Нержавеющая СтальДругие
Обзор
317L (UNS S31703) slip-on flange is a low-carbon, molybdenum-bearing austenitic stainless steel flange designed to slip over a pipe and be fillet-welded both at the hub (top) and inside the bore. 317L provides superior corrosion resistance over 316L, especially in chloride-containing, sulfuric acid, and high-temperature process environments, due to its higher chromium (18–20%), nickel (11–15%), and molybdenum (3.0–4.0%) contents. The low carbon variant (L, ≤0.030% C) eliminates carbide precipitation during welding, preserving corrosion resistance in the heat-affected zone (HAZ). Slip-on flanges are the most commonly used pipe flange type in industrial piping due to ease of alignment, lower cost, and simple installation.
Диапазон Размеров
- 1/2"-24"(DN15-DN584)
Спецификация Марки
| Система | Значение |
|---|---|
| Material | 317L Low-Carbon Austenitic Stainless Steel |
| 🇺🇸 UNS | S31703 |
| 🇪🇺 EN | EN 1.4438 |
| 🇩🇪 DIN | 1.4438 / X2CrNiMo18-14-4 |
| 🇯🇵 JIS | SUS 317L |
Химический Состав
| Элемент | Значение |
|---|---|
| C | ≤ 0.030 |
| Mn | ≤ 2.00 |
| Si | ≤ 1.00 |
| P | ≤ 0.045 |
| S | ≤ 0.030 |
| Cr | 18.00 – 20.00 |
| Ni | 11.00 – 15.00 |
| Mo | 3.00 – 4.00 |
| N | ≤ 0.10 |
| Cu | ≤ 1.00 |
| Nickel + Copper (Ni+Cu) | ≤ 16.00 |
| Iron (Fe) | Remainder |
Механические Свойства
| productCenter.property | Значение |
|---|---|
| Tensile Strength (MPa) | 485 |
| Yield Strength (MPa, 0.2% offset) | 170 |
| Elongation (%) | 40 |
| Reduction of Area (%) | — |
| Hardness (HB) | ≤ 217 |
| Hardness (HRB) | ≤ 95 |
| Hardness (HV) | ≤ 225 |
Физические Свойства
| Свойство | Единица | Значение |
|---|---|---|
| Density (g/cm³) | g/cm³ | 8.00 |
| Melting Range (°C) | °C | 1,370 – 1,400 |
| Modulus of Elasticity (GPa) | GPa | 193 |
| Modulus of Rigidity (GPa) | - | 77 |
| Poisson's Ratio | - | 0.30 |
| Coefficient of Thermal Expansion (µm/m·°C, 20–100°C) | ×10⁻⁶/K | 15.7 |
| Coefficient of Thermal Expansion (µm/m·°C, 20–316°C) | ×10⁻⁶/K | 16.8 |
| Coefficient of Thermal Expansion (µm/m·°C, 20–538°C) | ×10⁻⁶/K | 18.0 |
| Thermal Conductivity (W/m·K, 25°C) | W/m·K | 15.2 |
| Thermal Conductivity (W/m·K, 500°C) | W/m·K | 22.9 |
| Electrical Resistivity (nΩ·m, 25°C) | μΩ·cm | 770 |
| Electrical Conductivity (% IACS) | - | 2.2 |
| Specific Heat (J/kg·K, 25°C) | J/kg·K | 500 |
| Magnetic Permeability (µ/µ₀) | - | < 1.02 (paramagnetic) |
Применение
- Chemical & Petrochemical Processing
- Flue Gas Desulfurization (FGD) & Power Generation
- Marine & Desalination
- Pharmaceutical & Food Processing
- Oil, Gas & Refining
- Waste Treatment & Mining
- General Industrial