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ASTM B444 GR.2 INCONEL 625 (NO6625) DIN 2.4856 NICKLE ALLOY SMLS PIPE
In ASTM B444, the specification specifically applies UNS N06852 and UNS N06219 for delivery in the solution-treated state. Regarding Inconel 625 (UNS N06625), the specification outlines two states:
Grade 1 (Annealed): Grade 1 refers to the annealed state of Inconel 625. It is stronger and suitable for use at temperatures up to 1100°F (593°C). Grade 1 is typically the default delivery state for Inconel 625 seamless pipes and tubes. It is commonly used in applications where high corrosion resistance is required at moderately elevated temperatures.
Grade 2 (Solution Annealed): Grade 2 corresponds to the solution annealed state of Inconel 625. This state is recommended when the material is intended for use above 1100°F (593°C). Grade 2 helps to improve the creep and fatigue properties of the alloy, making it suitable for high-temperature applications. If you have the need for Inconel 625 seamless pipes and tubes to be used at higher temperatures, Grade 2 is the appropriate choice.
Specification
Size | 6.00 mm OD up to 914.4 mm OD |
Thickness | 0.3mm – 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS |
Length | Single Random, Double Random & Cut Length |
Type | Seamless Pipes, Seamless Tubes |
Grades | UNS N06625, N06852, and N06219 |
Equivalent Grades for Inconel Alloy 625 Tubes
STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
Inconel 625 | 2.4856 | N06625 | NCF 625 | NA 21 | ХН75МБТЮ | NC22DNB4M | NiCr22Mo9Nb |
Chemical Composition
Grade | C | Mn | Si | S | Cu | Fe | Ni | Cr |
Inconel 625 | 0.10max | 0.50 max | 0.50 max | 0.015max | – | 5.0 max | 58.0 min | 20.0 – 23.0 |
Mechanical Properties
Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
Inconel 625 | 8.4 g/cm3 | 1350 °C (2460 °F) | Psi – 1,35,000 , MPa – 930 | Psi – 75,000 , MPa – 517 | 42.5 % |
Here are some key features and characteristics of ASTM B444 Gr.2 Inconel 625 pipes:
Corrosion Resistance: Inconel 625 pipes exhibit exceptional resistance to a wide range of corrosive environments, including seawater, acidic solutions, and oxidizing/reducing conditions.
High Strength: These pipes offer high tensile strength, making them suitable for demanding applications that require robustness and structural integrity.
Heat Resistance: Inconel 625 pipes can withstand elevated temperatures and retain their mechanical properties even under thermal stress. They can be used in both cryogenic and high-temperature environments.
Versatility: The alloy has good weldability and can be easily formed and fabricated into various shapes, making it versatile for different applications.
Application Areas: ASTM B444 Gr.2 Inconel 625 pipes are commonly used in industries like chemical processing, oil and gas, marine engineering, power generation, aerospace, and pollution control.
Applications
1.Aircraft ducting systems
2. Aerospace
3. Jet engine exhaust systems
4. Engine thrust-reverser systems
5. Specialized seawater equipment
6. Chemical process equipment
