Properties
General
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Charpy impact energy | -196.0 °C | 60 J Show Supplier Material materials with Charpy impact energy of 60 J | EN 13445-2 (UFPV-2) and EN 10216-5 |
Creep strength 10^4 cycles | 550.0 °C | 234 MPa Show Supplier Material materials with Creep strength 10^4 cycles of 234 MPa | ISO values, at 10000h |
575.0 °C | 175 MPa Show Supplier Material materials with Creep strength 10^4 cycles of 175 MPa | ISO values, at 10000h | |
600.0 °C | 143 MPa Show Supplier Material materials with Creep strength 10^4 cycles of 143 MPa | ISO values, at 10000h | |
625.0 °C | 110 MPa Show Supplier Material materials with Creep strength 10^4 cycles of 110 MPa | ISO values, at 10000h | |
650.0 °C | 90 MPa Show Supplier Material materials with Creep strength 10^4 cycles of 90 MPa | ISO values, at 10000h | |
675.0 °C | 76 MPa Show Supplier Material materials with Creep strength 10^4 cycles of 76 MPa | ISO values, at 10000h | |
700.0 °C | 59 MPa Show Supplier Material materials with Creep strength 10^4 cycles of 59 MPa | ISO values, at 10000h | |
750.0 °C | 29 MPa Show Supplier Material materials with Creep strength 10^4 cycles of 29 MPa | ISO values, at 10000h | |
Creep strength 10^5 cycles | 550.0 °C | 184 MPa Show Supplier Material materials with Creep strength 10^5 cycles of 184 MPa | ISO values, at 100000h |
575.0 °C | 126 MPa Show Supplier Material materials with Creep strength 10^5 cycles of 126 MPa | ISO values, at 100000h | |
600.0 °C | 94 MPa Show Supplier Material materials with Creep strength 10^5 cycles of 94 MPa | ISO values, at 100000h | |
625.0 °C | 75 MPa Show Supplier Material materials with Creep strength 10^5 cycles of 75 MPa | ISO values, at 100000h | |
650.0 °C | 58 MPa Show Supplier Material materials with Creep strength 10^5 cycles of 58 MPa | ISO values, at 100000h | |
675.0 °C | 48 MPa Show Supplier Material materials with Creep strength 10^5 cycles of 48 MPa | ISO values, at 100000h | |
700.0 °C | 39 MPa Show Supplier Material materials with Creep strength 10^5 cycles of 39 MPa | ISO values, at 100000h | |
750.0 °C | 16 MPa Show Supplier Material materials with Creep strength 10^5 cycles of 16 MPa | ISO values, at 100000h | |
Elastic modulus | 20.0 °C | 200 GPa Show Supplier Material materials with Elastic modulus of 200 GPa | |
100.0 °C | 194 GPa Show Supplier Material materials with Elastic modulus of 194 GPa | ||
200.0 °C | 186 GPa Show Supplier Material materials with Elastic modulus of 186 GPa | ||
300.0 °C | 179 GPa Show Supplier Material materials with Elastic modulus of 179 GPa | ||
400.0 °C | 172 GPa Show Supplier Material materials with Elastic modulus of 172 GPa | ||
500.0 °C | 165 GPa Show Supplier Material materials with Elastic modulus of 165 GPa | ||
Elongation | 23.0 °C | 35 % Show Supplier Material materials with Elongation of 35 % | min., NFA 49-117 and NFA 49–217 with min 45% can be fulfilled. |
Hardness, Rockwell B | 23.0 °C | 90 [-] Show Supplier Material materials with Hardness, Rockwell B of 90 [-] | max. |
Tensile strength | 23.0 °C | 515 - 690 MPa Show Supplier Material materials with Tensile strength of 515 - 690 MPa | |
Yield strength Rp0.1 | 20.0 °C | 240 MPa Show Supplier Material materials with Yield strength Rp0.1 of 240 MPa | min. |
50.0 °C | 230 MPa Show Supplier Material materials with Yield strength Rp0.1 of 230 MPa | min. | |
100.0 °C | 210 MPa Show Supplier Material materials with Yield strength Rp0.1 of 210 MPa | min. | |
150.0 °C | 195 MPa Show Supplier Material materials with Yield strength Rp0.1 of 195 MPa | min. | |
200.0 °C | 185 MPa Show Supplier Material materials with Yield strength Rp0.1 of 185 MPa | min. | |
250.0 °C | 180 MPa Show Supplier Material materials with Yield strength Rp0.1 of 180 MPa | min. | |
300.0 °C | 175 MPa Show Supplier Material materials with Yield strength Rp0.1 of 175 MPa | min. | |
350.0 °C | 170 MPa Show Supplier Material materials with Yield strength Rp0.1 of 170 MPa | min. | |
400.0 °C | 165 MPa Show Supplier Material materials with Yield strength Rp0.1 of 165 MPa | min. | |
450.0 °C | 165 MPa Show Supplier Material materials with Yield strength Rp0.1 of 165 MPa | min. | |
500.0 °C | 160 MPa Show Supplier Material materials with Yield strength Rp0.1 of 160 MPa | min. | |
550.0 °C | 160 MPa Show Supplier Material materials with Yield strength Rp0.1 of 160 MPa | min. | |
600.0 °C | 155 MPa Show Supplier Material materials with Yield strength Rp0.1 of 155 MPa | min. | |
Yield strength Rp0.2 | 20.0 °C | 210 MPa Show Supplier Material materials with Yield strength Rp0.2 of 210 MPa | min. |
50.0 °C | 195 MPa Show Supplier Material materials with Yield strength Rp0.2 of 195 MPa | min. | |
100.0 °C | 180 MPa Show Supplier Material materials with Yield strength Rp0.2 of 180 MPa | min. | |
150.0 °C | 170 MPa Show Supplier Material materials with Yield strength Rp0.2 of 170 MPa | min. | |
200.0 °C | 160 MPa Show Supplier Material materials with Yield strength Rp0.2 of 160 MPa | min. | |
250.0 °C | 150 MPa Show Supplier Material materials with Yield strength Rp0.2 of 150 MPa | min. | |
300.0 °C | 140 MPa Show Supplier Material materials with Yield strength Rp0.2 of 140 MPa | min. | |
350.0 °C | 135 MPa Show Supplier Material materials with Yield strength Rp0.2 of 135 MPa | min. | |
400.0 °C | 130 MPa Show Supplier Material materials with Yield strength Rp0.2 of 130 MPa | min. | |
450.0 °C | 130 MPa Show Supplier Material materials with Yield strength Rp0.2 of 130 MPa | min. | |
500.0 °C | 125 MPa Show Supplier Material materials with Yield strength Rp0.2 of 125 MPa | min. | |
550.0 °C | 125 MPa Show Supplier Material materials with Yield strength Rp0.2 of 125 MPa | min. | |
600.0 °C | 120 MPa Show Supplier Material materials with Yield strength Rp0.2 of 120 MPa | min. | |
Thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
Coefficient of thermal expansion | 100.0 °C | 1.75E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.75E-5 1/K | for 30°C to the mentioned temperature |
200.0 °C | 1.75E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.75E-5 1/K | for 30°C to the mentioned temperature | |
300.0 °C | 1.8E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.8E-5 1/K | for 30°C to the mentioned temperature | |
400.0 °C | 1.8E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.8E-5 1/K | for 30°C to the mentioned temperature | |
500.0 °C | 1.85E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.85E-5 1/K | for 30°C to the mentioned temperature | |
600.0 °C | 1.85E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.85E-5 1/K | for 30°C to the mentioned temperature | |
700.0 °C | 1.9E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.9E-5 1/K | for 30°C to the mentioned temperature | |
Specific heat capacity | 20.0 °C | 465 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 465 J/(kg·K) | |
100.0 °C | 490 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 490 J/(kg·K) | ||
200.0 °C | 515 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 515 J/(kg·K) | ||
300.0 °C | 540 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 540 J/(kg·K) | ||
400.0 °C | 560 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 560 J/(kg·K) | ||
500.0 °C | 580 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 580 J/(kg·K) | ||
600.0 °C | 595 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 595 J/(kg·K) | ||
700.0 °C | 610 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 610 J/(kg·K) | ||
800.0 °C | 625 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 625 J/(kg·K) | ||
900.0 °C | 640 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 640 J/(kg·K) | ||
1000.0 °C | 650 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 650 J/(kg·K) | ||
Thermal conductivity | 20.0 °C | 14 W/(m·K) Show Supplier Material materials with Thermal conductivity of 14 W/(m·K) | |
100.0 °C | 15 W/(m·K) Show Supplier Material materials with Thermal conductivity of 15 W/(m·K) | ||
200.0 °C | 17 W/(m·K) Show Supplier Material materials with Thermal conductivity of 17 W/(m·K) | ||
300.0 °C | 19 W/(m·K) Show Supplier Material materials with Thermal conductivity of 19 W/(m·K) | ||
400.0 °C | 21 W/(m·K) Show Supplier Material materials with Thermal conductivity of 21 W/(m·K) | ||
500.0 °C | 22 W/(m·K) Show Supplier Material materials with Thermal conductivity of 22 W/(m·K) | ||
600.0 °C | 24 W/(m·K) Show Supplier Material materials with Thermal conductivity of 24 W/(m·K) | ||
700.0 °C | 25 W/(m·K) Show Supplier Material materials with Thermal conductivity of 25 W/(m·K) | ||
800.0 °C | 26 W/(m·K) Show Supplier Material materials with Thermal conductivity of 26 W/(m·K) | ||
900.0 °C | 28 W/(m·K) Show Supplier Material materials with Thermal conductivity of 28 W/(m·K) | ||
1000.0 °C | 29 W/(m·K) Show Supplier Material materials with Thermal conductivity of 29 W/(m·K) | ||
1100.0 °C | 30 W/(m·K) Show Supplier Material materials with Thermal conductivity of 30 W/(m·K) | ||
Chemical properties
| Property | Value | Comment | |
|---|---|---|---|
Carbon | 0.05 % Show Supplier Material materials with Carbon of 0.05 % | max. | |
Chromium | 17.5 % Show Supplier Material materials with Chromium of 17.5 % | ||
Iron | Balance | ||
Manganese | 1.3 % Show Supplier Material materials with Manganese of 1.3 % | ||
Nickel | 10.5 % Show Supplier Material materials with Nickel of 10.5 % | ||
Phosphorus | 0.03 % Show Supplier Material materials with Phosphorus of 0.03 % | max. | |
Silicon | 0.5 % Show Supplier Material materials with Silicon of 0.5 % | ||
Sulfur | 0.015 % Show Supplier Material materials with Sulfur of 0.015 % | max. | |
Titanium | 0.25 % Show Supplier Material materials with Titanium of 0.25 % | ||
Technological properties
| Property | ||
|---|---|---|
| Application areas | Good resistance to hydrogen sulfide gas and intergranular corrosion coupled with good high temperature strength make Sandvik 6R35 a suitable material for applications as tubes in heating furnaces and heat exchangers in sulfurization and hydro-treating plants. In the petrochemical industry the steel is used in cracking furnaces for the production of ethylene and vinyl chloride. It is also frequently used for heat exchangers and piping in the chemical and petrochemical industries. | |
| Certifications | Approvals: PED (Pressure Equipment Directive) 2014/68/EU and AD2000 | |
| Cold Forming | Annealing after cold bending is not normally necessary, but this point must be decided with regard to the degree of bending and the operating conditions. Heat treatment, if any, should take the form of stress-relieving or solution annealing. | |
| Corrosion properties | General corrosion: Sandvik 6R35 has with some limitations (nitric acid) the same resistance as the unstabilized steel ASTM 304. Consequently, the grades have good resistance to: Intergranular corrosion: The stabilization with titanium gives Sandvik 6R35 improved resistance to intergranular corrosion. Pitting and crevice corrosion: Pitting and crevice corrosion may occur even in solutions of relatively low chloride content. However, the stabilization with titanium results in a somewhat better resistance than that of ASTM 304. Stress corrosion cracking: Austenitic steels, like Sandvik 6R35 are susceptible to stress corrosion cracking. This may occur at temperatures above about 60°C (140°F), if the material is subjected to tensile stresses and at the same time comes into contact with certain solutions, particularly those containing chlorides. Such service conditions should therefore be avoided. Conditions when plants are shut down must also be considered as the condensates which are then formed can develop a chloride content that leads to both stress corrosion cracking and pitting. In applications demanding high resistance to stress corrosion cracking we recommend the austenitic-ferritic steel Sandvik SAF 2304. Gas corrosion, Sandvik 6R35 can be used in: Creep should also be taken into account when using the steel in the creep range. In flue gases containing sulfur, the corrosion resistance is reduced. in such environments this steel can be used at temperatures up to 600-750°C (1110-1380°F) depending on service conditions. Factors to consider are whether the atmosphere is oxidizing or reducing, i.e. the oxygen content, and whether impurities such as sodium and vanadium are present. | |
| Heat Treatment | The tubes are normally delivered as described above. If additional heat treatment is needed after further processing the following is recommended. Solution annealing: Stress relieving: 850-950°C (1560-1740°F), 10-15 minutes, cooling in air. | |
| Hot forming | Hot bending is carried out at 1100-850°C (2010-1560°F) and should be followed by solution annealing. | |
| Machining | Sandvik 6R35 has good machining properties. Please contact Sandvik for detailed recommendations on the choice of tools and cutting data. | |
| Other | Forms of supply: Seamless tube and pipe in Sandvik 6R35 is supplied in dimensions up to 260 mm outside diameter in the solution-annealed and white-pickled condition or solution-annealed in a bright-annealing process. Hollow bars are supplied solution-annealed and white-pickled. Sizes in stock: | |
| Welding | The weldability of Sandvik 6R35 is good. Welding must be carried out without preheating and subsequent heat treatment is normally not required. Suitable methods of fusion welding are manual metal-arc welding (MMA/SMAW) and gas-shielded arc welding, with the TIG/GTAW method as first choice. For Sandvik 6R35, heat input of <1.5 kJ/mm and interpass temperature of <150°C (300°F) are recommended. Recommended filler metals:
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