Show Supplier Material materials with Density of 7.9 g/cm³
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50.0 - 65.0 %
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Reduction of area
60.0 - 75.0 %
Show Supplier Material materials with Reduction of area of 60.0 - 75.0 %
570.0 - 650.0 MPa
Show Supplier Material materials with Tensile strength of 570.0 - 650.0 MPa
Coefficient of thermal expansion
Show Supplier Material materials with Coefficient of thermal expansion of 0.0000168 1/K
20 to 200°C
Specific heat capacity
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17.0 - 18.0 %
Show Supplier Material materials with Chromium of 17.0 - 18.0 %
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8.0 - 10.0 %
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0.25 - 0.35000000000000003 %
Show Supplier Material materials with Sulfur of 0.25 - 0.35000000000000003 %
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.
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:
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.
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.
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.
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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.