France AFNOR NF A 35-578, NF A 49-214, Z6CNNb18-12B Specialsteel Steel tubes. Seamless austenitic steel tubes for use at high temperatures. Dimensions (with normal tolerances). Technical conditions of delivery and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
| Category | Class | Grade | Standard | Country | Application |
|---|---|---|---|---|---|
| Steel Grades | Specialsteel | Z6CNNb18-12B | AFNOR | France | Steel tubes. Seamless austenitic steel tubes for use at high temperatures. Dimensions (with normal tolerances). Technical conditions of delivery |
| C | Si | Mn | P | S | Cr | Mo | Ni | B | Nb |
|---|---|---|---|---|---|---|---|---|---|
| 0.04 -0.08 | ≤0.75 | ≤2.00 | ≤0.040 | ≤0.015 | 17.00 -19.00 | 11.00 -13.00 | ≤ ≥ | 0.0015 -0.0060 | 10×C - ≥ |
| 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) |
|---|---|---|---|---|---|---|
| 257 (≥) | 795 (≥) | 24 | 12 | 44 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 332 |
| 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 |
|---|---|---|---|---|---|---|---|
| 31 | - | - | 0.12 | - | |||
| 552 | 833 | - | 41.3 | 121 | - | ||
| 163 | - | 12 | 12.2 | 132 | 222 |
Heat treated : 1718°C - 1121°C
| Grade | Standard | Country | Application |
|---|---|---|---|
| Z6CNNb18-12B | |||
| Z6CNNb18-12B |
| NF A 35-578 | Iron and steel. Stainless steel for high temperature application | NF-A-35-578.pdf |
| NF A 49-214 | Steel tubes. Seamless austenitic steel tubes for use at high temperatures. Dimensions (with normal tolerances). Technical conditions of delivery | NF-A-49-214.pdf |
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