UGIMA® 4598 Cold Work Hardened

UGIMA® 4598 Cold Work Hardened

UGIMA® 4598 Cold Work Hardened introduction

UGIMA® 4598 uses the base stainless steel type 1.4404 / 316L with the addition of sulphur (>0.1%) and copper (1.5%) to significantly improve its machinability. In addition, UGIMA® 4598 benefits from the UGIMA® manufacturing process that ensures even better machinability. The addition of copper partly compensates for the reduced corrosion resistance which can be expected from the higher sulphur level.


In the as-delivered condition, the microstructure of UGIMA® 4598 is austenitic with elongated sulphides in the hot-rolling direction and traces of residual ferrite (
UGIMA® 4598 may exhibit weak residual ferromagnetism due to the presence of ferrite (≤ 1%) and, on significantly cold work-hardened products, strain-induced martensite.

Equivalent material: EN 1.4598, DIN 1.4598

UGIMA® 4598 Cold Work Hardened general

Property Value
Density Density of 8 g/cm³

UGIMA® 4598 Cold Work Hardened thermal

Property Value Comment
Coefficient of thermal expansion Coefficient of thermal expansion of 0.0000165 1/K 20 to 100°C
- Coefficient of thermal expansion of 0.0000173 1/K 20 to 200°C
- Coefficient of thermal expansion of 0.0000177 1/K 20 to 300°C
- Coefficient of thermal expansion of 0.0000181 1/K 20 to 400°C
- Coefficient of thermal expansion of 0.0000184 1/K 20 to 500°C
Specific heat capacity Specific heat capacity of 500 J/(kg·K) -
Thermal conductivity Thermal conductivity of 15 W/(m·K) -

UGIMA® 4598 Cold Work Hardened chemical

Property Value Comment
Carbon Carbon of 0.03 max.
Chromium Chromium of 16.5 - 18.5 % -
Copper Copper of 1.3 - 1.8 % -
Manganese Manganese of 2.0 max.
Molybdenum Molybdenum of 2.0 - 2.5 % -
Nickel Nickel of 11.0 - 13.0 % -
Phosphorus Phosphorus of 0.04 max.
Silicon Silicon of 1.0 max.
Sulfur Sulfur of 0.1 - 0.18 % -

UGIMA® 4598 Cold Work Hardened electrical

Property Value
Electrical resistivity Electrical resistivity of 7e-10 Ω·m

UGIMA® 4598 Cold Work Hardened mechanical

Property Temperature Value Comment
Charpy impact energy, V-notch - Charpy impact energy, V-notch of 100 J min.
Elastic modulus 20 °C Elastic modulus of 200 GPa -
- 100 °C Elastic modulus of 194 GPa -
- 200 °C Elastic modulus of 186 GPa -
- 300 °C Elastic modulus of 179 GPa -
- 400 °C Elastic modulus of 172 GPa -
- 500 °C Elastic modulus of 165 GPa -
Elongation - Elongation of 15.0 - 25.0 % min., depending on the size
Tensile strength - Tensile strength of 500.0 - 930.0 MPa min., depending on the size

UGIMA® 4598 Cold Work Hardened application

Property - -
Application areas
Cold Forming
Corrosion properties
General machinability
Heat Treatment
Hot forming
Other Product Shape Finish Tolerance Dimensions
Rolled and descaled bars Round
12 to 13 22 to 130
Cold-finished drawn, turned, ground bars Round
6 to 11 2 to 130
Drawn bars Hexagonal
11 3 to 60
Drawn wire Round


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