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| ITEM | Standard Number | Descriptions |
|---|---|---|
| 1 | A 268/A 268M (2010) | Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service |
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.01 | |||
| Si | 0.20 | |||
| Mn | 0.30 | |||
| P | ||||
| S | ||||
| Ni | 0.15 | |||
| Cr | 28.00 | 30.00 | ||
| Al | ||||
| Cu | 0.15 | |||
| Ti | ||||
| Fe | ||||
| N | 0.02 | |||
| Mo | 3.50 | 4.20 |
| Tensile strength | 199～377 | σb/MPa |
| Yield Strength | 576 | σ 0.2 ≥/MPa |
| Elongation | 29 | δ5≥(％) |
| ψ | - | ψ≥(％) |
| Akv | - | Akv≥/J |
| HBS | 729～982 | - |
| HRC | 30 | - |
| Thermal expansion | 67-88 | e-6/K |
| Thermal conductivity | 04-77 | W/m.K |
| Specific heat | 450-460 | J/kg.K |
| Melting temperature | 9580-1827 | 째C |
| Density | 2457-8573 | kg/m3 |
| Resistivity | 0.50-0.60 | Ohm.mm2/m |
| Steel Grade | Specification | Processing range(mm) |
| A 268 29-4 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 |