1. Standard grade: Alloy 28 / UNS N08028 / W.Nr 1.4563, also named Sanicro 28 / 27-31-4 super austenitic nickel alloy seamless pipe
2. Manufactured fully compliant with global standards: ASTM A312, ASTM B688, API 5CRA, API6A, EN10216 and related nickel alloy pipe specifications
3. Ultra-high Cr-Ni-Mo composite formula delivers top-tier resistance to mixed acid, chloride brine, pitting, crevice and stress corrosion cracking
4. Available in hot-worked, cold-worked & forged states; full size coverage: OD 1/8"-48", wall thickness SCH5 to XXS, customizable round/square/rectangular/perforated shapes
5. Multiple surface finishes optional: Pickling, Polishing, BA, HL, No.4 bright finish to meet hygiene & anti-corrosion demands
6. Excellent machinability & weldability, supports custom cutting, slotting, drilling, perforation and flange welding per customer drawings
7. Stable mechanical performance after annealing, long service life with low maintenance in extreme corrosive industrial environments

This series Alloy 28 (N08028 / 1.4563 / Sanicro 28) seamless pipe is a premium super austenitic nickel-iron-chromium-molybdenum alloy tubular product. Produced via hot extrusion and cold drawing processes, it eliminates welding seams to achieve outstanding pressure bearing capacity and structural integrity.

With unique 26–28% Chromium, 30–34% Nickel and 3–4% Molybdenum chemical design, the pipe balances strong resistance to both oxidizing and reducing corrosive media. It outperforms regular 304 & 316L stainless steel under harsh working conditions including concentrated sulfuric/phosphoric acid, sour gas, seawater and industrial mixed corrosive fluids.

We supply full-size specifications covering small precision capillary tubes to large industrial pipeline pipes. Product forms include solid seamless round tube, square/rectangular hollow sections, perforated pipes and forged tubular blanks. Custom length (5m–14m, fixed 5.8m/6m/12m or random length) and tailor-made machining services are available for all engineering projects.

• Super high-alloy austenitic nickel-based corrosion resistant seamless pipe material
• High Cr, Ni & Mo content provides dual protection against oxidizing and reducing acids
• Excellent resistance to pitting corrosion, crevice corrosion and chloride-induced stress corrosion cracking
• Stable mechanical properties after annealing; balanced tensile strength, yield strength and cold elongation
• Good weldability without post-weld intergranular corrosion risk
• Ideal for heavy-duty severe corrosion environments where standard stainless steel fails
• Applicable for high-pressure pipeline, heat exchanger, evaporator and downhole OCTG tubing

We provide seamless pipe, welded pipe and tubular fittings in full range stainless steel, nickel alloy, duplex steel, alloy steel and carbon steel for diversified corrosive & high-temperature working conditions:

1. Austenitic Stainless Steel: 304, 316L, 310S, 321, 347, 904L, 254SMo, 253Ma, XM-19, N08020, Alloy 28
2. Duplex Stainless Steel: 2205, 2507, S32750, S32760, F51, F55, F60
3. Special Nickel Corrosion Resistant Alloys
   • Pure Nickel & Duranickel: Nickel 200, 201, Duranickel 301
   • Monel Series: Monel 400, K-500
   • Inconel Series: 600, 625, 718, 686, 690, X-750, HX
   • Hastelloy Series: C22, C276, C2000, G35, B2, B3, X
   • Incoloy Series: 800, 800H, 800HT, 825, 925, G-3, 020
   • Nimonic Series: 75, 80A, 90, 105, 263
4. Heat Resistant Alloys: A-286, 330, 740, 783
5. Alloy Steel: 4140, 4340, 4130, P11, P22, P91, P92
6. Carbon Steel: A105, A516 Gr.70, A36, S235JR, P235GH, P355GH

High chromium, nickel and molybdenum composition resists concentrated sulfuric acid, phosphoric acid, brine, sour gas and mixed oxidizing/reducing media; effectively avoids pitting, crevice corrosion and stress cracking.

No welding seam eliminates leakage risk; hot/cold forming technology ensures uniform internal metallographic structure, stable performance under high pressure and temperature working conditions.

Balanced alloy proportion minimizes intergranular corrosion after welding, compatible with conventional welding processes; supports bending, cutting, drilling and complex customized forming.

Pickling, BA, HL, No.4 polished finishes deliver smooth, dense surfaces, easy to clean, suitable for pharmaceutical, food and high-purity chemical fluid delivery pipelines.

Full OD, wall thickness and length options; support round, square, rectangular, perforated tubular products, flange welding and drawing-based custom machining.

Stable mechanical strength and outstanding anti-corrosion performance greatly reduce replacement frequency and later maintenance cost for long-cycle industrial operation.

• Chemical processing: Phosphoric/sulfuric acid evaporators, heat exchangers, reactor fluid pipelines
• Oil & gas industry: Sour gas well OCTG tubing, casing and offshore subsea pipelines
• Marine & desalination: Seawater transportation pipes, brine recycling equipment
• Pollution control & flue gas treatment: Waste acid recovery pipeline, desulfurization heat exchange tubes
• Pickling workshop & fertilizer production plant high-corrosion pipeline systems
• Pharmaceutical & high hygiene fluid conveying equipment
• Waste heat boiler, biomass furnace high-temperature corrosion resistant tubes
• Pulp & paper black liquor recovery pipeline and heat exchangers

We provide integrated forging and precision machining services, and can produce finished components strictly according to customer drawings:

Turning, milling, planing, drilling, boring, grinding

Gear cutting, CNC precision machining

Sizing cutting, surface treatment and finishing

We have supplied a wide range of forged and machined parts including shafts, cylinders, hollow bars, pistons, tube sheets, rings and disc bearings to customers worldwide.

We have a professional QC inspection team and complete testing equipment to ensure stable and reliable product quality:

Ultrasonic testing (UT) for internal defects

Tensile and hardness testing for mechanical properties

High-precision dimensional measurement

Spectrometer for chemical composition verification

Metallographic microstructure inspection

Every batch of products undergoes strict inspection before delivery to meet the quality requirements of various engineering projects.

Inner packaging: waterproof polybag for moisture and dust protection

Outer packaging: reinforced wooden case / wooden pallet, suitable for long-distance international transportation

Custom packaging solutions available upon request

Normally 10 – 45 days after receipt of advance payment

Exact delivery time depends on order quantity, specification complexity and machining requirements