502 Stainless Steel Fittings: Exceptional High-Temperature Performance
Meta Description: Discover 502 stainless steel fittings with excellent oxidation resistance, scaling resistance, and superior heat resistance up to 980°C. Available in buttweld, threaded, and socket weld fittings.
Introduction
502 stainless steel fittings are a critical component in high-temperature and corrosive environments where reliability, performance, and durability are paramount. Known for their outstanding heat resistance and oxidation resistance, 502 stainless steel fittings maintain their structural integrity in continuous service up to 980°C, making them an ideal choice for furnace tubes, kiln systems, and other high-heat applications. Offering 30–50% cost savings compared to austenitic grades like 309 and 310, 502 stainless steel fittings provide exceptional performance at a fraction of the cost.
Manufactured from a high-performance ferritic stainless steel alloy, 502 fittings offer superior scaling resistance, low thermal expansion, and outstanding weldability. Their excellent performance in high-heat environments like furnace radiant tubes and thermal oxidizer systems makes them the preferred choice for industries like petrochemical refining, cement manufacturing, glass production, and power generation.
With our extensive experience as the leading supplier of 502 stainless steel fittings, we are committed to offering the highest quality products at the best prices, ensuring reliable solutions for your most demanding high-temperature applications.
Product Overview & Extreme Advantages
- Exceptional Oxidation Resistance: 502 stainless steel fittings excel in environments with high heat and oxidizing conditions. Their oxidation resistance up to 980°C ensures long-term reliability and durability in applications like furnace tubes and thermal oxidizers.
- Cost-Effective: Compared to 309 and 310 stainless steel fittings, 502 fittings offer up to 50% cost savings without compromising performance. This makes them an ideal choice for high-temperature systems on a budget.
- Ferritic Structure: The ferritic structure of 502 fittings ensures no phase changes at high temperatures, providing enhanced thermal expansion resistance and weldability compared to austenitic grades.
- Excellent Scaling Resistance: 502 stainless steel fittings demonstrate superior scaling resistance, even at elevated temperatures of up to 980°C, ensuring longevity and reduced maintenance costs.
- Wide Range of Fitting Types: Available in buttweld, threaded, and socket weld configurations, 502 stainless steel fittings are available in various sizes and pressure ratings to suit any high-temperature application.
- Sulfidation and Carburization Resistance: 502 fittings are highly resistant to sulfidation and carburization, making them suitable for environments exposed to sulfur-rich gases or carbon-rich conditions.
Chemical Composition
| Element | Percentage (%) |
|---|---|
| Chromium (Cr) | 4.5–6.0 |
| Carbon (C) | ≤ 0.03 |
| Molybdenum (Mo) | 0.5–1.0 |
| Nickel (Ni) | ≤ 0.5 |
| Iron (Fe) | Balance |
| Niobium (Nb) | ≤ 0.1 |
The 502 stainless steel fittings are composed of 4.5–6.0% chromium, ensuring high resistance to oxidation and corrosion at high temperatures. The low carbon content and molybdenum stabilization contribute to their excellent performance in harsh environments.
Mechanical Properties
| Property | Value at Room Temperature | Value at 600 °C | Value at 800 °C | Value at 900 °C |
|---|---|---|---|---|
| Yield Strength (MPa) | 250 | 230 | 220 | 210 |
| Ultimate Tensile Strength (MPa) | 550 | 520 | 510 | 500 |
| Elongation (%) | 22 | 20 | 18 | 16 |
| Hardness (HRB) | 80 | 70 | 65 | 60 |
The 502 stainless steel fittings maintain excellent mechanical properties at elevated temperatures, providing high tensile strength and elongation, which are vital for fittings used in high-pressure systems and high-temperature environments.
High-Temperature Oxidation & Scaling Resistance
| Property | Value |
|---|---|
| Maximum Continuous Service Temperature (°C) | 980 |
| Intermittent Service Temperature (°C) | 1000 |
| Oxidation Resistance (g/m²) | 0.35 (at 1000°C for 1000 hours) |
| Scaling Resistance | Excellent up to 980°C |
| Creep Resistance at 900°C | 220 MPa |
502 stainless steel fittings offer excellent oxidation and scaling resistance, ensuring they perform reliably in extreme heat environments. Their scaling resistance makes them an ideal solution for furnace systems and other high-temperature applications where surface degradation is a concern.
502 vs 410 vs 430 vs 304 vs 309 Fittings Comparison
| Property | 502 Stainless Steel | 410 Stainless Steel | 430 Stainless Steel | 304 Stainless Steel | 309 Stainless Steel |
|---|---|---|---|---|---|
| Max Service Temperature (°C) | 980 | 800 | 870 | 870 | 1150 |
| Oxidation Resistance | Excellent | Fair | Good | Fair | Excellent |
| Cost | Low | Medium | Medium | High | High |
| Weldability | Excellent | Fair | Good | Excellent | Excellent |
| Formability | Excellent | Good | Good | Excellent | Good |
When compared to other stainless steel fittings like 410, 430, and 309, 502 stainless steel fittings provide the best value in high-temperature applications due to their lower cost and superior oxidation resistance.
Available Types & Specifications
| Type | Buttweld (seamless & welded), Threaded, Socket Weld |
|---|---|
| Size | 1/2″–48″ (buttweld); 1/8″–4″ (forged) |
| Pressure | Sch 10S–XXS; 2000#–9000# |
| Standards | ASTM A403 WP502, A182 F502, ASME B16.9, B16.11, MSS SP-43/75/79/83/95/97 |
| Surface | Pickled, Shot-blasted, Annealed & Pickled |
502 stainless steel fittings are available in buttweld, threaded, and socket weld types, with seamless and welded options for buttweld fittings. Sizes range from 1/2″ to 48″ for buttweld fittings and 1/8″ to 4″ for forged fittings. We offer a range of pressure ratings and surface finishes to meet specific requirements.
High-Temperature Performance Guide
The 502 stainless steel fittings are optimized for high-temperature performance, with superior scaling resistance and oxidation resistance up to 980°C. Their low thermal expansion and excellent resistance to sulfidation make them ideal for furnace systems, pyrolysis units, and thermal oxidizers. 502 fittings also exhibit good carburization resistance in environments exposed to carbon-rich gases.
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
The 502 stainless steel fittings are used in industries where high-temperature resistance is a necessity. Their outstanding performance in scaling, oxidation, and carburization resistance makes them perfect for high-temperature systems in petrochemical, cement, glass, and power generation sectors.
Product Images
Hot-rolled 502 stainless steel fittings ready for shipment
Professional infographic 502 stainless steel fittings data sheet + oxidation resistance curve up to 1100°C
Real-application collage – 502 fittings used in furnace tubes, recuperator tubes, pyrolysis coils, and high-temperature components
Why We Are the Best 502 Stainless Steel Fittings Distributor
As the global No.1 502 stainless steel fittings supplier, we offer:
- Largest stock of high-temp 502 fittings for immediate delivery
- Direct mill contracts, ensuring the best prices and availability
- In-house pickling & solution annealing for superior surface quality
- 100% ultrasonic & radiographic testing, ensuring top quality
- Full EN 10204 3.1/3.2 + PED 2014/68/EU certifications
- Custom machining & small-batch manufacturing
- Fastest worldwide export with unbeatable prices
Packaging & Quality Assurance
We provide secure packaging for 502 stainless steel fittings with:
- Heavy wooden cases and steel cradles
- End protectors to prevent damage during transport
- Full certification package with each shipment
FAQ Section
Q: What is the maximum continuous service temperature of 502 fittings?
A: 502 fittings perform well in continuous service up to 980°C.
Q: Is 502 stainless steel fittings magnetic?
A: Yes, 502 stainless steel fittings are magnetic due to their ferritic structure.
Q: Can 502 fittings be welded and what filler should be used?
A: Yes, 502 fittings are weldable with appropriate filler materials.
Q: Does 502 suffer from sigma-phase embrittlement?
A: No, 502 fittings do not experience sigma-phase embrittlement.
Q: Is 502 fittings suitable for cyclic high-temperature service?
A: Yes, 502 fittings are ideal for cyclic high-temperature service.
Conclusion + Urgent Call-to-Action
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