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Обзор
SS329 round bar is a ferritic-austenitic duplex stainless steel bar product. As a first-generation duplex stainless steel, SS329 bar is widely used in marine, chemical, and pulp & paper industries for its combination of high strength and good corrosion resistance. Its microstructure consists of approximately 55–75% ferrite + austenite (balance).
Описание (Английский)
SS329 round bar is a ferritic-austenitic duplex stainless steel bar product. As a first-generation duplex stainless steel, SS329 bar is widely used in marine, chemical, and pulp & paper industries for its combination of high strength and good corrosion resistance. Its microstructure consists of approximately 55–75% ferrite + austenite (balance).
Диапазон Размеров
- Up to Φ600 mm
- h9, h11, h12 (standard); h6/h7/h8 (precision ground)
Спецификация Марки
| Система | Значение |
|---|---|
| 🇺🇸 UNS | S32900 |
| AISI / ASTM | 329 |
| 🇪🇺 EN | 1.4460 (X6CrNiMo23.5) |
| 🇩🇪 DIN | 1.4460 |
| 🇯🇵 JIS | SUS329J1 |
| 🇨🇳 GB | 0Cr26Ni5Mo2 (S22553) — approximate |
Химический Состав
| Элемент | Значение |
|---|---|
| C | ≤ 0.08 |
| Si | ≤ 0.75 |
| Mn | ≤ 1.00 |
| P | ≤ 0.040 |
| S | ≤ 0.030 |
| Cr | 23.0 – 28.0 |
| Ni | 2.5 – 5.0 |
| Mo | 1.0 – 2.0 |
| N | ≤ 0.08 |
| Fe | Balance |
Механические Свойства
| productCenter.property | Значение |
|---|---|
| Tensile Strength Rm | ≥ 620 MPa |
| Yield Strength Rp0.2 | ≥ 450 MPa |
| Elongation A | ≥ 20% |
| Hardness | ≤ 260 HB |
Физические Свойства
| Свойство | Единица | Значение |
|---|---|---|
| Density | g/cm³ | 7.80 g/cm³ |
| Melting Point Range | °C | 1,400 – 1,450 °C |
| Modulus of Elasticity E | GPa | 1,400 – 1,450 °C |
| Shear Modulus G | - | 77 GPa |
| Poisson's Ratio | - | 0.27 – 0.30 |
| Thermal Conductivity (20°C) | W/m·K | 14 – 17 W/(m·K) |
| CTE (20–100°C) | - | 12 – 13 ppm/°C |
| Electrical Resistivity | μΩ·cm | ~87 μΩ·cm |
| Magnetism | - | Magnetic (high ferrite content) |
| Specific Heat | J/kg·K | ~0.46 kJ/(kg·K) |
Применение
- Marine / Offshore
- Chemical / Petrochemical
- Pulp & Paper
- Water treatment
- Oil & Gas
- General Engineering
- Power Generation
- Food Processing