SDINTL.NET | Premium Nickel Alloys, Stainless Steel & Duplex Fittings & Flanges

About SDINTL.NET

SDINTL.NET is a leading professional supplier and exporter of high-performance alloy products based in China. With years of rich experience, we specialize in manufacturing and supplying a comprehensive range of non-ferrous and ferrous alloy materials including nickel-based alloys, stainless steels, duplex and super duplex stainless steels, and aluminum.

We are committed to delivering first-quality products on time, backed by excellent after-sales service and a mutual benefit philosophy. Our product line includes seamless and welded pipes, tubes, flanges, forged and butt-welded fittings, bars, rods, plates, and sheets.

8+

Years Experience

50+

Global Clients

Our Core Values

First Quality

We enforce strict quality control at every stage of production to ensure our products meet international standards and customer specifications.

On Time

Punctuality is our promise. We understand the importance of timely delivery in industrial operations and ensure on-schedule shipments globally.

Mutual Benefit

We build long-term partnerships based on trust, transparency, and shared success with our clients and suppliers.

Our Products

High-performance alloy components engineered for extreme environments in oil & gas, chemical processing, power generation, marine, and petrochemical industries.

Weldolet

Butt-weld branch outlet fitting for high-pressure piping systems. Available in carbon steel, stainless steel, and alloy materials.

Sweepolet

Reinforced branch connection with smooth flow transition. Ideal for high-stress and high-cycle applications.

Alloy 625 Fitting

Ni-Cr-Mo-Cb Inconel alloy UNS N06625. Excellent resistance to pitting, crevice corrosion, and oxidation.

Flange Olet

Flanged branch connection for easy maintenance and inspection. Available in various pressure ratings.

Rotor Pump Flange

Specialized flange for rotor pump systems. Precision-engineered for leak-free performance.

🔧

Threaded Rods

High-strength threaded rods in alloy steel, stainless steel, and nickel alloys. Custom lengths and threads available.

🔩

Tube Sheets

Nickel base alloy and stainless steel tube sheets for heat exchangers and pressure vessels. Precision drilled and finished.

⚙️

Custom Flanges

Non-standard, large diameter, and special-shaped flanges manufactured to customer drawings and specifications.

🛡️

Super Duplex Fittings

S32750/F53 and S32760/F55 fittings for highly corrosive environments. Superior strength and chloride resistance.

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Seamless Pipes

Stainless steel and alloy seamless pipes for critical fluid transport. Available in various diameters and wall thicknesses.

⚡

Hastelloy C-276 Fittings

Ni-Cr-Mo UNS N10276. Exceptional resistance to oxidizing and reducing environments, pitting, and stress corrosion cracking.

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Inconel 600 Components

Ni-Cr-Fe Inconel 600 alloy UNS N06600. High strength and excellent resistance to oxidation and corrosion at elevated temperatures.

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Premium Materials

We work with the most advanced alloy compositions to meet the toughest industrial challenges.

Nickel-Based Alloys

• Inconel 600, 601, 617, 625, 686, 690, 693, X750
• Hastelloy B-2, B-3, C-22, C-276, C-4, G-30, G-35
• Monel 400 (N04400)
• Alloy 20 / Carpenter 20 (N08020)
• Incoloy 800H / 825 / 28 / 20Mo-6
• Haynes 556, Alloy X (N06002)

Stainless & Duplex Steels

• Super Austenitic 904L (N08904)
• Duplex S31803/F51, S32205
• Super Duplex S32750/F53, S32760/F55
• TP316L, TP304L, TP321, TP347H
• Aluminum Alloys
• Custom Specialty Alloys

Quality Control

Every product undergoes rigorous testing including chemical analysis, mechanical testing, hydrostatic testing, NDT (UT, PT, MT, RT), and dimensional inspection to ensure compliance with ASTM, ASME, API, and other international standards.

Frequently Asked Questions

What materials do you specialize in?

We specialize in nickel-based alloys (Inconel, Hastelloy, Monel), stainless steels (austenitic, duplex, super duplex), alloy steels, and aluminum. Our expertise includes high-performance alloys like 625, C-276, 825, and 254SMO.

Do you provide custom manufacturing?

Yes, we offer full custom manufacturing services. We can produce non-standard flanges, fittings, and components according to customer drawings, specifications, and international standards.

What certifications do your products have?

Our products are manufactured under strict quality control systems and can be supplied with MTRs (Material Test Reports), NACE compliance, and certifications including ISO, ASME, ASTM, and API standards.

What is your typical lead time?

Standard products are typically shipped within 2-4 weeks. Custom orders vary depending on complexity but we always provide clear timelines and updates throughout production.

How do you ensure product quality?

We implement comprehensive quality control including raw material verification, in-process inspections, final product testing (mechanical, chemical, NDT), and full documentation traceability for every batch.

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Premium Industrial
Alloy Solutions

About SDINTL.NET

8+

50+