UGI® 4545 AIR H900
UGI® 4545 AIR H900 introduction
UGI® 15-5PH AIR or UGI® 4545 AIR is a PH (Precipitation Hardening) martensitic stainless steel of premium quality, mainly designed for aerospace purposes. It is used for parts requiring a combination of high strength and high toughness. This grade also presents a good resistance to fatigue failure. This is an Electro-Slag Remelted material (according to AMS 5659 type 2) using the most advanced technology in this field. This elaboration allows a good homogeneity and isotropy of the structure and high mechanical properties in longi-tudinal but also transverse direction. (Ferromagnetic)
The microstructure observed in optical microscopy is composed of homogenous martensite with niobium car-bonitride precipitates (white particle visible in SEM), and retained austenite whose fraction depends on the metallurgical condition. The nanometric precipitation Cu rich phase can be observed under
TEM. UGI® 15-5PH AIR presents a delta-ferrite fraction inferior to 1% (lower than UGI® 17-4PH AIR) according to AMS 2315, and a former austenite grain size finer or equal to 6.
UGI® 15-5PH AIR is produced by consumable ESR. The remaining inclusions are very small and are evenly distributed in the section. The following micro-cleanliness, according to ASTM E45/A is guaranteed: A,B,C,D (Thin)
Equivalent material: EN X5CrNiCu15-5, EN 1.4545, DIN X5CrNiCu15-5, DIN 1.4545, UNS S15500, ASTM XM12, ASTM S15500, 15-5PH, AFNOR E-Z5CNU15
UGI® 4545 AIR H900 general
| Property |
Value |
| Density |
Density of 7.8 g/cm³ |
UGI® 4545 AIR H900 thermal
| Property |
Value |
Comment |
| Coefficient of thermal expansion |
Coefficient of thermal expansion of 0.0000105 1/K |
20 to 100°C |
| - |
Coefficient of thermal expansion of 0.0000111 1/K |
20 to 200°C |
| - |
Coefficient of thermal expansion of 0.0000115 1/K |
20 to 300°C |
| - |
Coefficient of thermal expansion of 0.0000119 1/K |
20 to 400°C |
| Specific heat capacity |
Specific heat capacity of 500 J/(kg·K) |
- |
| Thermal conductivity |
Thermal conductivity of 16 W/(m·K) |
- |
UGI® 4545 AIR H900 chemical
| Property |
Value |
Comment |
| Carbon |
Carbon of 0.07 |
max. |
| Chromium |
Chromium of 14.5 - 15.3 % |
- |
| Copper |
Copper of 2.5 - 4.0 % |
- |
| Manganese |
Manganese of 1.0 |
max. |
| Molybdenum |
Molybdenum of 0.5 |
max. |
| Nickel |
Nickel of 4.5 - 5.5 % |
- |
| Niobium |
Niobium of 0.45 |
max., min: 5xC |
| Phosphorus |
Phosphorus of 0.025 |
max. |
| Silicon |
Silicon of 0.6000000000000001 |
max. |
| Sulfur |
Sulfur of 0.005 |
max. |
UGI® 4545 AIR H900 electrical
| Property |
Value |
| Electrical resistivity |
Electrical resistivity of 7.1e-07 Ω·m |
UGI® 4545 AIR H900 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 170 GPa |
- |
| - |
300 °C |
Elastic modulus of 175 GPa |
- |
| Elongation |
- |
Elongation of 10 % |
min. |
| Hardness, Brinell |
- |
Hardness, Brinell of 388.0 [-] |
min. |
| Hardness, Rockwell C |
- |
Hardness, Rockwell C of 40.0 [-] |
min. |
| Reduction of area |
- |
Reduction of area of 40.0 % |
min. |
| Tensile strength |
- |
Tensile strength of 1310 MPa |
min. |
UGI® 4545 AIR H900 application
| Property |
- |
- |
| Application areas |
| Corrosion properties |
Environment |
Behavior |
| Nitric acid |
Good |
| Phosphoric acid |
Restricted use |
| Sulphuric acid |
Restricted use |
| Acetic acid |
Average |
| Sodium carbonate |
Average |
| NaCl (fog test) |
Good |
| Humidity |
Excellent |
| Sea water |
Restricted use |
| Oil/gas |
Restricted use |
Optimize your operations with our efficient steel solutions, designed to enhance productivity and drive cost-effectiveness.
-- Our promise
Similar or equivalent steel materials
Get a quote