The UGI® 4313 +QT780
The UGI® 4313 +QT780 introduction
The UGI® 4313 grade is a low-carbon nickel-alloyed martensitic stainless steel which combines high mechanical properties, good impact strength and a corrosion resistance superior to that of conventional martensitic stainless steel grades with a high C content. It can be used between -60°C and +300°C.
In the heat-treated condition (quenching + tempering), the microstructure of UGI® 4313 consists of tempered martensite. It may possibly contain traces of ferrite and residual austenite. Depending on the tempering temperature chosen, UGI® 4313 may contain up to about 15% of residual austenite.
UGI® 4313 is ferromagnetic (it attracts the magnet), irrespective of its metallurgical condition. However, its magnetic properties (permeability, coercive force, remanence and polarization at saturation) depend on the conditions of heat treatment. It is a good candidate for applications where a compromise between mechanical strength, corrosion resistance and magnetism is required, for example for fuel injectors in the automotive sector. For more information, please consult with the supplier
Equivalent material: EN 1.4313, DIN 1.4313, EN X3CrNiMo13-4, DIN X3CrNiMo13-4, UNS S41500, JIS SUSF6NM, ISO 4313-415-00-I, ISO X3CrNiMo13-4
The UGI® 4313 +QT780 general
| Property |
Value |
| Density |
Density of 7.7 g/cm³ |
The UGI® 4313 +QT780 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 0.0000109 1/K |
20 to 200°C |
| - |
Coefficient of thermal expansion of 0.0000113 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) |
- |
The UGI® 4313 +QT780 chemical
| Property |
Value |
Comment |
| Carbon |
Carbon of 0.05 |
max. |
| Chromium |
Chromium of 12.0 - 14.0 % |
- |
| Manganese |
Manganese of 1.5 |
max. |
| Molybdenum |
Molybdenum of 0.30000000000000004 - 0.7000000000000001 % |
- |
| Nickel |
Nickel of 3.5 - 4.5 % |
- |
| Nitrogen |
Nitrogen of 0.02 % |
max. |
| Phosphorus |
Phosphorus of 0.04 |
max. |
| Silicon |
Silicon of 0.7000000000000001 |
max. |
| Sulfur |
Sulfur of 0.015 |
max. |
The UGI® 4313 +QT780 electrical
| Property |
Value |
| Electrical resistivity |
Electrical resistivity of 6.000000000000001e-07 Ω·m |
The UGI® 4313 +QT780 mechanical
| Property |
Temperature |
Value |
Comment |
| Charpy impact energy, V-notch |
-60 °C |
Charpy impact energy, V-notch of 50 J |
- |
| - |
20 °C |
Charpy impact energy, V-notch of 70 J |
- |
| 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 15 % |
min., diameter ≤ 160mm |
| Tensile strength |
- |
Tensile strength of 780.0 - 980.0 MPa |
diameter ≤ 160mm |
The UGI® 4313 +QT780 application
| Property |
- |
- |
| Application areas |
| Cold Forming |
| Corrosion properties |
| General machinability |
| Heat Treatment |
| Hot forming |
| Other |
Product |
Shape |
Finish |
Tolerance |
Dimensions (mm) |
| Descaled rolled bars |
Round |
- |
12 to 13 |
22 to 115 |
| Bars cold-worked by drawing, turning and grinding |
Round |
- |
6 to 11 |
2 to 115 |
| Wire rod |
Round |
Pickled |
- |
5 to 32 |
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