UGIMA®-X 4305 Cold Drawn

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UGIMA®-X 4305 is a stainless steel of highly improved machinability manufactured only by Ugitech.

Its properties are identical to those of other 1.4305s except for its machinability, which is even better than that of UGIMA® 4305, the 1.4305 grade from Ugitech with already improved machinability.

  • UGIMA®-X 4305 is a stainless steel resulting from an improved production and control process in the UGIMA® population developed by Ugitech.
  • UGIMA®-X 4305 represents a technological advance which has advantages whatever the machining conditions, machinery or tools used, its machinability is optimal at high cutting conditions.

  • Compared to UGIMA® 4305, increases of 15% have been achieved in turning. This ranks it slightly ahead of UGIMA® 4305 HM, with fewer detrimental effects such as the cold cracking phenomenon thanks to its lower sulfur content.

    Related Standards

    Equivalent Materials

    This material data has been provided by Ugitech SA.

    "Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
    All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
    Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

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    7.9 g/cm³

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    Elastic modulus

    196 GPa

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    26.0 - 47.0 %

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    Reduction of area

    37.0 - 56.0 %

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    Tensile strength

    685.0 - 850.0 MPa

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    Coefficient of thermal expansion

    0.0000168 1/K

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    20 to 200°C

    Specific heat capacity

    500 J/(kg·K)

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    Thermal conductivity

    15.3 W/(m·K)

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    Electrical resistivity

    7.3e-07 Ω·m

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    Chemical properties




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    17.0 - 18.0 %

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    8.0 - 10.0 %

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    0.25 - 0.35000000000000003 %

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    Technological properties

    Application areas

  • General component production
  • Food-processing and agricultural industries
  • Decorating and household equipment
  • Building and construction, transport
  • Electronic equipment

  • Corrosion properties

    UGIMA®-X 4305 has an excellent ability to withstand corrosion in many environments. Its corrosion resistance is typical of an austenitic steel and is similar to that of 4305 / 303 in every respect.

  • However, UGIMA®-X 4305 is not recommended for use in marine environments and highly oxidizing chemical environments.
  • In addition, as with all high sulfur content stainless steels, special care must be taken when using UGIMA®-X 4305 in acid or chloride environments that are liable to pitting and crevice corrosion; it should not be used where components are shaped in such a way as to form areas where corrosive products might collect and corrode.

  • EnvironmentBehavior
    Nitric acidGood
    Phosphoric acidAverage
    Sulfuric acidAverage
    Acetic acidAverage
    Sodium carbonateAverage
    NaCl (Saline mist)Average
    Sea waterRestricted use

    The use of UGIMA®-X 4305 is compatible with all the fluids, lubricants, oils and greases used in the machining industry. Optimum corrosion resistance is obtained where a surface is free from all residual machining oil or foreign particles (iron for example).

    UGIMA®-X 4305 is pickled in the same way as 304 grade steel.

    The decontamination of steels with a high sulfur content is not recommended owing to the complexity and cost of this operation; however, if this is necessary, the recommended decontamination / passivation process is as follows:

  • 1 volume 52% nitric acid (36° Baumé)
  • 1 volume water
  • at room temperature
  • short duration
  • wash carefully when the process is completed

    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 oxidizing 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 (ISO 9227): for example marking labels (that might cause corrosion run-outs and reduce the test resistance time) should not be used on the sample.

  • General machinability

    Due to the specific optimization of the entire oxide population in the grade, UGIMA®-X 4305 guarantees exceptional machinability performances, even for a 1.4305 grade. Such performances are provided especially in very high or severe cutting conditions.

    Its performance is based on very good chip breaking, increased tool service lives and very good surface finish after machining.

    To obtain the maximum benefit from the potential of this grade, in terms of parts and working environment, contact our Technical Support Department.



    In terms of tool insert wear (VB15/0.15 tests, representative of the potential rough turning productivity), the accessible cutting conditions of UGIMA®-X 4305 increase by nearly 15% compared with the already improved UGIMA® 4305; this therefore ranks it slightly higher than UGIMA® 4305HM but with less sulfur so fewer detrimental effects like the cold cracking phenomenon. The VB15/0.15 test results obtained with SECO TM2000 CNMG 120408-MF4 inserts are shown in the chart on the right side of the material page.

    Chip Breaking Zones (CBZ):

    In terms of chip breakability (CBZ tests, representative of the ability of the metal to limit machine downtime due to chips becoming entangled around the tools), the number of short chip cutting conditions for UGIMA®-X 4305 is slightly increased compared to those obtained with the already improved UGIMA® 4305 and UGIMA® 4305HM. This is shown in the following chart, which indicates the number of machining conditions (average values from several tests) producing short, medium and long chips (among those tested*) for the SECO TM2000 CNMG 120408-MF4 turning insert for each stainless steel grade tested (see the chart on the right side of the material page).

    * the conditions tested are as follows: at a constant cutting speed (300 m/min), the feed rate "f" is varied from 0.1 mm to 0.4 mm/rev in increments of 0.05 mm/rev, and the cutting depth "ap" is varied from 0.5 mm to 4 mm in increments of 0.5 mm; fifty-six conditions were tested using this method.

    Heat Treatment

    The heat treatment of UGIMA®-X 4305 consists of quenching the metal in water or air after keeping it for an extended period (at least half an hour) at a high temperature of between 1000 and 1100°C. This solution annealing heat treatment enables all traces of cold drawing to be removed whilst providing the steel with its lowest level of mechanical properties.


    Available products:

    ProductShapeSurface finishToleranceDimensions

    RoundRolled and descaled12 to 1322 to 130 mm
    RoundTurned and polished9 to 1122 to 130 mm
    RoundDrawn8 to 91.8 to 55 mm
    RoundGround7 to 91.8 to 80 mm
    HexagonalDrawn113 to 55 mm
    Drawn wireRoundMat1 to 14 mm

    Other products: contact the supplier


    Like all austenitic stainless steels with a high sulfur content, UGIMA®-X 4305 must be welded with care to avoid hot cracking phenomena occurring in the HAZ as well as in the WM (especially when no filler wire is used).

    In arc welding (GMAW, GTAW, etc.), reducing the heat input can be very helpful in avoiding hot cracking phenomena by enabling faster cooling, which limits the sulfur segregation in the HAZ/WM responsible for hot cracking. If a welding filler wire is required, ER312 filler wire can be a good solution to lower the risk of hot cracking in the WZ.

    Laser welding of UGIMA®-X 4305 is very difficult, as is the case for all the high-sulfur austenitic stainless steel grades like 1.4305. Laser welding should therefore be avoided if possible.

    No heat treatment is required after welding.