ASTM A312 904L Seamless Stainless Steel Tubes | High Molybdenum-Nickel for Severe Corrosion Environments

Product Details: ASTM A312 Seamless Stainless Steel Tubes (TP317L/TP310S/TP309S/TP347H/TP904L/N08904)

Manufacturer & Supplier: [Wuxi Weiman Gaodeng Special Steel Co., Ltd]Premium Quality, Custom Sizes, Global Delivery

1. Product Overview

We specialize in manufacturing ASTM A312 seamless stainless steel tubes in high-performance grades: TP317L, TP310S, TP309S, TP347H, TP904L, and N08904. These tubes are engineered for extreme environments, offering superior resistance to corrosion, high temperatures, and harsh chemical media. Ideal for critical applications in chemical processing, power generation, heat treatment, and offshore industries.

2. Material Grades & Key Features2.1 TP317L (UNS S31726)

? Chemistry: High Mo (3.0-4.0%) and low carbon, enhancing resistance to pitting/crevice corrosion in chloride environments.

? Mechanical Properties: Yield Strength ≥ 205 MPa, Tensile Strength ≥ 520 MPa, Elongation ≥ 40%.

? Advantages: Better corrosion resistance than 316L; suitable for seawater, pulp/paper, and chemical tanks.

? Applications: Desalination plants, pharmaceutical equipment, offshore pipelines.

2.2 TP310S (UNS S31008)

? Chemistry: High Cr (24-26%) and Ni (19-22%), enabling oxidation resistance up to 1200°C.

? Mechanical Properties: Yield Strength ≥ 205 MPa, Tensile Strength ≥ 520 MPa, Service Temperature -196°C to 1200°C.

? Advantages: Excellent high-temperature strength and carburization resistance.

? Applications: Furnace tubes, heat exchangers in thermal processing, kiln components.

2.3 TP309S (UNS S30908)

? Chemistry: Balanced Cr (22-24%) and Ni (12-15%), optimized for mid-to-high-temperature oxidation resistance.

? Mechanical Properties: Yield Strength ≥ 205 MPa, Tensile Strength ≥ 515 MPa, Good weldability.

? Advantages: Resistant to moderate-temperature carburization and intergranular corrosion.

? Applications: Industrial furnaces, waste incinerators, heat treatment fixtures.

2.4 TP347H (UNS S34709)

? Chemistry: Nb-stabilized (≥10×C), preventing carbide precipitation and enhancing creep resistance at 500-800°C.

? Mechanical Properties: Yield Strength ≥ 205 MPa, Tensile Strength ≥ 515 MPa, High-temperature durability.

? Advantages: Superior intergranular corrosion resistance and long-term creep rupture strength.

? Applications: Power plant boiler tubes, superheaters, petrochemical reactors.

2.5 TP904L (UNS N08904)

? Chemistry: High Ni (23-25%), Mo (4-5%), and Cu (1-2%), designed for severe acid corrosion.

? Mechanical Properties: Yield Strength ≥ 220 MPa, Tensile Strength ≥ 520 MPa, Excellent ductility.

? Advantages: Resistant to sulfuric/phosphoric acids, chloride stress corrosion, and high-temperature oxidation.

? Applications: Chemical reactors, pickling tanks, offshore oil & gas equipment.

2.6 N08904 (Equivalent to TP904L, UNS N08904)

? Chemistry: Identical to TP904L, compliant with international standards (ASTM B677, EN 1.4539).

? Mechanical Properties: Same as TP904L, with strict control of trace elements for global compliance.

? Advantages: Multinational specification compatibility for cross-border projects.

? Applications: International chemical plants, marine engineering, and harsh industrial environments.

3. Standards Compliance

? Material Standards: ASTM A312, ASTM A213, ASME SA312, ASME SA213, EN 10216-5 (on request).

? Testing: PMI, UT/RT, mechanical testing, corrosion testing (as per customer requirements).

? Certifications: ISO 9001, PED 2014/68/EU, CE, NACE MR0175 (optional).

4. Specifications

? Dimensions:

? Outer Diameter (OD): 6mm-610mm (1/4"-24")

? Wall Thickness: 0.5mm-50mm (0.02"-2")

? Length: 1m-12m (customizable, including random)

? Form: Seamless (cold-drawn/hot-rolled), Annealed & Pickled (AP), Bright Annealed (BA).

? Surface Treatment: Polished (Ra≤0.8μm), Anti-rust oil coating, or according to project needs.

5. Product Advantages

? Direct from Manufacturer: Eliminate middlemen for competitive pricing and fast lead times.? Customization: Tailored dimensions, end finishes (beveled, plain), and special packaging.? Quality Assurance: 100% non-destructive testing (NDT) and mill certification provided with each batch.? Global Logistics: Export-ready packaging (wooden crates, seaworthy bundles), delivery to ports worldwide.

6. Packaging & Delivery

? Packaging: Protective plastic film + steel strapping + wooden pallets/crates (anti-rust and shock-resistant).

? Lead Time: 15-30 days for standard sizes; 45-60 days for custom orders.

? Payment Terms: T/T, L/C at sight, DP (negotiable for long-term clients).

7. Applications

? Industries: Chemical Processing, Power Generation, Oil & Gas, Marine Engineering, Heat Treatment, Pharmaceuticals.

? Typical Use Cases: Heat exchangers, boiler tubes, reactor pipelines, furnace components, corrosive fluid transport.

8. Why Choose Us?

? 15+ Years Experience: Specialized in high-alloy stainless steel and nickel-based alloys.

? Technical Support: Free material selection guidance and engineering drawings review.

? Stock Availability: Extensive inventory of rare grades (TP904L/N08904) for urgent orders.

1. Technical Clarity: Clear breakdown of chemistry, mechanical properties, and standards to build trust with engineers/ purchasers.

2. Problem-Solving: Highlight how each grade solves specific challenges (e.g., “Nb-stabilized for boiler tube creep resistance”).

3. Global Appeal: Use UNS numbers, dual units (mm/inch), and international certifications to cater to multi-region buyers.

4. CTA Focus: Prominent contact information and value-added services (customization, technical support) to drive inquiries.