Leading Thermal Processing Alloys Manufacturer in China
Thermal processing equipment usually fails with some very distinct characteristics, such as radiant tubes become thinner caused by oxidation, pallets and baskets deform caused by repeated heating, muffle tanks and boxes crack due to thermal fatigue at welds and corners, and fixtures may look good but actually lose their strength already. SparkX focuses on these common problems in Thermal Processing equipment and provides our products with high quality and optimized for these problems. Such as bars for clamps, shafts, and thermal fasteners, wires for springs and formed hot zone parts, strips and coils for seals, shields, and molded internals, and cold worked profiles for rails, hooks and special cross sections. With our bars, wires, precision wires and cold worked profile capabilities ensure your equipment maintains stable thermal response, surface integrity and continuous thermal cycling.
Related Grades of Thermal Processing
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High chromium nickel stainless steel has excellent oxidation resistance and structural stability, suitable for continuous furnace and heat treatment applications.
Titanium stabilized stainless steel resistant to post weld sensitization, can maintain corrosion resistance in heating process lines and thermal cycles.
Niobium stabilized stainless steel with excellent intergranular corrosion resistance and reliable high temperature stability and suitable for welding equipment.
High temperature alloy has excellent oxidation resistance and good machinability, ideal choice for furnace parts, high temperature gas piping and burner parts.
Nickel alloy has excellent oxidation resistance, corrosion resistance and weldability ideal for harsh heat treatment environments.
High strength precipitation hardening high temperature alloy has excellent fatigue and creep resistance, suitable for high temperature and high load parts.
Heat treatable nickel alloy used for fasteners, springs and valves for theri oxidation resistance and high temperature strength.
Oxidation and Scale Growth in Furnace
In thermal processing, oxidation is not a little problem. It not only changes the surface color, but the scale will also gradually erode the wall thickness of radiant tubes, furnace parts, furnace cover and supports. Once the oxide layer begins to peel off, it will cause downstream pollution and localized overheating. So when you choosing an alloy, you should’t just choose the one with the highest temperature resistance, but also should can maintain its scale and section thickness for a long time at some furnace temperatures. For carburizing, neutral quenching and general high temperature oxidation applications, SparkX typically recommends 310S, 321 and 347, these are commonly used for welded and formed furnace parts. When higher temperature stability and stronger hot gas corrosion margin are required, alloys such as Hastelloy X and Inconel 625 are more suitable for you. SparkX has focused on special alloys over 35years, and both have 40+ R&D team can ensure that the bars, strips and profiles perfectly support your equipment, and ensure surface integrity and dimensional stability, avoid scale detachment for high temperature parts.
Distortion and Creep in Trays
The biggest problem of many heat treated parts is not breakage, but rather gradual deformation. Prolonged, repeated thermal cycling at high temperatures leads to thermal deformation and creep. For example, furnace trays may sag, fixtures may exceed tolerances, the heat treatment furnace may lose flatness, and hangers may not bear weight evenly. So the truly important is not tensile strength at room temperature, but the ability to retain strength at high temperatures. For some hardware that subjected to high temperatures, SparkX recommends Nimonic 80A, Inconel 718, and other high strength high temperature alloys compared to ordinary stainless steel. SparkX provides alloys include but not limited to these grades, provides bars, wires, and profiles with excellent thermal response and formability to help reduce creep and thermal deformation, ensuring the smooth operation of parts that require repeated heat treatment, such as baskets, hangers, rails, hooks and high temperature fasteners.
Weld Cracking and Thermal Fatigue at Cyclic Hot Zones
For industrial furnaces and circulating heat treatment lines that often frequent start ups and shutdowns, the biggest problem is cracks at weld toes, elbows, variable cross sections and connection points, these all require much maintenance costs. These cracks are often not caused by simple overload, but rather by thermal gradients and repeated expansion and contraction can amplify small cracks. So you not only focus on choosing the suitable grade, but production quality is also very important. Stabilized stainless steels like 321 and 347 are commonly used for welding high temperature parts, improving post weld stability and reducing the risk of sensitization. If higher cycling strength is required, nickel based alloys are a good choice. SparkX provides cleaner and more stable processing materials for you high temperature cycling equipment, including wire, strip and profiles, helping you reduce heat input deviations and rework, and more stable weld performance.
Because creep and thermal distortion start long before fracture.
Both important.
