UGI 4418 AIR Annealed
UGI 4418 AIR Annealed introduction
UGI 4418 AIR stainless steel is a low-carbon super-martensitic grade with the addition of nickel. It is specifically designed for the aerospace market. It combines high mechanical strength with excellent resilience and very good corrosion resistance, considerably higher than those of conventional high-carbon Fe-Cr-C martensitic steels. This grade exhibits excellent cryogenic properties.
In the quenched and tempered state, the UGI 4418 AIR microstructure consists predominantly of tempered martensitic (see figure on the right side of the material page). It may contain traces of ferrite (less than 5%) and residual austenite, depending on the diameter and the heat treatments used.
The microcleanliness guarantees are as follows (rating as per ASTM E45/method A):
Grades
Epit (mV/ECS) ± 20 mV
1.4006 (AISI 410)
185
1.4307 (AISI 304L) (with S=0.02%)
400
1.4542 (17-4-PH AISI 630)
380
1.4418
375
UGI 4418 AIR is also available in an electro-slag-remelted (ESR) version.
UGI 4418 AIR is magnetizable.
Equivalent material: EN 1.4418, EN X4CrNiMo16-5-1, DIN 1.4418, DIN X4CrNiMo16-5-1, ISO 4418-431-77-E, AFNOR Z8CND17-04
UGI 4418 AIR Annealed general
| Property |
Value |
| Density |
Density of 7.7 g/cm³ |
UGI 4418 AIR Annealed thermal
| Property |
Value |
Comment |
| Coefficient of thermal expansion |
Coefficient of thermal expansion of 0.0000103 1/K |
20 to 100°C |
| - |
Coefficient of thermal expansion of 0.0000108 1/K |
20 to 200°C |
| - |
Coefficient of thermal expansion of 0.0000112 1/K |
20 to 300°C |
| - |
Coefficient of thermal expansion of 0.0000116 1/K |
20 to 400°C |
| Specific heat capacity |
Specific heat capacity of 430 J/(kg·K) |
- |
| Thermal conductivity |
Thermal conductivity of 15 W/(m·K) |
- |
UGI 4418 AIR Annealed chemical
| Property |
Value |
Comment |
| Carbon |
Carbon of 0.06 |
max. |
| Chromium |
Chromium of 15.0 - 17.0 % |
- |
| Copper |
Copper of 0.5 |
max. |
| Manganese |
Manganese of 1.5 |
max. |
| Molybdenum |
Molybdenum of 0.8 - 1.2 % |
- |
| Nickel |
Nickel of 4.0 - 5.0 % |
- |
| Nitrogen |
Nitrogen of 0.02 % |
min. |
| Phosphorus |
Phosphorus of 0.03 |
max. |
| Silicon |
Silicon of 0.6000000000000001 |
max. |
| Sulfur |
Sulfur of 0.005 |
max. |
UGI 4418 AIR Annealed electrical
| Property |
Value |
| Electrical resistivity |
Electrical resistivity of 8e-07 Ω·m |
UGI 4418 AIR Annealed mechanical
| Property |
Temperature |
Value |
Comment |
| Elastic modulus |
20 °C |
Elastic modulus of 200 GPa |
- |
| - |
100 °C |
Elastic modulus of 195 GPa |
- |
| - |
200 °C |
Elastic modulus of 185 GPa |
- |
| - |
300 °C |
Elastic modulus of 175 GPa |
- |
| - |
400 °C |
Elastic modulus of 170 GPa |
- |
| Hardness, Brinell |
- |
Hardness, Brinell of 293.0 |
max., d≤200mm |
UGI 4418 AIR Annealed application
| Property |
- |
- |
| Application areas |
| Cold Forming |
| Corrosion properties |
Grade |
Pitting potential |
| - |
(mV/ECS at ± 20 mV) |
| 1.4006 (410) |
185 |
| 1.4307 (304L) |
400 |
| 1.4542 (17-4PH) |
380 |
| UGI 4418 AIR |
375 |
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