stainless Steel

UGIMA® 4571 is an improved machinability stainless steel manufactured only by Ugitech.

Its properties are identical to those of 4571 except for its machinability, which is even better than that of 4571:

  • UGIMA® 4571's new technological advances are extremely advantageous, whatever the machining conditions, machine or tooling used.
  • Productivity increases of 15 to 30% over grade 4571, the current market standard, have been obtained.


    Non-magnetic in annealed condition. Slight magnetism is produced by cold-working operations

    Properties

    General

    PropertyValue

    Density

    7.9 g/cm³

    Mechanical

    PropertyValue

    Elastic modulus

    200 GPa

    Elongation

    56 %

    Reduction of area

    72.0 %

    Tensile strength

    560 MPa

    Thermal

    PropertyValueComment

    Coefficient of thermal expansion

    0.0000168 1/K

    20 to 200°C

    Thermal conductivity

    15 W/(m·K)

    Electrical

    PropertyValue

    Electrical resistivity

    7.4e-07 Ω·m

    Chemical properties

    PropertyValueComment

    Carbon

    0.05

    max.

    Chromium

    16.5 - 18.5 %

    Manganese

    2.0

    max.

    Molybdenum

    2.0 - 2.5 %

    Nickel

    10.5 - 11.5 %

    Phosphorus

    0.045

    max.

    Silicon

    1.0

    max.

    Sulfur

    0.015 - 0.03 %

    Titanium

    0.7000000000000001

    max., min: 5xC

    Technological properties

    Property
    Corrosion properties

    UGIMA® 4571 has excellent ability to withstand corrosion.

  • In natural environments: Water, rural and urban atmospheres, industrial atmospheres and even in the presence of moderate concentrations of chlorides and acids
  • In food processing and agricultural environments
  • In numerous acid (sulphuric, phosphoric and organic) and chloride chemical environments, under certain temperature and concentration conditions. UGIMA® 4571 is resistant to inter-granular corrosion in the same way as 1.4571. UGIMA® 4571 is pickled in the same way as 1.4571 grade steel.


    Remark: The corrosion resistance of a stainless steel depends on many factors related to the composition of the corrosive atmosphere (chloride concentration, presence or absence of oxidising agents, temperature, pH, agitation or no agitation, and so on), as well as to the preparation of the material (surfaces free from metal particles, surface finish, such as hardening, polishing, and so on). Precautionary measures should be taken for certain tests such as the saline mist test (French standard NFX 41002): for example marking labels (that might cause corrosion run-outs and reduce the test resistance time) should not be used on the sample.

    The table below illustrates a performance scale (with three levels: good/average/excellent) in different environments:


    EnvironmentBehavior
    Nitric acidGood
    Phosphoric acidAverage
    Sulphuric acidAverage
    Acetic acidGood
    Sodium carbonateAverage
    NaCl (Saline mist)Good
    HumidityExcellent
    PetroleumAverage
    Sea waterAverage

    • General machinability

    UGIMA® 4571 offers improved machining performance as a result of the optimization of the inclusion population. This expands the range of cutting conditions suited to the production of machined parts. The productivity gains brought by this new grade are derived from extended tool life, good chip breakability and good surface finish.


    If you would like to use the grade to best advantage for your components and working environment, contact our Technical service via your usual commercial contact.

    Heat Treatment

    The annealing treatment that gives UGIMA® 4571 its lowest properties includes heating to 1020°C - 1120°C, followed by rapid air or water cooling.

    Hot forming

    Forging:

  • Heating temperature: 1150 - 1200°C
  • Forging temperature: between 1200°C and 950°C
  • Air cooling (or water cooling if deformation is not a problem)

    • Other

    Available products:


    ProductFormTolerance
    Hot rolled and cold finished barsRound13 to 9
    BarsHexagonal11


    Do not hesitate to contact the supplier for further information

    Welding

    UGIMA® 4571 can be MIG or TIG welded, with or without filler material, using laser or resistance welding techniques.

    When using filler wire, we recommend using ER318 (Nb stabilised). For cold applications, ER316LSi wire can also be used.

    To minimize thermal cracking problems, tight control over welding parameters is required. To do this, always ensure when using arc welding that the linear welding power is limited.


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