UGIMA®-X 4404 Solution Annealed

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UGIMA®-X 4404 is a stainless steel of highly improved machinability manufactured only by Ugitech.

Its properties are identical to those of other 1.4404s except for its machinability, which is even better than that of UGIMA® 4404 and UGIMA® 4404 HM, the 1.4404 grades from Ugitech with already improved machinability:

  • UGIMA®-X 4404 is a stainless steel resulting from an improved production and control process in the inclusive UGIMA® population developed by Ugitech.
  • UGIMA®-X 4404 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 the UGIMA® 4404, the grade already improved in terms of machinability, increases of 15% and 20% have been achieved in turning and drilling respectively, and compared to UGIMA® 4404 HM turning is increased by 7% and drilling increased by 12 %.

  • Like most austenitic stainless steels, UGIMA®-X 4404 is almost non-magnetic after a solution annealed heat treatment. However, after cold drawing, mild ferromagnetic behavior may be observed due to the destabilization of the austenite.

    Equivalent Materials

    This material data has been provided by Ugitech SA.

    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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    45 %

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    Reduction of area

    70.0 %

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    Tensile strength

    500.0 - 600.0 MPa

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    Coefficient of thermal expansion

    0.0000165 1/K

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    20 to 200°C

    Specific heat capacity

    500 J/(kg·K)

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    Thermal conductivity

    15 W/(m·K)

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    Electrical resistivity

    7.5e-07 Ω·m

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    Chemical properties




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    16.5 - 17.5 %

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    Show Supplier Material materials with Copper of 0.75




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    2.0 - 2.5 %

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    10.0 - 12.0 %

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    Show Supplier Material materials with Phosphorus of 0.04




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    0.02 - 0.03 %

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    Technological properties

    Application areas

  • General component production
  • Chemical industry
  • Oil, petrochemical and nuclear industries
  • Food-processing and agricultural industries
  • Decorating and household equipment
  • Building and construction, Transport
  • Electronic equipment
  • Corrosion properties

    UGIMA®-X 4404 has the same corrosion resistance as UGIMA® 4404. It therefore has excellent corrosion resistance in natural atmospheres: watercourses, rural and urban atmospheres, industrial atmospheres, even in the presence of moderate concentrations of chlorides and acids, in food and farm-produce environments and in numerous acid (sulfuric, phosphoric and organic) and chlorinated atmospheres, under certain temperature and concentration conditions.



    Nitric acid


    Phosphoric acid


    Sulfuric acid


    Acetic acid




    NaCl (Saline mist)








    UGIMA®-X 4404 effectively resists intergranular corrosion even after welding and passes the standardized tests:

  • AFNOR NFA05-159,
  • ASTM A262 – 75 PRACTICE E,
  • DIN 50914,
  • And, on request, special tests.

    UGIMA®-X 4404 can be used in marine environments and in highly oxidizing chemical atmospheres.

    The use of UGIMA®-X 4404 is compatible with all fluids, lubricants, oils and greases applied in industry and machining. Optimum corrosion resistance is achieved on a surface free from residual machining oils or foreign particles (iron, for example).

    The pickling of UGIMA®-X 4404 is comparable to that of a standard 1.4404 such as UGI® 4404.

    The decontamination of steels is not recommended because of the complexity and cost of this operation; however, if this is necessary, the recommended decontamination / passivation treatment is as follows:

  • 1 volume nitric acid 52% (36° Baumé)
  • 1 volume water
  • at room temperature
  • short duration
  • finish with thorough washing

  • The corrosion resistance of a stainless steel depends on a number of factors, both in terms of the composition of the aggressive atmosphere (chloride concentration, presence or absence of oxidants, temperature, pH, whether or not there is agitation, etc.) and in terms of the material (surfaces free from ferrous particles, surface condition such as cold drawing, polishing, etc.). Precautionary measures must also be taken for certain tests, e.g. for saline mist (ISO 9227): for example, the use of marking labels placed on the sample must be avoided as these could cause corrosion run-outs and minimize the duration of resistance in the test.

    General machinability

    Due to specific optimization of the entire oxide population in the grade, UGIMA®-X 4404 guarantees exceptional machinability performances for a 1.4404. 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 4404 increase by nearly 15% compared with the already improved UGIMA® 4404. The VB15/0.15 tests 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 4404 is slightly increased compared to those obtained with the already improved UGIMA® 4404 and UGIMA® 4404HM. This is shown in the charts on the right side of the material page, which indicate the number of machining conditions producing short, medium and long chips (among those tested*) for two reference turning inserts and 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 (200 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.


    To compare UGIMA®-X 4404 to the other 1.4404 grades in drilling, tests were carried out using coated carbide drills of ∅6 mm, with central coolant (soluble oil at 15 bars). Tests were carried out at 4D (24mm depth) for different drilling conditions in order to find the domain (in terms of cutting speed and feed rates) in which 550 holes could be drilled with a drill without breaking it. The wider the domain, the better the grade. Maximum chip flow rates were consequently defined in line with the better productivity in obtaining the 550 holes with one drill. The higher this flow rate, the better the grade. UGIMA®-X 4404 has a wider domain than that of UGI® 4404, even the already highly improved UGIMA® 4404HM; Because of this, the maximum chip flow rate of UGIMA®-X 4404 is improved by 12%, 20% and 30% compared to UGIMA® 4404 HM, UGIMA® 4404 and UGI® 4404 respectively, as shown in the chart on the right side of the material page.

    Heat Treatment

    The heat treatment of UGIMA®-X 4404 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.

    Hot forming


    The forging of UGIMA®-X 4404 pose no particular problems:

  • Heating without special precautions up to 1150°-1180°C.
  • Forging between 1180°C and 950°C (the best results being obtained between 1100 and 1180°C).
  • Cooling in air or water, if no deformation is feared. Priority will be given to cooling in water for high charges (avoid cooling stacked forgings in air).
  • Other

    Available products:

    ProductShapeSurface finishToleranceDimensions
    BarRoundRolled 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


    UGIMA®-X 4404 can be welded without undue difficulty, with or without welding filler wire. If a welding filler wire is required, use grades E316L (coated electrodes), ER316L (GTAW), or ER316LSi (GMAW).

    In GMAW or GTAW welding, to avoid any risks of hot cracking, welding heat input should be limited (to avoid the sulfur segregation responsible for the hot cracking phenomena occurring during weld pool cooling). However, for laser welding, welding heat input must be maximized (to avoid too rapid cooling which brings about hot cracking of the welds by austenitic solidification).

    No heat treatment is required after welding.