ASTM B443 N06625, widely recognized as Inconel 625, is a nickel-based alloy plate valued for its superior corrosion resistance and high-temperature performance. According to the ASTM B443 standard, this alloy is supplied in two distinct heat-treated conditions-Grade 1 (annealed) and Grade 2 (solution-annealed)-each tailored for specific service environments.
Technical Data Sheet
| Chemical Composition Limits | |||||||||||||
| Weight % | Ni | Cr | Mo | Nb + Ta | Fe | Ti | C | Mn | Si | S | P | Al | Co |
| Alloy 625 | 58.0 min | 20 - 23 | 8 -10 | 3.15 -4.15 | 5.0 max | 0.40 max | 0.10 max | 0.50 max | 0.50 max | 0.15 max | 0.15 max | 0.40 max | 1.0 max |
| Material | Form and Condition | Tensile Strength MPa | Yield Strength (0.2% Offset) MPa | Elongation 4D(%) | Hardness HB | ||
| Ksi | MPa | Ksi | MPa | ||||
| Alloy 625 Bar | Annealed | 120 | 827 | 60 | 414 | 30 | ≤ 287 HB |
| Alloy 625 Sheet | Annealed | 120 | 827 | 60 | 414 | 30 | 145-240 |
| Alloy 625 Tube Seamless and Welded |
Annealed | 120 | 827 | 60 | 414 | 35 | - |
Heat Treatment of ASTM B443 N06625 Nickel Alloy Plate
Grade 1 (Annealed): This condition involves annealing at approximately 871°C (1600°F) or higher, followed by rapid cooling. It provides excellent ductility and formability, making it suitable for applications up to 593°C (1100°F). Grade 1 offers a minimum tensile strength of 930 MPa and yield strength of 430 MPa, with high toughness even at low temperatures. It is ideal for marine and chemical processing environments where corrosion resistance and ease of fabrication are critical.
Grade 2 (Solution-Annealed): Achieved by heating to around 1093°C (2000°F) followed by rapid quenching, this treatment enhances creep and rupture strength for service above 593°C. It is designed for high-temperature applications, such as aerospace turbine components and exhaust systems, where prolonged exposure to elevated temperatures is common. The solution-annealed condition maintains the alloy's corrosion resistance while improving its performance under thermal stress.
Both heat treatments ensure Inconel 625's versatility, with no need for precipitation hardening. The choice between Grade 1 and Grade 2 depends on the operating temperature and mechanical demands of the application. Suppliers provide these plates in various thicknesses, certified to ASTM B443 standards, ensuring reliability in critical industries.
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FAQ
Q: What is the ASTM standard for Inconel 625?
A: Inconel 625 Welded Pipes are a superalloy that has been solid solution strengthened for use in both elevated temperature and high pressured applications. The pipes produced under ASTM B444 UNS N06625 specification often indicates that these pipes have a seamless construction.
Q: What is the grade of N06625 material?
A: INCONEL nickel-chromium alloy 625 (UNS N06625/W.Nr. 2.4856) is used for its high strength, excellent fabricability (including joining), and outstanding corrosion resistance. Service temperatures range from cryogenic to 1800°F (982°C).
Q: What material is ASTM B444 uns N06625?
A: Inconel alloy 625
The alloy 625 tubes, which are widely used for superheater or heat exchanger tubing, are generally manufactured as per ASTM B444 (ASME SB-444) UNS N06625. It is a typical nickel-chromium-molybdenum-columbium alloy, which is commercially known as a proprietary brand of "Inconel alloy 625".
Q: What is the difference between N08825 and N06625?
A: Inconel 625 VS Incoloy 825 (UNS N06625 VS UNS N08825)
The major difference between two materials is the nickel content value, for Inconel 625 Nickel 58% minimum, and for Incoloy 825 Nickel at range of 38% to 46%. And this makes the 625 material more expensive.
| Other steel plate | ||||
| Name | Material | Specification (mm) | Tons | Remark |
| Low Alloy | Q345A, Q345B, Q345C, Q345D, Q345E, Q390, Q420, Q460C, ST52-3, S355J2+N, SS400, SA302GrC, S275NL, 35CrMo | 6 - 350 | 5788.56 | Normalizing, tempered ,controlled rolling, hot rolling , Hot rolling,1st inspection, 2nd inspection, 3rd inspection |
| Pressure Vessel Plate | Q245R, Q345R, Q370R, 16MnDR, 09MnNiDR, 15CrMoR, 14Cr1MoR, 12Cr2Mo1R, SA516Gr60, SA516Gr70, SA516Gr485, SA285, SA387Gr11, SA387Gr12, SA387Gr22, P265,P295,P355GH,Q245R(R-HIC),Q345R(R-HIC) | 3 - 300 | 8650 | Normalizing, tempered ,controlled rolling, hot rolling , Hot rolling,1st inspection, 2nd inspection, 3rd inspection |
| High-Strength Plate | WH785D/E,Q960D/E, Q890D/E,WH60D/E,WH70B,Q550D,Q590D,Q690D/E | 8 - 120 | 3086.352 | Quenched and tempered |
| Wear-Resistant Plate | NM360, NM400, NM450, NM500 | 6 - 150 | 3866.297 | Quenched and tempered |
| Bridge Plate | Q235qC, Q345qC, Q370qC, Q420qC, Q345qDNH, Q370qDNH, A709 - 50F - 2, A709 - 50T - 2 | 8 - 200 | 2853.621 | Hot rolling, normalized ,hot rolling controlled rolling, quenched and tempered + toughness and brittleness |
