France AFNOR NF A 49-245, NF A 49-647, TSZ8C17 Specialsteel Steel tubes. Structural welded tubes, circular, square, rectangular or oval, in ferritic or austenitic stainless steels. Dimensions. Technical delivery conditions and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
| Category | Class | Grade | Standard | Country | Application | 
|---|---|---|---|---|---|
| Steel Grades | Specialsteel | TSZ8C17 | AFNOR | France | Steel tubes. Structural welded tubes, circular, square, rectangular or oval, in ferritic or austenitic stainless steels. Dimensions. Technical delivery conditions | 
| C | Si | Mn | P | S | Cr | Mo | Ni | 
|---|---|---|---|---|---|---|---|
| ≤0.080 | ≤0.75 | ≤0.75 | ≤0.040 | ≤0.015 | 16.00 -17.50 | ≤ ≥ | ≤ ≥ | 
| Yield Rp0.2 (MPa)  | 
                                            Tensile Rm (MPa)  | 
                                            Impact KV/Ku (J)  | 
                                            Elongation A (%)  | 
                                            Reduction in cross section on fracture Z (%)  | 
                                            As-Heat-Treated Condition | Brinell hardness (HBW) | 
|---|---|---|---|---|---|---|
| 332 (≥) | 127 (≥) | 22 | 32 | 42 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 233 | 
| Temperature (°C)  | 
                                        Modulus of elasticity (GPa)  | 
                                        Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and | Thermal conductivity (W/m·°C)  | 
                                        Specific thermal capacity (J/kg·°C)  | 
                                        Specific electrical resistivity (Ω mm²/m)  | 
                                        Density (kg/dm³)  | 
                                        Poisson’s coefficient, ν | 
|---|---|---|---|---|---|---|---|
| 24 | - | - | 0.21 | - | |||
| 274 | 397 | - | 12.3 | 333 | - | ||
| 546 | - | 14 | 42.2 | 143 | 224 | 
Heat treated : 1389°C - 1581°C
| NF A 49-245 | Steel tubes. Longitudinally pressure welded tubes from non alloy and ferritic alloy steels for heat exchangers in diameters from 15, 9 mm and 76, 1 mm inclusive. Dimensions. Technical delivery conditions | NF-A-49-245.pdf | 
| NF A 49-647 | Steel tubes. Structural welded tubes, circular, square, rectangular or oval, in ferritic or austenitic stainless steels. Dimensions. Technical delivery conditions | NF-A-49-647.pdf | 
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