Inconel alloy 625 plates possess excellent corrosion resistance, high-temperature mechanical stability, and superior processing performance. Its American standard designation is UNS N06625, and its German standard designation is W.Nr.2.4856. It achieves a balance of corrosion resistance and strength without the need for aging treatment, making it suitable for demanding applications in various scenarios.
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alloy 625 material Physical Properties
Density 8.4 g/cm³, melting point 1290-1350℃, coefficient of thermal expansion from room temperature to 1000℃ is 13.1-13.4 × 10⁻⁶/℃, with superior thermal stability compared to conventional stainless steel.
incoloy 625 Mechanical Properties
In the solution-annealed state, tensile strength ≥760 MPa, yield strength ≥345 MPa, elongation ≥30%, hardness ≤220 HB, tensile strength remains above 600 MPa at 800℃, and performance is stable across a wide temperature range from -200℃ to 980℃.
inconel alloy 625 Corrosion Resistance
Pitting resistance equivalent number (PREN) value is as high as 45, far exceeding 316 stainless steel. Inconel 625 plates is resistant to corrosion from seawater, chlorides, nitric acid, sulfuric acid, and other media. In strong oxidizing environments containing fluoride ions, the corrosion rate is only 1/3 of that of Hastelloy C276, and there is no risk of chloride stress corrosion cracking.
b564 uns n06625 Oxidation Resistance
Forms a dense Cr₂O₃-Al₂O₃ oxide film in static air at 900℃, with an annual oxidation rate ≤0.01 mm. After 1000 thermal cycles from 800℃ to room temperature, the bending strength reduction rate is <5%.
nickel 625 Processing Characteristics
Hot Working: Recommended temperature range is 920-1150℃. Forging ratio can reach 5:1 without cracking. Thick plates should use stepped heating (600℃→800℃→1050℃) to ensure complete solid solution in the core.
Cold Working: Cold work hardening rate (n value) is 0.35. The first cold rolling deformation should be ≤20%, with subsequent passes decreasing to 10%. Intermediate annealing can fully restore plasticity.
Welding Process: Suitable for GTAW welding. Recommended filler wire is ERNiCrMo-3, current 80-150A (plate thickness 3-12mm), interpass temperature ≤150℃,post-weld annealing at 870℃ to relieve stress. Joint strength reaches over 90% of the base metal, with no susceptibility to post-weld cracking.
Heat Treatment: Standard solution treatment is 980-1065℃ for 1-2 hours followed by water quenching. For thick plates, the holding time is extended to 3 hours. The process can be optimized according to requirements (1050℃ high-temperature solution treatment for low-temperature corrosion resistance, and 980℃ medium-temperature solution treatment for high-temperature strength requirements).
