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Seamless Stainless steel 654SMO tube

Seamless Stainless Steel 654SMO |UNS S32654|1.4652 Tube

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654SMO (UNS S32654) Seamless Stainless Steel Tube Manufacturer & Supplier in China
Tengqi is a premier manufacturer and global supplier of 654SMO (UNS S32654) seamless stainless steel tubes, specializing in ultra-high-performance piping solutions for the world’s most aggressive environments.
Tengqi,Super-Austenitic Stainless Steel specialist based in Fujian, China, we produce 654SMO tubing engineered to withstand extreme chloride concentrations and high-stress conditions. With a Pitting Resistance Equivalent Number (PREN ≥ 56), our seamless 654SMO tubes outperform standard duplex steels and offer a high-strength, cost-effective alternative to expensive nickel-base alloys.
Technical Superiority of 654SMO (UNS S32654)
654SMO is a 7% Molybdenum super-austenitic grade designed for maximum reliability. Key performance benefits include:
Extreme Corrosion Resistance: Exceptional immunity to pitting and crevice corrosion in hot seawater and acidic halide media.
High Mechanical Strength: Significantly higher yield strength than standard 300-series or 904L stainless steels.
Chloride Stability: Superior resistance to Stress Corrosion Cracking (SCC) in high-chloride industrial processes.
Cost Efficiency: Provides "Nickel-Alloy level" performance at a more stable price point for large-scale infrastructure.
Technical Specifications & Manufacturing Range
We provide precision-engineered seamless tubing manufactured to international standards (ASTM A213, ASTM A269, EN 10216-5).

Seamless Stainless steel 654SMO tube (654SMO / UNS S32654 / W.Nr. 1.4652) is the highest-alloyed super-austenitic grade with a PREN above 53 for the most severe chloride service. Manufactured by Tengqi in Fujian, China, every heat is fully traceable, hydro-tested and available with third-party inspection (SGS / BV / TUV) on request.

Product Specifications

  • ASTM A213 / ASME SA213 — Seamless
  • ASTM A269 / A269M — Seamless & Welded
  • ASTM A270 / A270M — Sanitary Tubing
  • ASTM A1016 / A1016M — General Requirements
  • EN 10216-5 — Seamless Pressure Tubing
  • Finishing: solution annealed, pickled & polished; bright annealed available on request

Size Range

Outside Diameter (OD)Wall ThicknessLength
6.35 mm – 257 mm (1/4"– 10.1")0.5 mm – 12.7 mm≤ 22 m

Chemical Composition

654SMO (UNS S32654) — Composition %

UNSCMnPSSiCrNiMoNCu
S32654≤ 0.0202.0 – 4.0≤ 0.030≤ 0.005≤ 0.5024.0 – 25.021.0 – 23.07.0 – 8.00.45 – 0.550.30 – 0.60

Mechanical Properties

PropertyValue
Delivery ConditionSolution annealed, pickled & polished
Tensile Strength≥ 750 MPa
Yield Strength (0.2% offset)≥ 430 MPa
Elongation in 2 in. / 50 mm≥ 35%

Physical Properties

PropertyValue
Density8.3 g/cm3
Thermal Conductivity12.0 W/m·K
Specific Heat Capacity480 J/kg·K
Elastic Modulus200 GPa
Magnetic PropertiesNon-magnetic (slightly magnetic when cold worked)
PREN (Pitting Resistance Equivalent)≥ 53.0

Industry Applications

Seawater Desalination
Marine & Offshore Engineering
Oil & Gas, Sour Service
Sulfuric & Phosphoric Acid Service
Chemical & Petrochemical Industry
Heat Exchangers & Boiler Tubes
Flue Gas Desulfurization
Pulp & Paper Industry

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CONTACT US

Lidun Industrial Park, Lidun Town, Zhouning County, Ningde City, Fujian Province,355400,China

+86-577-88877003
+86-577-88877015
+86-577-88877019

+86 13587686960

info@xtd-ss.com
sales@xtd-ss.com

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Lidun Industrial Park, Lidun Town, Zhouning County, Ningde City, Fujian Province,355400,China

+86-577-88877003
+86-577-88877015
+86-577-88877019

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