ASTM B705 Welded UNS N06625, N08825 Alloy Pipe
- Grade: UNS N06625 UNS N06219 UNS N08825
- Outside Diameter (OD): NPS 1/8″ -30″ (10.3-762mm)
- Wall Thickness (WT): SCH 5S, 10S, 40S, 80S
ASTM B705 Welded UNS N06625 & N08825 Nickel Pipe
Golden Sunbird Metals supplies high-quality ASTM B705 welded alloy pipe in UNS N06625 and UNS N08825, designed for demanding service environments where corrosion resistance, strength, and long-term reliability are essential. Manufactured to meet stringent international standards, these nickel-based alloy pipes offer excellent performance in chemical processing, seawater systems, pollution control equipment, heat exchangers, offshore facilities, and other high-temperature or highly corrosive applications. UNS N06625, commonly known as Inconel 625, provides outstanding resistance to oxidation, pitting, and crevice corrosion, while UNS N08825, also known as Incoloy 825, delivers excellent resistance to acids and reducing media. As a trusted supplier of premium alloy piping products, Golden Sunbird Metals ensures consistent quality, stable dimensions, and dependable performance for global industrial projects. Whether your requirement is for critical process piping or specialized corrosion-resistant systems, our ASTM B705 welded alloy pipe solutions are engineered to meet the toughest operational challenges.
Chemical Composition (wt.%) of ASTM B705 Welded UNS N06625, N08825 Alloy Pipe
| Element | UNS N06625 Limits (%) | UNS N06219 Limits (%) | UNS N08825 Limits (%) |
| Ni | 58.0 min* | Bal | 38.0–46.0 |
| Cr | 20.0–23.0 | 18.0-22.0 | 19.5–23.5 |
| Fe | 5.0 max | 2.0-4.0 | 22.0 min* |
| Mo | 8.0–10.0 | 7.0-9.0 | 2.5-3.5 |
| Cb + Ta | 3.15–4.15 | – | – |
| C | 0.10 max | 0.05 max | 0.05 max |
| Mn | 0.50 max | 0.50 max | 1.0 max |
| Si | 0.5 max | 0.70-1.10 | 0.5 max |
| P | 0.015 max | 0.020 max | – |
| S | 0.015 max | 0.010 max | 0.03 max |
| Al | 0.4 max | 0.50 max | 0.2 max |
| Ti | 0.40 max | 0.50 max | 0.6–1.2 |
| Co | 1.0 max (if determined) | 1.0 max | – |
| Cu | – | 0.50 max | 1.5–3.0 |
Mechanical Properties of ASTM B705 Welded UNS N06625, N08825 Alloy Pipe
| Alloy | Grade | Tensile Strength min (psi / MPa) | Yield Strength 0.2% Offset min (psi / MPa) | Elongation in 2 in. or 50 mm min (%) |
| UNS N06625 | 1 (annealed) | 120,000 / 827 | 60,000 / 414 | 30 |
| UNS N06625 | 2 (solution annealed) | 100,000 / 690 | 40,000 / 276 | 30 |
| UNS N06219 | – | 96,000 / 660 | 39,000 / 270 | 30 |
| UNS N08825 | – | 85,000 / 586 | 35,000 / 240 | 30 |
Features
- Welded nickel-alloy pipe covered by ASTM B705 for general corrosion applications.
- Covers UNS N06625, UNS N06219, and UNS N08825 grades in the annealed condition.
- Excellent resistance to chloride-induced stress corrosion cracking, pitting, and crevice corrosion.
- Strong performance in oxidizing and reducing corrosive media, including aggressive chemical environments.
- Suitable for high-temperature service, sour gas exposure, seawater environments, and severe industrial process conditions.
Technical Specifications
| Specification | Value |
| Standard | ASTM B705 Nickel-Alloy (UNS N06625, N06219 and N08825) Welded Pipe |
| Grade | UNS N06625 (EN 2.4856, NiCr22Mo9Nb, Alloy 625), UNS N06219, UNS N08825 (EN 2.4858, Alloy 825) |
| Manufacturing Process | Automatic welding |
| Seam Type | Welded |
| Welded Pipe SPS Diameters | Outside Diameter (OD) Range: NPS 1/8″-30″ (10.3-762mm), Wall Thickness (WT) Range: SCH5, SCH10, SCH40, SCH80 (1.24-12.7mm) |
| Length | 6000-12000mm |
| Delivery Condition | UNS N06625 Grade 1 Annealed, Grade 2 Solution Annealed; UNS N06219, UNS N08825 |
| 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 (NDT), Intergranular corrosion test, Metallographic examination |
Applications
- Chemical processing piping, reactors, transfer lines, and corrosive media handling systems.
- Heat exchangers and process equipment exposed to acid, chloride, and mixed corrosive environments.
- Oil and gas production equipment, including sour service and harsh downhole conditions.
- Offshore, marine, and seawater applications, including desalination-related systems.
- Aerospace and high-temperature systems requiring oxidation and corrosion resistance.
- Petrochemical plants and other severe industrial service environments.
