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Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service
| ITEM | Standard Number | Descriptions |
|---|---|---|
| 1 | SA-268/SA-268M | Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service |
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.01 | |||
| Mn | 0.40 | |||
| Si | 0.40 | |||
| P | 0.02 | |||
| S | 0.02 | |||
| Cr | 25.00 | 27.00 | ||
| Ni | 0.50 | |||
| Mo | 0.75 | 1.50 | ||
| N | 0.015 | |||
| Nb | 0.05 | 0.20 | ||
| Cu | 0.20 |
| Tensile strength | 454～829 | σb/MPa |
| Yield Strength | 851 | σ 0.2 ≥/MPa |
| Elongation | 30 | δ5≥(％) |
| ψ | - | ψ≥(％) |
| Akv | - | Akv≥/J |
| HBS | 347～334 | - |
| HRC | 30 | - |
| Thermal expansion | 44-88 | e-6/K |
| Thermal conductivity | 57-98 | W/m.K |
| Specific heat | 450-460 | J/kg.K |
| Melting temperature | 6466-8023 | 째C |
| Density | 7190-7493 | kg/m3 |
| Resistivity | 0.50-0.60 | Ohm.mm2/m |
| Steel Grade | Specification | Processing range(mm) |
| SA-268 S44627 Stainless Steels | Round Bar and Hollow Bar | Φ1 to Φ2000 |
| Square and Flat Steel | Φ10 to Φ100 | |
| Plate and Sheet | 0.08-800(Thickness)*10-1500(Width)*Length | |
| Tube or Pipe | OD:Φ4-410; WT:1-35 mm; Lenght:10-12000 | |
| Coil and Strip Steel | THK:0.1mm Width:1500mm | |
| Forged | Ring/Cylindrical/Disk |
