UGIMA® 4509 Annealed
UGIMA® 4509 Annealed introduction
UGIMA® 4509 is an improved machinability ferritic stainless steel containing approximately 18% chromium and stabilised with niobium and titanium.
Apart from good corrosion resistance, this grade is characterised by its high suitability for different methods of working, such as machining, cold heading and welding:
This UGIMA® version of 4509 makes it possible to achieve significantly greater machining productivity than that obtained with a standard 4509, thanks to slower tool wear and better chip breakability.
Stabilisation with niobium eliminates the risk of sensitisation during welding and the titanium limits the grain size in welded areas.
It has excellent cold-heading properties.
For some applications, it is an economical replacement for certain austenitic grades such as 1.4307 or 1.4305.
Its ferritic structure ensures excellent ferromagnetic properties, good oxidation resistance (in particular to thermal cycles) and an expansion coefficient similar to that of carbon steel.
The structure of UGIMA® 4509 is entirely ferritic in the as-delivered condition. The main precipitates are Nb-carbonitrides, Ti-nitrides and Ti-sulphides or Ti-carbosulphides.
Equivalent material: DIN 1.4509, DIN X2CrNbTi18, UNS S43940, ASTM S43940, JIS SUS430LX, ISO 4509-439-40-X, ISO X2CrNbTi18, EN 1.4509, EN X2CrNbTi18
UGIMA® 4509 Annealed general
| Property |
Value |
| Density |
Density of 7.7 g/cm³ |
UGIMA® 4509 Annealed thermal
| Property |
Value |
Comment |
| Coefficient of thermal expansion |
Coefficient of thermal expansion of 0.000010 1/K |
20 to 100°C, 20 to 200°C |
| - |
Coefficient of thermal expansion of 0.0000105 1/K |
20 to 300°C, 20 to 400°C |
| Specific heat capacity |
Specific heat capacity of 460 J/(kg·K) |
- |
| Thermal conductivity |
Thermal conductivity of 25 W/(m·K) |
- |
UGIMA® 4509 Annealed chemical
| Property |
Value |
Comment |
| Carbon |
Carbon of 0.03 |
max. |
| Chromium |
Chromium of 17.5 - 18.5 % |
- |
| Manganese |
Manganese of 1.0 |
max. |
| Niobium |
Niobium of 0.7000000000000001 |
max., min: 0.30+(3xC) |
| Nitrogen |
Nitrogen of 0.03 |
max. |
| Phosphorus |
Phosphorus of 0.03 |
max. |
| Silicon |
Silicon of 1.0 |
max. |
| Sulfur |
Sulfur of 0.015 |
max. |
| Titanium |
Titanium of 0.1 - 0.30000000000000004 % |
- |
UGIMA® 4509 Annealed electrical
| Property |
Value |
| Electrical resistivity |
Electrical resistivity of 6e-07 Ω·m |
UGIMA® 4509 Annealed mechanical
| Property |
Temperature |
Value |
Comment |
| Elastic modulus |
20 °C |
Elastic modulus of 220 GPa |
- |
| - |
100 °C |
Elastic modulus of 215 GPa |
- |
| - |
200 °C |
Elastic modulus of 210 GPa |
- |
| - |
300 °C |
Elastic modulus of 205 GPa |
- |
| - |
400 °C |
Elastic modulus of 195 GPa |
- |
| Elongation |
- |
Elongation of 18 % |
min |
| Hardness, Brinell |
- |
Hardness, Brinell of 200.0 |
max. |
| Tensile strength |
- |
Tensile strength of 420.0 - 620.0 MPa |
- |
UGIMA® 4509 Annealed application
| Property |
- |
- |
| Application areas |
| Cold Forming |
| Corrosion properties |
Grade |
Pitting potential (mV/SCE) |
Standard deviation |
| UGI 4509 |
484
|
3 |
| UGIMA® 4509 |
447 |
8 |
| UGIMA® 4511 |
360 |
20 |
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