Seamless Stainless Steel 654SMO |UNS S32654|1.4652 Tube
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 Thickness | Length |
|---|---|---|
| 6.35 mm – 257 mm (1/4"– 10.1") | 0.5 mm – 12.7 mm | ≤ 22 m |
Chemical Composition
654SMO (UNS S32654) — Composition %
| UNS | C | Mn | P | S | Si | Cr | Ni | Mo | N | Cu |
|---|---|---|---|---|---|---|---|---|---|---|
| S32654 | ≤ 0.020 | 2.0 – 4.0 | ≤ 0.030 | ≤ 0.005 | ≤ 0.50 | 24.0 – 25.0 | 21.0 – 23.0 | 7.0 – 8.0 | 0.45 – 0.55 | 0.30 – 0.60 |
Mechanical Properties
| Property | Value |
|---|---|
| Delivery Condition | Solution annealed, pickled & polished |
| Tensile Strength | ≥ 750 MPa |
| Yield Strength (0.2% offset) | ≥ 430 MPa |
| Elongation in 2 in. / 50 mm | ≥ 35% |
Physical Properties
| Property | Value |
|---|---|
| Density | 8.3 g/cm3 |
| Thermal Conductivity | 12.0 W/m·K |
| Specific Heat Capacity | 480 J/kg·K |
| Elastic Modulus | 200 GPa |
| Magnetic Properties | Non-magnetic (slightly magnetic when cold worked) |
| PREN (Pitting Resistance Equivalent) | ≥ 53.0 |
Industry Applications
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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
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