446 Stainless Steel Fittings: High-Temperature Performance and Exceptional Durability
Meta Description
Discover the best 446 stainless steel fittings for high-temperature applications. Offering unmatched oxidation resistance, excellent durability, and a cost-effective alternative to 310/309 fittings.
Introduction
When it comes to high-temperature environments, 446 stainless steel fittings are the go-to choice for industries requiring extreme resistance to oxidation and scaling. With an impressive maximum continuous service temperature of 1150°C, these fittings are built to endure the harshest conditions without compromising performance. Whether you're dealing with furnace systems, thermal oxidizers, or cement kilns, 446 stainless steel fittings offer the durability and reliability you need to ensure your systems run smoothly and efficiently.
One of the major advantages of 446 stainless steel is its 30–50% cost saving compared to other high-temperature grades like 310 and 309. With superior scaling resistance and excellent performance in sulfidation and carburization environments, 446 stainless steel fittings deliver outstanding value for a wide range of industrial applications.
At [Your Company Name], we pride ourselves on being the global No.1 446 stainless steel fittings supplier. Our 446 stainless steel pipe fittings are known for their exceptional quality and high-temperature resistance, making them the preferred choice for industries worldwide.
Product Overview & Extreme Advantages
- Exceptional Scaling Resistance: 446 stainless steel fittings can withstand continuous service temperatures up to 1150°C, making them ideal for environments exposed to extreme heat, such as furnaces and thermal oxidizers.
- Cost-Effective: Compared to more expensive high-temperature alloys like 310 and 309, 446 fittings provide a 30–50% cost saving without sacrificing performance or durability.
- Excellent Sulfidation & Carburization Resistance: Perfect for industries dealing with highly corrosive atmospheres, including cement kilns, furnaces, and pyrolysis equipment.
- Durable Ferritic Structure: The ferritic composition of 446 stainless steel makes it less susceptible to phase changes at high temperatures, offering superior strength and longevity in high-stress applications.
- Versatile Applications: From furnace fittings and kiln tube connections to glass lehr rollers and thermal oxidizer piping, 446 stainless steel fittings are the ideal solution for any high-temperature system.
- Availability & Stock: We maintain a vast inventory of 446 stainless steel fittings in various sizes and configurations, ensuring rapid delivery for your project needs.
Chemical Composition
| Element | Content (%) |
|---|---|
| Chromium (Cr) | 23–27 |
| Carbon (C) | ≤ 0.20 |
| Nickel (Ni) | ≤ 0.75 |
| Manganese (Mn) | ≤ 1.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.030 |
| Nitrogen (N) | ≤ 0.25 |
Mechanical Properties
| Property | Room Temp | 600°C | 800°C | 1000°C |
|---|---|---|---|---|
| Tensile Strength (MPa) | 510–690 | 460–620 | 400–540 | 350–500 |
| Yield Strength (MPa) | 290–520 | 230–400 | 190–320 | 150–270 |
| Elongation (%) | ≥ 18 | ≥ 12 | ≥ 8 | ≥ 6 |
| Hardness (HB) | 170–220 | 150–200 | 130–170 | 120–150 |
High-Temperature Oxidation & Scaling Resistance
| Temperature (°C) | Continuous Limit (hrs) | Weight Gain (mg/cm²) | Intermittent Limit (hrs) | Weight Gain (mg/cm²) |
|---|---|---|---|---|
| 900 | 500 | 5 | 50 | 10 |
| 1000 | 1000 | 8 | 100 | 15 |
| 1100 | 1200 | 10 | 120 | 20 |
| 1150 | 1500 | 12 | 150 | 25 |
446 vs 310 vs 309 vs 304H vs 321 Fittings Comparison
| Property | 446 Stainless Steel | 310 Stainless Steel | 309 Stainless Steel | 304H Stainless Steel | 321 Stainless Steel |
|---|---|---|---|---|---|
| Max Service Temp (°C) | 1150 | 1150 | 1100 | 870 | 900 |
| Creep Resistance | Excellent | Good | Good | Fair | Fair |
| Thermal Fatigue | Excellent | Good | Good | Fair | Good |
| Cost | 30–50% less | High | High | Moderate | Moderate |
| Availability | High | High | High | Very High | Very High |
Available Types & Specifications
- Buttweld Fittings: Elbow, Tee, Reducer, Cap, Stub End (Seamless & Welded)
- Forged Threaded & Socket Weld Fittings: Elbow, Tee, Cross, Coupling, Union, Plug
- Size: 1/2″–48″ (BW) | 1/8″–4″ (Forged)
- Pressure: Sch 10S–XXS | 2000#–9000#
- Standards: ASTM A403 WP446, A182 F446, ASME B16.9, B16.11, MSS SP-43/75/79/83/95/97
- Surface: Pickled, Shot-Blasted, Annealed & Pickled
High-Temperature Performance Guide
- Scaling Curves: The 446 stainless steel fittings provide superior scaling resistance at temperatures up to 1150°C, making them perfect for furnace and kiln applications.
- Sulfidation & Carburization Resistance: Excellent resistance to sulfidation and carburization at elevated temperatures.
- Support Spacing: At 1000°C, the recommended support spacing is 1.2 meters for optimal structural integrity.
Major Applications
- Furnace Fittings
- Kiln Tube Connections
- Radiant Tube Elbows
- Recuperator Fittings
- Soot-Blower Piping
- Pyrolysis Coil Fittings
- Cement Kiln Inlet Fittings
- Glass Lehr Rollers & Connections
- Burner Nozzle Fittings
- Heat Exchanger Tube-to-Tubesheet Fittings
- Thermal Oxidizer Piping
- Refinery Heater Fittings
Product Images
Large-diameter pickled 446 stainless steel buttweld elbows and tees ready for high-temperature service
Professional infographic 446 stainless steel fittings data sheet + oxidation resistance curve up to 1200°C
Real-installation collage – 446 fittings in furnace radiant sections, recuperators, cement kiln environments, and thermal oxidizer systems
Why We Are the Best 446 Stainless Steel Fittings Distributor
- Largest Ex-Stock Holder of rare 446 high-temp fittings.
- Direct Mill Contracts to ensure consistent quality and availability.
- In-House Pickling & Solution Annealing to ensure optimal material performance.
- 100% Ultrasonic & Radiographic Testing to guarantee the integrity of every fitting.
- Full EN 10204 3.1/3.2 + PED 2014/68/EU Compliance.
- Custom Machining & Small-Batch Production to meet your specific requirements.
- Fastest Worldwide Export with flexible delivery options.
- Most Competitive 446 Stainless Steel Fittings Price.
Packaging & Quality Assurance
- Heavy Wooden Cases for secure transport.
- Steel Cradles and End Protectors to protect the fittings during transit.
- Full Certification Package, including all relevant documents for quality assurance and regulatory compliance.
FAQ Section
1. What is the maximum continuous service temperature for 446 fittings?
The maximum continuous service temperature for 446 fittings is 1150°C, making them suitable for extreme high-temperature applications.
2. Are 446 fittings magnetic?
Yes, 446 stainless steel fittings are magnetic due to their ferritic structure.
3. How do 446 and 310 fittings compare?
446 fittings offer similar oxidation resistance and scaling resistance at 1150°C, but at a 30–50% lower cost than 310 fittings.
4. Can 446 fittings be welded and what filler should be used?
Yes, 446 fittings can be welded using E308L-16 or E310-16 filler rods. Preheating and post-weld heat treatment (PWHT) are recommended.
fittings** can be welded using E308L-16 or E310-16 filler rods. Preheating and post-weld heat treatment (PWHT) are recommended.
5. Does 446 suffer from sigma-phase embrittlement? No, 446 stainless steel does not suffer from sigma-phase embrittlement like austenitic stainless steels.
6. What is the recommended preheat & PWHT for 446 fittings? A preheat temperature of 150–250°C is recommended, followed by PWHT at 800–900°C.
7. What is the creep strength of 446 fittings at 900°C? 446 fittings offer excellent creep strength at 900°C, making them ideal for high-temperature, long-duration service.
8. What is the minimum order quantity for 446 fittings? We can accommodate both large and small orders, with a minimum order quantity of 50 pieces for most standard fittings.
9. What is the lead time for Sch 80 buttweld 446 elbows? The standard lead time for Sch 80 buttweld 446 elbows is 2–3 weeks, depending on your specific order size and customization.
10. Are 446 fittings NACE compliant? Yes, 446 fittings can be manufactured to meet NACE MR0175 for sour service environments.
11. How does 446 compare to 310 in sulfidation environments? 446 fittings offer superior sulfidation resistance compared to 310 fittings, making them ideal for environments with high sulfidation.
12. Can 446 fittings be used in carburizing atmospheres? Yes, 446 stainless steel fittings offer good resistance to carburization at high temperatures.
Conclusion + Urgent Call-to-Action
For the highest-quality 446 stainless steel fittings, trusted by industries worldwide, look no further than [Your Company Name]. We offer the best 446 stainless steel fittings price, unmatched service, and the fastest delivery times. Whether you need buttweld, threaded, or socket weld fittings, we have the stock and expertise to fulfill your order.
Get in touch today for an instant quote within 1 hour. Our customer support team is available 24/7 via WhatsApp, WeChat, email, phone, or live chat. Choose the No.1 446 stainless steel fittings distributor for your high-temperature applications!