ASTM B444 Seamless Inconel 625 Alloy Pipe and Tube
- Type: Seamless Pipe and Tube
- NiCrMoNb Alloy, NiCrMoSi Alloy
- Grade: UNS N06625, UNS N06852, UNS N06219
- Outside Diameter (OD): NPS 1/4″ -3″
- Wall Thickness (WT): SCH10, SCH40, SCH80
ASTM B444 Seamless NiCrMoNb Inconel 625 and NiCrMoSi Alloy Pipe & Tube
Golden Sunbird Metals supplies ASTM B444 seamless Inconel 625 alloy pipe and tube for demanding service conditions where strength, corrosion resistance, and long-term reliability are critical. Manufactured from nickel-chromium-molybdenum alloy 625, these pipes and tubes offer excellent resistance to pitting, crevice corrosion, oxidation, and a wide range of severe chemical environments. They are widely used in offshore engineering, chemical processing, marine systems, heat exchangers, pollution control equipment, and high-temperature applications. With outstanding mechanical properties from cryogenic to elevated temperatures, ASTM B444 Inconel 625 seamless pipe and tube is a trusted choice for projects requiring superior performance and durability. Golden Sunbird Metals provides a full range of sizes, strict quality control, and flexible supply solutions to meet international standards and project specifications. Whether for industrial plant construction, maintenance, or custom fabrication, our ASTM B444 Inconel 625 products deliver dependable performance for the most challenging applications.
Chemical Composition (wt.%) of ASTM B444 Seamless Inconel 625 Alloy Pipe and Tube
| UNS No. | (Ni) (%) | (Cr) (%) | (Fe) (%) | (Mo) (%) | (Nb) (%) | (Ta) (%) | (Al) (%) | (Ti) (%) | (Co) (%) | (C) (%) | (Mn) (%) | (Si) (%) | (P) (%) | (S) (%) |
| N06625 | 58.0 min | 20.0-23.0 | 5.0 max | 8.0-10.0 | 3.15-4.15 | – | 0.4 max | 0.4 max | – | 0.1 max | 0.5 max | 0.5 max | 0.015 max | 0.015 max |
| N06852 | 58.0 min | 22.0-24.0 | 5.0 max | 9.0-11.0 | – | – | 0.2 max | 0.6 max | – | 0.03 max | 0.5 max | 0.5 max | 0.015 max | 0.01 max |
| N06219 | 52.5 min | 20.0-23.0 | 2.0 max | 9.0-10.5 | – | – | 0.5 max | 0.15-0.60 | 0.50 max | 0.040 max | 1.0 max | 0.50 max | 0.030 max |
Mechanical Properties of ASTM B444 Seamless Inconel 625 Alloy Pipe and Tube
| Alloy | Tensile Strength (MPa) | Yield Strength (0.2% Offset) (MPa) | Elongation (%) |
| UNS N06625 | 760 min | 345 min | 30 min |
| UNS N06852 | 880 min | 620 min | 30 min |
| UNS N06219 | 1100 min | 760 min | 25 min |
Features
- ASTM B444 seamless cold-worked nickel-chromium-molybdenum-columbium alloy pipe and tube for corrosive and high-temperature service.
- Available in UNS N06625, UNS N06852, and UNS N06219 under the ASTM B444 scope.
- INCONEL alloy 625 offers an excellent combination of high strength and corrosion resistance.
- Grade 1 and Grade 2 options are available for UNS N06625; UNS N06852 and UNS N06219 are supplied in solution-annealed condition only.
- Suitable for pressure piping, process tubing, and demanding fabricated components in aggressive environments.
Technical Specifications
| Specification | Value |
| Standard | ASTM B444 Nickel-Chromium-Molybdenum-Niobium Alloys and Nickel-Chromium-Molybdenum-Silicon Alloy Pipe and Tube |
| Grade | UNS N06625 (Inconel 625, Alloy 625, EN 2.4856), UNS N06852, UNS N06219 |
| Manufacturing Process | cold-finished of hot-finished |
| Seam Type | Seamless |
| Pipe Size | Outside Diameter (OD): NPS 1/4″ -3″, Wall Thickness (WT): SCH10, SCH40, SCH80 |
| Tube Size | Outside Diameter (OD): 13.72 -88.9mm, Wall Thickness (WT): 1.65-7.62mm |
| Length | 6000-12000mm |
| Delivery Condition | UNS N06625 is in annealed Grade 1, and solution annealed Grade 2; UNS N06219 and UNS N06852 are in the solution annealed condition |
| Inspection Certificate | EN 10204 Type 3.1 (Mill Test Certificate), EN 10204 Type 3.2 (Witness Testing or 3rd Party Inspection) |
| Test | Chemical analysis, Tensile test, Flattening test, Expansion test, Hydrostatic test, Nondestructive testing (NDE Test), Intergranular corrosion test, Metallographic examination |
Applications
- Chemical processing equipment, including reactors, distillation columns, heat exchangers, transfer piping, and valves.
- Corrosive process tubing and piping in chloride-bearing and acid environments.
- Nuclear service, including reactor-core and control-rod components and high-purity water systems.
- Marine and offshore equipment exposed to severe corrosion.
- High-strength components where weldability and long-term corrosion resistance are critical.
