We are a professional nickel alloy seamless tube manufacturer and supplier in China, serving global precision parts buyers, EPC contractors, and equipment fabricators. Our product range covers the full spectrum of corrosion-resistant and high-temperature nickel alloys — from standard 304L/316L stainless to advanced Inconel 625, Inconel 825, Hastelloy C276, and Monel 400 — with EN 10204 3.1 material certificates and full traceability on every order.
We supply seamless tubes in the following nickel alloy grades:
| Alloy Grade | UNS | Standard | OD Range | WT Range | Primary Application |
|---|---|---|---|---|---|
| 304L Stainless | S30403 | ASTM A213 | 6–168mm | 0.5–14mm | General corrosion, low temp |
| 316L Stainless | S31603 | ASTM A213 | 6–168mm | 0.5–14mm | Chloride, marine |
| 904L | N08904 | ASTM A213 | 6–114mm | 1–12mm | Phosphoric acid, seawater |
| Inconel 625 | N06625 | ASTM B444 Gr.1/2 | 6–168mm | 1–14mm | High temp, offshore, aerospace |
| Inconel 825 | N08825 | ASTM B423 | 6–168mm | 1–12mm | Sulfuric acid,pickling tanks |
| Hastelloy C276 | N10276 | ASTM B622 | 6–168mm | 1–14mm | Strong acids, mixed chemicals |
| Hastelloy B3 | N10675 | ASTM B622 | 6–114mm | 1–10mm | HCl all concentrations, temps |
| Monel 400 | N04400 | ASTM B165 | 6–114mm | 1–10mm | Seawater, HF acid |
| Alloy 800/800H/HT | N08800/08810/08811 | ASTM B163/B407 | 6–168mm | 1–14mm | High temp (to 1100°C) |
| Alloy 254 SM | S31254 | ASTM A213 | 6–114mm | 1–10mm | Chloride, seawater, hypoxia |
Every nickel alloy seamless tube we supply goes through rigorous quality control stages:
Prices vary significantly by alloy grade and specification. As a general guide (USD/kg, FOB Shanghai, 2026): 316L stainless: $8–18/kg; 904L: $22–40/kg; Inconel 625: $65–120/kg; Hastelloy C276: $80–140/kg; Monel 400: $45–85/kg. Prices depend on order quantity, mill, and specifications. Send your OD, WT, grade, and quantity for a firm quotation.
Seamless tubes are made from a solid billet that is pierced and drawn over a mandrel — no longitudinal weld seam exists. Welded tubes (EW or LW) are made from strip/plate that is rolled and welded along the axis. Seamless tubes offer superior pressure rating, better corrosion resistance (no weld HAZ), and are preferred for high-pressure, high-temperature, or sour service (NACE). Welded tubes are more cost-effective for moderate-pressure applications. For pump shafts, pressure vessels, or sour gas, seamless is mandatory.
Yes. Standard finish is pickled and passivated. We also supply: bright annealed (BA) with Ra ≤ 0.8μm ID, electropolished (EP) tubes for semiconductor and pharma use (Ra ≤ 0.25μm), and mirror-polished OD for decorative or instrumentation applications. Electropolished tubes undergo multi-stage chemical polishing for the lowest possible surface roughness and maximum corrosion resistance.
Yes. We supply heat batches that are qualified per NACE MR0175 / ISO 15156-3 for use in H₂S-containing oil and gas production environments. HYSY (maximum allowable H₂S partial pressure) and pH limits are documented on the material datasheet. Please specify sour service requirements when requesting a quote so we can select the appropriate heat batch.
Common sizes (316L/904L, OD 25–76mm, WT 2–5mm) from stock: 5–10 working days. Non-stock Inconel/Hastelloy grades: 15–30 working days for mill production. Full container (≈ 5–8 MT) sea freight: 25–40 days to major world ports. We maintain safety stock of 316L, 904L, Inconel 625, and Hastelloy C276 for fast-track orders.