Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service
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| Category | Type | Grade | Microstructure | Designations |
|---|---|---|---|---|
| Grades | Stainless Steels | SA-268 S44660 | Ferrite | USA - AMS , SA-268/SA-268M | |
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | - | 0.03 | ||
| Mn | - | 1.00 | ||
| Si | - | 1.00 | ||
| P | - | 0.04 | ||
| S | - | 0.03 | ||
| Cr | 25.00 | 28.00 | ||
| Ni | 1.00 | 3.50 | ||
| Mo | 3.00 | 4.00 | ||
| N | - | 0.04 |
| 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) |
|---|---|---|---|---|---|---|
| 449 (≥) | 113 (≥) | 31 | 24 | 44 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 242 |
| 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 |
|---|---|---|---|---|---|---|---|
| 592 (≥) | 944 (≥) | 14 | 24 | 43 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 142 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 882 | 269 | 727 |
| Product type | Products | Dimension | Processes | Deliver Status |
|---|---|---|---|---|
| Plates / Sheets | Plates / Sheets | 0.08-200mm(T)*W*L | Forging, hot rolling and cold rolling | Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting |
| Steel Bar | Round Bar, Flat Bar, Square Bar | Φ8-1200mm*L | Forging, hot rolling and cold rolling, Cast | Black, Rough Turning, Shot Blasting, |
| Coil / Strip | Steel Coil /Steel Strip | 0.03-16.0x1200mm | Cold-Rolled & Hot-Rolled | Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting |
| Pipes / Tubes | Seamless Pipes/Tubes, Welded Pipes/Tubes | OD:6-219mm x WT:0.5-20.0mm | Hot extrusion, Cold Drawn, Welded | Annealed, Solution and Aging, Q+T, ACID-WASHED |
| Grade | Standard | Country | Application |
|---|---|---|---|
| A 176 S44660 | SAE | USA | Stainless and Heat-Resisting Chromium Steel Plate, Sheet, and Strip |
| A 240 S44660 | SAE | USA | Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications |
| A 268 S44660 | SAE | USA | Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service |
| S44660 | AISI | USA | Ferritic Chromium Molybdenum Nickel Stainless Steel (SC-1) |
| SA-240 S44660 | AMS | USA | Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications |
| SA-268 S44660 | AMS | USA | Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service |
| A 176 S44660 | SAE | USA | Stainless and Heat-Resisting Chromium Steel Plate, Sheet, and Strip |
| A 240 S44660 | SAE | USA | Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications |
| A 268 S44660 | SAE | USA | Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service |
| S44660 | AISI | USA | Ferritic Chromium Molybdenum Nickel Stainless Steel (SC-1) |
| SA-240 S44660 | AMS | USA | Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications |
| SA-268 S44660 | AMS | USA | Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service |