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Seamless circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 2: Stainless steel, Austenitic steel designed to deal with sour gas, phosphoric, sulphuric and acetic acids, and vinyl chloride. It is used for heat exchangers, coolers, tanks, pumps and pipelines in the chemical, cryogenic, paper, petrochemical and energy industries, for elements of mining platforms, and for aircraft structures, screws and valves.It has a better corrosion resistance than UNS N08904 / 904L / 1.4539.The steel is resistant to intergranular corrosion in the delivery condition. It also has an excellent resistance to stress corrosion cracking phenomena, particularly in case of hot chloride environments.The alloy belongs to the welding group ISO 8.2; Preheating is not necessary.
| ITEM | Standard Number | Descriptions |
|---|---|---|
| 1 | EN 10028-7 | Flat products made of steels for pressure purposes - Part 7: Stainless steels |
| 2 | EN 10088-1 | Stainless steels - Part 1: List of stainless steels |
| 3 | EN 10088-2 | Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes |
| 4 | EN 10088-3 | Stainless steels - Part 3: Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products of corrosion resisting steels for general purposes |
| 5 | EN 10088-4 | Stainless steels - Part 4: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for construction purposes |
| 6 | EN 10088-5 | Stainless steels - Part 5: Technical delivery conditions for bars, rods, wire, sections and bright products of corrosion resisting steels for construction purposes |
| 7 | EN 10216-5 (2004) | Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 5: Stainless steel tubes |
| 8 | EN 10217-7 | Welded steel tubes for pressure purposes - Technical delivery conditions - Part 7: Stainless steel tubes |
| 9 | EN 10250-4 | Open die steel forgings for general engineering purposes - Part 4: Stainless steels |
| 10 | EN 10253-3 | Butt-welding pipe fittings - Part 3: Wrought austenitic and austenitic-ferritic (duplex) stainless steels without specific inspection requirements |
| 11 | EN 10253-4 | Butt-welding pipe fittings - Part 4: Wrought austenitic and austenitic-ferritic (duplex) stainless steels with specific inspection requirements |
| 12 | EN 10272 | Stainless steel bars for pressure purposes |
| 13 | EN 10297-2 (2005) | Seamless circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 2: Stainless steel |
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.020 | |||
| Si | 0.70 | |||
| Mn | 2.00 | |||
| P | 0.030 | |||
| S | 0.010 | |||
| Cr | 26.00 | 28.00 | ||
| Mo | 3.00 | 4.00 | ||
| Ni | 30.00 | 32.00 | ||
| N | 0.11 | |||
| Cu | 0.70 | 1.50 |
| Tensile strength | 184～290 | σb/MPa |
| Yield Strength | 348 | σ 0.2 ≥/MPa |
| Elongation | 75 | δ5≥(％) |
| ψ | - | ψ≥(％) |
| Akv | - | Akv≥/J |
| HBS | 547～739 | - |
| HRC | 30 | - |
| Thermal expansion | 47-42 | e-6/K |
| Thermal conductivity | 34-78 | W/m.K |
| Specific heat | 450-460 | J/kg.K |
| Melting temperature | 5528-4859 | 째C |
| Density | 3131-2990 | kg/m3 |
| Resistivity | 0.50-0.60 | Ohm.mm2/m |
| Steel Grade | Specification | Processing range(mm) |
| X1NiCrMoCu31-27-4, 1.4563, Alloy 28, UNS N08028 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 |
