310S Stainless Steel Powder
310S Stainless Steel Powder is a high-alloy austenitic chromium-nickel stainless steel powder specifically designed for extreme high-temperature applications. With its exceptional oxidation resistance, corrosion resistance, and outstanding creep strength, it is the material of choice for components operating in severe thermal environments up to 1150°C (2100°F) continuously.
Core Characteristics
- Ultra-High Temperature Capability: Continuous service up to 1150°C, short-term exposure to 1200°C
- Exceptional Oxidation Resistance: Forms a protective, adherent chromium oxide scale that resists spalling even under thermal cycling
- Superior Corrosion Resistance: Excellent resistance to sulfidation, carburization, and various aggressive chemical environments
- High Creep Strength: Maintains structural integrity and dimensional stability under prolonged high-temperature stress
- Good Thermal Shock Resistance: Withstands rapid temperature changes without cracking or failure
Typical Chemical Composition (wt.%)
表格
| Element | Content Range (%) | Function |
|---|---|---|
| Chromium (Cr) | 24.0 – 26.0 | Provides oxidation resistance, forms protective scale |
| Nickel (Ni) | 19.0 – 22.0 | Stabilizes austenitic structure, enhances high-temperature strength |
| Carbon (C) | ≤ 0.08 | Strengthens at high temperatures, controlled to avoid sensitization |
| Silicon (Si) | ≤ 1.50 | Improves oxidation resistance, deoxidizer |
| Manganese (Mn) | ≤ 2.00 | Austenite stabilizer, improves hot workability |
| Phosphorus (P) | ≤ 0.035 | Impurity, requires strict control |
| Sulfur (S) | ≤ 0.030 | Impurity, requires strict control |
| Iron (Fe) | Balance | Base element |
📊 Mechanical Properties (Annealed Condition)
| Property | Typical Value | Standard |
|---|---|---|
| Tensile Strength | ≥ 520 MPa | ASTM A240 |
| Yield Strength | ≥ 205 MPa | ASTM A240 |
| Elongation | ≥ 40% | ASTM A240 |
| Hardness | ≤ 187 HB | ASTM E10 |
| Density | ~7.9 g/cm³ | — |
High-Temperature Performance
| Temperature | Tensile Strength | Creep Rupture Strength (1000h) |
|---|---|---|
| 800°C | ~250 MPa | ~80 MPa |
| 900°C | ~180 MPa | ~50 MPa |
| 1000°C | ~120 MPa | ~30 MPa |
| 1100°C | ~70 MPa | ~15 MPa |
Major Application Fields
- High-Temperature Furnace Components: Heating elements, radiant tubes, muffles, retorts, burner nozzles
- Petrochemical Industry: Catalytic reformer tubes, ethylene cracking furnace tubes, heat exchangers
- Power Generation: Boiler tubes, superheater components, gas turbine parts
- Aerospace: Jet engine components, exhaust systems, afterburner parts
- Heat Treatment Equipment: Fixtures, baskets, trays, conveyor systems
- Glass Manufacturing: Forehearth components, stirrers, thermocouple protection tubes
- Cement Industry: Kiln components, burner pipes, refractory anchors
310S vs 309S vs 316L vs 304L
| Feature | 310S | 309S | 316L | 304L |
|---|---|---|---|---|
| Chromium | 24-26% | 22-24% | 16-18% | 18-20% |
| Nickel | 19-22% | 12-15% | 10-14% | 8-12% |
| Molybdenum | None | None | 2-3% | None |
| Max Continuous Temp | 1150°C | 1000°C | 870°C | 870°C |
| Oxidation Resistance | Excellent | Very Good | Good | Good |
| Creep Strength | Excellent | Very Good | Moderate | Moderate |
| Cost | Highest | High | Moderate | Lower |
| Best For | Extreme high-temp | High-temp | Marine/Chemical | General purpose |
Heat Treatment & Processing
- Solution Annealing: 1040-1150°C followed by rapid cooling (water quench or air cool)
- No Hardening by Heat Treatment: Austenitic structure cannot be hardened; strengthening achieved through solid-solution strengthening
- Welding: Excellent weldability using matching filler metals (e.g., ER310); post-weld annealing recommended for critical applications
Additive Manufacturing Performance Parameters
| Parameter | Typical Value | Description |
|---|---|---|
| Particle Size Distribution | 15-53 μm | Optimized for SLM/DMLS processes |
| Sphericity | ≥95% | Ensures excellent flowability and packing density |
| Apparent Density | ≥4.0 g/cm³ | High powder density for efficient recoating |
| Tap Density | ≥4.8 g/cm³ | High packing efficiency |
| Oxygen Content | ≤0.1% | Low impurity for high-quality parts |
| Flowability | ≤20 s/50g | Excellent for automated powder handling |
Important Considerations for AM
Porosity Control: Dense parts (>99.5%) essential for high-temperature service to prevent oxidation penetration
Thermal Expansion: High coefficient of thermal expansion requires careful build orientation and support design
Residual Stress: High-temperature capability means parts may experience significant residual stresses; stress-relief annealing recommended
Surface Finish: May require post-processing (machining, polishing) for critical high-temperature applications
5. Customization Services by Forgecise
Forgecise provides comprehensive stainless steel powder customization solutions, covering the full range of products from standard grades to customer-specific formulations. We support mainstream grades such as 17-4PH, 15-5PH, 316L, 304L, 420, 440C, 13-8PH, and can adjust composition, particle size distribution, and sphericity according to your application requirements. Whether it’s small-batch samples for R&D (starting from 1kg) or ton-level orders for mass production, we ensure high purity, low oxygen content, and excellent flowability of our powders, meeting the requirements of various processes including SLM, EBM, MIM, and LMD.
