Corrodur 4104 QT650 – Premium Stainless Steel for High Machinability
The machinability of 1.4104 (X14CrMoS17) is far superior to that of the ferritic 17% chromium steel, 1.4016 as a result of the controlled sulphur addition to this grade of steel. The addition of sulphur however reduces the resistance to corrosion, and as such 1.4016 is significantly more resistant to corrosion than 1.4104, despite their similar chromium contents. It should be noted that as a result of the sulphur addition, neither minimum impact properties, nor elevated temperature properties are specified.
Properties
General
| Property | Value |
|---|---|
Density | 7.7 g/cm³ |
Dimension
| Property | Value | Comment |
|---|---|---|
Diameter | 160 mm | max. |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Elastic modulus | 20 °C | 215 GPa | |
100 °C | 212 GPa | ||
200 °C | 205 GPa | ||
300 °C | 200 GPa | ||
400 °C | 190 GPa | ||
Elongation | 10 % | A5 | |
Tensile strength | 650 - 850 MPa | ||
Yield strength | 500 MPa | RP02 |
Thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
Coefficient of thermal expansion | 100 °C | 1e-05 1/K | for 20°C to the mentioned temperature |
200 °C | 1.05e-05 1/K | for 20°C to the mentioned temperature | |
300 °C | 1.05e-05 1/K | for 20°C to the mentioned temperature | |
400 °C | 1.05e-05 1/K | for 20°C to the mentioned temperature | |
Specific heat capacity | 460 J/(kg·K) | ||
Thermal conductivity | 25 W/(m·K) |
Electrical
| Property | Value |
|---|---|
Electrical resistivity | 7e-07 Ω·m |
Chemical properties
| Property | Value |
|---|---|
Carbon | 0.1 - 0.17 % |
Chromium | 15.5 - 17.5 % |
Iron | Balance |
Manganese | 1 % |
Molybdenum | 0.2 - 0.6 % |
Phosphorus | 0.04 % |
Silicon | 1 % |
Sulfur | 0.15 - 0.35 % |
Technological properties
| Property | ||
|---|---|---|
| Application areas | Automotive industry, Decorative applications, Kitchen utensils, Electronic equipment | |
| Corrosion properties | Low - Although 1.4104, contains 17 % chromium, the corrosion resistance of this steel is severely compromised by the addition of sulphur. This is particularly true when exposed to environments that promote pitting and crevice corrosion. PRE = 16.16 – 19.48 | |
| General machinability | Very Good -The machinability of this grade of stainless steel is superior to other 12 and 17 % chromium steels as a result of the sulphur addition. | |
| Heat Treatment | Soft annealing: 750-850°C (Cooling in furnace, air) - Hardening: 950-1050°C in polymer, oil, air - Tempering: 550-650°C air | |
| Hot forming | It is formable at 800-1100°C | |
| Processing history | Quenched and tempered QT 650 | |
| Welding | Poor - In general, 1.4104 is not welded, other than occasionally being friction or resistance welded. | |
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