Seamless nickel-chromium-iron alloy heat exchanger tubes
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | - | 0.05 | ||
| Si | - | 1.00 | ||
| Mn | - | 1.00 | ||
| P | - | 0.03 | ||
| S | - | 0.015 | ||
| Cr | 19.50 | 23.00 | ||
| Ni | 38.00 | 46.00 | ||
| Cu | 1.50 | 3.00 | ||
| Al | - | 0.20 | ||
| Ti | 0.60 | 1.20 | ||
| Fe | remaining | - | ||
| Mo | 2.50 | 3.50 |
Seamless nickel-chromium-iron alloy heat exchanger tubes
| Proof strength Rp0.2 (MPa) |
Tensile strength Rm (MPa) |
Impact energy KV (J) |
Elongation at fracture A (%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
| 375 (≥) | 158 (≥) | 34 | 34 | 22 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 431 |
| Property | Density kg/dm3 |
Temperature T °C/F |
Specific heat J / kgK |
Thermal conductivity W/mK |
Electric resistance µΩ·cm |
Modulus of elasticity kN/mm2 |
Expansion rate |
|---|---|---|---|---|---|---|---|
| 425 (≥) | 441 (≥) | 32 | 41 | 44 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 112 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 676 | 729 | 876 |
We can customize the production of NCF 825 TB grade, contact us for the best solution.
–sales@specificsteel.com