Properties
General
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Charpy impact energy | -270.0 °C | 60 J Show Supplier Material materials with Charpy impact energy of 60 J | EN 13445-2 (UFPV-2) and EN 10216-5 |
-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 | 195 MPa Show Supplier Material materials with Creep strength 10^4 cycles of 195 MPa | ISO values, at 10000h |
575.0 °C | 147 MPa Show Supplier Material materials with Creep strength 10^4 cycles of 147 MPa | ISO values, at 10000h | |
600.0 °C | 122 MPa Show Supplier Material materials with Creep strength 10^4 cycles of 122 MPa | ISO values, at 10000h | |
625.0 °C | 100 MPa Show Supplier Material materials with Creep strength 10^4 cycles of 100 MPa | ISO values, at 10000h | |
650.0 °C | 79 MPa Show Supplier Material materials with Creep strength 10^4 cycles of 79 MPa | ISO values, at 10000h | |
675.0 °C | 64 MPa Show Supplier Material materials with Creep strength 10^4 cycles of 64 MPa | ISO values, at 10000h | |
700.0 °C | 48 MPa Show Supplier Material materials with Creep strength 10^4 cycles of 48 MPa | ISO values, at 10000h | |
Creep strength 10^5 cycles | 550.0 °C | 115 MPa Show Supplier Material materials with Creep strength 10^5 cycles of 115 MPa | ISO values, at 100000h |
575.0 °C | 93 MPa Show Supplier Material materials with Creep strength 10^5 cycles of 93 MPa | ISO values, at 100000h | |
600.0 °C | 74 MPa Show Supplier Material materials with Creep strength 10^5 cycles of 74 MPa | ISO values, at 100000h | |
625.0 °C | 58 MPa Show Supplier Material materials with Creep strength 10^5 cycles of 58 MPa | ISO values, at 100000h | |
650.0 °C | 45 MPa Show Supplier Material materials with Creep strength 10^5 cycles of 45 MPa | ISO values, at 100000h | |
675.0 °C | 33 MPa Show Supplier Material materials with Creep strength 10^5 cycles of 33 MPa | ISO values, at 100000h | |
700.0 °C | 23 MPa Show Supplier Material materials with Creep strength 10^5 cycles of 23 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 | 45 % Show Supplier Material materials with Elongation of 45 % | min. |
Elongation A2 | 23.0 °C | 35 % Show Supplier Material materials with Elongation A2 of 35 % | min. |
Hardness, Rockwell B | 23.0 °C | 90 [-] Show Supplier Material materials with Hardness, Rockwell B of 90 [-] | max. |
Tensile strength | 23.0 °C | 515 - 680 MPa Show Supplier Material materials with Tensile strength of 515 - 680 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 | 215 MPa Show Supplier Material materials with Yield strength Rp0.1 of 215 MPa | min. | |
100.0 °C | 190 MPa Show Supplier Material materials with Yield strength Rp0.1 of 190 MPa | min. | |
150.0 °C | 175 MPa Show Supplier Material materials with Yield strength Rp0.1 of 175 MPa | min. | |
200.0 °C | 165 MPa Show Supplier Material materials with Yield strength Rp0.1 of 165 MPa | min. | |
250.0 °C | 155 MPa Show Supplier Material materials with Yield strength Rp0.1 of 155 MPa | min. | |
300.0 °C | 150 MPa Show Supplier Material materials with Yield strength Rp0.1 of 150 MPa | min. | |
350.0 °C | 145 MPa Show Supplier Material materials with Yield strength Rp0.1 of 145 MPa | min. | |
400.0 °C | 140 MPa Show Supplier Material materials with Yield strength Rp0.1 of 140 MPa | min. | |
450.0 °C | 135 MPa Show Supplier Material materials with Yield strength Rp0.1 of 135 MPa | min. | |
500.0 °C | 130 MPa Show Supplier Material materials with Yield strength Rp0.1 of 130 MPa | min. | |
550.0 °C | 125 MPa Show Supplier Material materials with Yield strength Rp0.1 of 125 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 | 190 MPa Show Supplier Material materials with Yield strength Rp0.2 of 190 MPa | min. | |
100.0 °C | 165 MPa Show Supplier Material materials with Yield strength Rp0.2 of 165 MPa | min. | |
150.0 °C | 150 MPa Show Supplier Material materials with Yield strength Rp0.2 of 150 MPa | min. | |
200.0 °C | 140 MPa Show Supplier Material materials with Yield strength Rp0.2 of 140 MPa | min. | |
250.0 °C | 130 MPa Show Supplier Material materials with Yield strength Rp0.2 of 130 MPa | min. | |
300.0 °C | 125 MPa Show Supplier Material materials with Yield strength Rp0.2 of 125 MPa | min. | |
350.0 °C | 120 MPa Show Supplier Material materials with Yield strength Rp0.2 of 120 MPa | min. | |
400.0 °C | 115 MPa Show Supplier Material materials with Yield strength Rp0.2 of 115 MPa | min. | |
450.0 °C | 110 MPa Show Supplier Material materials with Yield strength Rp0.2 of 110 MPa | min. | |
500.0 °C | 105 MPa Show Supplier Material materials with Yield strength Rp0.2 of 105 MPa | min. | |
550.0 °C | 100 MPa Show Supplier Material materials with Yield strength Rp0.2 of 100 MPa | min. | |
Thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
Coefficient of thermal expansion | 100.0 °C | 1.65E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.65E-5 1/K | for 30°C to the mentioned temperature |
200.0 °C | 1.7E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.7E-5 1/K | for 30°C to the mentioned temperature | |
300.0 °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 | |
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 | 475 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 475 J/(kg·K) | |
100.0 °C | 500 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 500 J/(kg·K) | ||
200.0 °C | 530 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 530 J/(kg·K) | ||
300.0 °C | 560 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 560 J/(kg·K) | ||
400.0 °C | 580 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 580 J/(kg·K) | ||
500.0 °C | 600 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 600 J/(kg·K) | ||
600.0 °C | 615 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 615 J/(kg·K) | ||
700.0 °C | 625 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 625 J/(kg·K) | ||
Thermal conductivity | 20.0 °C | 15 W/(m·K) Show Supplier Material materials with Thermal conductivity of 15 W/(m·K) | |
100.0 °C | 16 W/(m·K) Show Supplier Material materials with Thermal conductivity of 16 W/(m·K) | ||
200.0 °C | 18 W/(m·K) Show Supplier Material materials with Thermal conductivity of 18 W/(m·K) | ||
300.0 °C | 20 W/(m·K) Show Supplier Material materials with Thermal conductivity of 20 W/(m·K) | ||
400.0 °C | 22 W/(m·K) Show Supplier Material materials with Thermal conductivity of 22 W/(m·K) | ||
500.0 °C | 23 W/(m·K) Show Supplier Material materials with Thermal conductivity of 23 W/(m·K) | ||
600.0 °C | 25 W/(m·K) Show Supplier Material materials with Thermal conductivity of 25 W/(m·K) | ||
700.0 °C | 26 W/(m·K) Show Supplier Material materials with Thermal conductivity of 26 W/(m·K) | ||
Chemical properties
| Property | Value | Comment | |
|---|---|---|---|
Carbon | 0.03 % Show Supplier Material materials with Carbon of 0.03 % | max. | |
Chromium | 18.5 % Show Supplier Material materials with Chromium of 18.5 % | ||
Cobalt | Material with extra low Co content can be supplied. | ||
Iron | Balance | ||
Manganese | 1.3 % Show Supplier Material materials with Manganese of 1.3 % | ||
Nickel | 10 % Show Supplier Material materials with Nickel of 10 % | ||
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. | |
Technological properties
| Property | ||
|---|---|---|
| Application areas | Sandvik 3R12 is used for a wide range of industrial applications. Typical examples are: heat exchangers, condensers, pipelines, cooling and heating coils in the chemical, petrochemical, fertilizer, pulp and paper and nuclear power industries, as well as in the production of pharmaceuticals, foods and beverages. | |
| Certifications | Approvals: JIS Approval for Stainless Steel Tubes | |
| 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, see under 'Heat treatment'. | |
| Corrosion properties | General corrosion: Sandvik 3R12 has good resistance in Sandvik 3R12 has better resistance than normal type ASTM TP304 to oxidizing agents, such as nitric acid. The Figure on the right side of the datasheet shows isocorrosion in nitric acid for Sandvik 3R12. Intergranular corrosion: Sandvik 3R12 has a low carbon content and therefore better resistance to intergranular corrosion than steels of type ASTM TP304. The TTC-diagram, attached on the right side of the datasheet, which shows the result of testing for 24 h in boiling Strauss solution (12% sulfuric acid, 6% copper sulfate) confirms the superior resistance of Sandvik 3R12. This is an advantage in complicated welding operations. The good resistance against intergranular attack of Sandvik 3R12 is also demonstrated in the Huey test (boiling in 65% nitric acid for 5x48 h). A maximum corrosion rate of 0.40 mm/year in the annealed condition and 0.60 mm/year in the sensitized (675°C (1275ᵒF)) condition can be met. Sandvik 3R12 with its controlled and low impurity level, shows better results than ordinary ASTM TP304L or TP321. Pitting and crevice corrosion: The steel may be sensitive to pitting and crevice corrosion even in solutions of relatively low chloride content. Molybdenum-alloyed steels have better resistance improves with increasing molybdenum content. Stress corrosion cracking: Austenitic steels are susceptible to stress corrosion cracking (SCC). This may occur at temperatures above about 60°C (140°F) if the steel 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 conditions that leads to both stress corrosion cracking (SCC) and pitting. In applications demanding high resistance to stress corrosion cracking (SCC) we recommend the duplex (austenitic-ferritic) steel Sandvik SAF 2304. Gas corrosion: Sandvik 3R12 can be used in Creep behavior should also be taken into account when using the Sandvik 3R12 in the creep range. In flue gases containing sulfur, the corrosion resistance is reduced. In such environments the 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 | Tubes in Sandvik 3R12 are normally delivered in heat treated condition. If additional heat treatment is needed after further processing the following is recommended. Stress relieving: 850-950°C (1560-1740°F), cooling in air. Solution annealing: 1000-1100°C (1830-2010°F), rapid cooling in air or water. | |
| Hot forming | Hot bending is carried out at 1100-850°C (2010-1560°F) and should be followed by solution annealing. | |
| Other | Forms of supply: Seamless tube and pipe in Sandvik 3R12 is supplied in dimensions up to 260 mm (10.2 in.) outside diameter in the solution-annealed and white-pickled condition or solution annealed by a bright-annealing process. U-bent tubes can be supplied on request. | |
| Welding | The weldability of Sandvik 3R12 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 3R12, heat input of <2.0 kJ/mm and interpass temperature of <150°C (300°F) are recommended. Recommended filler metals
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