ASTM A789 UNS S31803 Seamless Tube 2" Precision Tube Fast Delivery

SMLSCO, established in 2006, is a specialized inventory service provider and solutions provider for stainless steel piping systems. We focus on inventory services, maintaining over 3,000 tons of stock to meet your rapid delivery needs. Below are the core technical specifications for this product. For special specifications, please contact us via email or online inquiry.

S31803 is an exceptional duplex stainless steel combining the performance advantages of austenitic and ferritic steels. Its yield strength is nearly double that of traditional austenitic stainless steels . S31803 exhibits exceptional resistance to chloride stress corrosion cracking, pitting, and crevice corrosion. It is an ideal choice for highly corrosive environments.

S31803 duplex stainless steel precision tubing offers high strength and outstanding corrosion resistance. It is widely used in fluid conveyance systems for offshore oil and gas platforms, heat exchangers and pressure vessels in chemical processing plants, and seawater desalination equipment. In these high-pressure, high-temperature environments with highly corrosive media, SMLSCO's S31803 seamless tubes ensure long-term stability and safety for pipeline systems.

SMLSCO understands distributors' and stockists' core needs for efficiency and reliability. We offer the following advantages to streamline your procurement process and enhance cost-effectiveness:

Massive Inventory: SMLSCO maintain over 200 tons of S31803 seamless tube in stock. We cover the full range of standard sizes from 1/4“ to 2", enabling rapid fulfillment of your orders.

2-Week On-Time Delivery: we commit to preparing and delivering standard stock items within 2 weeks, significantly shortening your project timelines.

Authoritative Certifications: All pipes supplied by SMLSCO are PED/ISO/AD2000 certified. We guarantee compliance with international quality standards.

Full Traceability: We provide comprehensive quality traceability documentation from raw materials to finished products, including Material Test Certificates (MTC) and 100% pre-shipment inspection reports.

SMLSCO prioritizes quality above all. We have established a rigorous three-tier inspection system to ensure product compliance. The first step involves sourcing only high-quality raw materials from certified suppliers like TSINGSHAN. The second step entails conducting dimensional and performance inspections at critical production stages. The third step involves 100% pre-shipment inspection covering dimensions and surface finish, with 100% eddy current testing for precision tubes. All inspections are meticulously documented and support third-party verification.

Q1: What is the difference between S31803 and S32205?

A1: S32205 is an improved version of S31803, and the two grades are interchangeable in most applications. S32205 imposes stricter minimum requirements for nitrogen (N) and molybdenum (Mo) content, delivering more stable and superior corrosion resistance. SMLSCO's stock products typically meet the standards for both grades (S31803/S32205).

Q2: Are SMLSCO's precision tubes processed using the bright annealing (BA) method?

A2: Yes. All ASTM A789 precision seamless tubes supplied by SMLSCO undergo bright annealing treatment. This ensures smooth inner and outer surfaces with no oxide scale residue. It is highly suitable for instrumentation systems or fluid conveyance requiring high cleanliness standards.

Q3: How does SMLSCO guarantee fast delivery for S31803 pipes?

A3: We maintain substantial inventory of S31803 raw materials and semi-finished products in our warehouse, covering major dimensions. Upon order confirmation, we directly allocate stock from inventory and initiate rapid inspection and packaging. We ensure all processes are completed within 14 days for on-time shipment. SMLSCO truly delivers “Steel in Stock. Delivered on the Dot."