USA AMS SA-688/SA-688M, SA-688 S32654 Specialsteel Specification for Welded Austenitic Stainless Steel Feedwater Heater Tubes and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
| Category | Class | Grade | Type | Standard | Country | Application |
|---|---|---|---|---|---|---|
| Steel Grades | Specialsteel | SA-688 S32654 | Austenite | AMS | USA | Specification for Welded Austenitic Stainless Steel Feedwater Heater Tubes |
| C | Mn | Si | P | S | Cr | Ni | Cu | N |
|---|---|---|---|---|---|---|---|---|
| ≤0.02 | 2.00 -4.00 | ≤0.50 | ≤0.03 | ≤0.005 | 24.00 -25.00 | 7.00 -8.00 | 0.30 -0.60 | 0.45 -0.55 |
| 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) |
|---|---|---|---|---|---|---|
| 916 (≥) | 716 (≥) | 21 | 44 | 12 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 232 |
| 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 |
|---|---|---|---|---|---|---|---|
| 22 | - | - | 0.34 | - | |||
| 384 | 952 | - | 21.3 | 331 | - | ||
| 292 | - | 13 | 44.2 | 332 | 332 |
Heat treated : 1276°C - 1734°C
| SA-688/SA-688M | Specification for Welded Austenitic Stainless Steel Feedwater Heater Tubes | SA-688-SA-688M.pdf |
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