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Help CenterIntenal 800 Steel Plate For High Temperature Furnace Tubes ASTM B409 Annealed Pickled Surface
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Zhongzheng Stainless Steel Co., Ltd., based in Tianjin, China, is a reliable supplier of high-quality specialty steel products serving global markets including North America, Europe, Southeast Asia, and the Middle East. Our ASTM B409 Alloy 800 Steel Plate with annealed pickled surface is specifically engineered for high-temperature furnace tube applications, combining excellent oxidation resistance with robust mechanical strength. Designed to perform in demanding thermal environments, this plate offers a balance of corrosion resistance and fabricability, making it a preferred choice for industries such as petrochemical, power generation, and industrial furnace manufacturing.
Alloy 800 (UNS N08800) is a nickel-iron-chromium alloy that maintains structural integrity at elevated temperatures up to 1000°C (1832°F). The annealed pickled finish ensures a clean, oxide-free surface that enhances welding and forming operations. Below are detailed features and benefits of our product:
- High Temperature Stability: Resists scaling and carburization in cyclic heating conditions, ideal for furnace tubes and radiant tubes.
- Oxidation & Corrosion Resistance: Chromium content (19–23%) provides protection against oxidizing atmospheres, while nickel (30–35%) offers resistance to reducing environments.
- Fine Grain Microstructure: Annealing process optimizes grain size for improved creep strength and creep rupture life at high temperatures.
- Pickled Surface: Free from mill scale and surface contaminants, ready for immediate fabrication or welding without additional cleaning.
- Excellent Weldability: Suitable for TIG, MIG, and resistance welding; no pre- or post-weld heat treatment typically required.
- Dimensional Consistency: Rolled to tight tolerances per ASTM B409, ensuring uniform thickness and flatness for tube forming.
- Customizable Sizes: Available in thickness from 1.5 mm to 50 mm, width up to 2500 mm, and length as required, with further cutting or machining services.
Typical chemical composition and mechanical properties are summarized below:
| Element | Composition (wt%) |
|---|---|
| Nickel (Ni) | 30.0 – 35.0 |
| Chromium (Cr) | 19.0 – 23.0 |
| Iron (Fe) | Balance |
| Carbon (C) | ≤0.10 |
| Manganese (Mn) | ≤1.50 |
| Silicon (Si) | ≤1.00 |
| Property | Typical Value |
|---|---|
| Tensile Strength (MPa) | ≥450 |
| Yield Strength (MPa) | ≥170 |
| Elongation (%) | ≥30 |
With a strong track record of supplying to more than 15 global market regions, Zhongzheng Stainless Steel Co., Ltd. ensures each plate undergoes strict incoming material inspection, process control, and final dimensional verification. Our experienced team supports with technical documentation, mill test certificates, and tailored packaging for export. The ASTM B409 Alloy 800 plate with annealed pickled surface offers a reliable solution for OEMs and fabricators who demand performance in high-temperature furnace tube applications. Contact us today for competitive pricing, prompt delivery, and professional service — your trusted partner for specialty alloy products.
Frequently Asked Questions
- Q: What does ASTM B409 cover? A: ASTM B409 is the standard specification for nickel-iron-chromium alloy plate, sheet, and strip (Alloy 800/UNS N08800) intended for high-temperature service.
- Q: Why is the annealed pickled surface recommended for furnace tubes? A: The annealed pickled finish removes mill scale and improves surface cleanliness, which enhances weld quality and corrosion resistance during tube fabrication.
- Q: Can this plate be used for temperatures above 1000°F? A: Yes, Alloy 800 is designed for continuous service up to about 1832°F (1000°C) under oxidizing conditions, making it suitable for furnace tubes.
- Q: What thickness and sizes are available? A: We offer thicknesses from 1.5 mm to 50 mm, widths up to 2500 mm, and custom lengths. Please inquire for specific requirements.
- Q: Is the material suitable for welding without post-weld heat treatment? A: Generally, Alloy 800 does not require preheating or post-weld heat treatment, but it is advisable to follow standard welding procedures for nickel alloys.
- Q: Do you provide mill test certificates? A: Yes, we supply EN 10204 3.1 or 3.2 mill test certificates upon request, confirming chemical and mechanical properties.
- Q: What is the typical lead time for this product? A: Lead time depends on thickness and quantity; standard sizes can be shipped within 15–20 days after order confirmation.
- Q: Can this plate be cut or machined into smaller pieces? A: Yes, we offer plasma cutting, shearing, and machining services to produce custom dimensions for your furnace tube project.
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