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| ITEM | Standard Number | Descriptions |
|---|---|---|
| 1 | A 691 (2009) | Carbon and Alloy Steel Pipe, Electric-Fusion-Welded for High-Pressure Service at High Temperatures |
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.05 | |||
| Si | 0.20 | |||
| Mn | 0.50 | |||
| P | ||||
| S | ||||
| Ni | remaining | |||
| Cr | 15.00 | 17.00 | ||
| Al | 4.00 | 5.00 | ||
| Cu | ||||
| Ti | 0.50 | |||
| Fe | 2.00 | 4.00 | ||
| N | ||||
| Mo | 0.50 | |||
| B | 0.006 | |||
| Zr | 0.05 |
| Tensile strength | 100～853 | σb/MPa |
| Yield Strength | 024 | σ 0.2 ≥/MPa |
| Elongation | 29 | δ5≥(％) |
| ψ | - | ψ≥(％) |
| Akv | - | Akv≥/J |
| HBS | 346～588 | - |
| HRC | 30 | - |
| Thermal expansion | 53-30 | e-6/K |
| Thermal conductivity | 42-92 | W/m.K |
| Specific heat | 450-460 | J/kg.K |
| Melting temperature | 0959-3494 | 째C |
| Density | 0640-0464 | kg/m3 |
| Resistivity | 0.50-0.60 | Ohm.mm2/m |
| Steel Grade | Specification | Processing range(mm) |
| A 691 Grade 2 1/4 CR 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 |