Super Austenitic 654SMO Stainless Steel Round Bar with High Nickel Content and Corrosion Resistance
UNS S32652 / 654SMO Super Austenitic Stainless Steel
Standards: 1.4652 / X1CrNiMoCuN24-22-8
Compliant with ASTM A312, ASTM A269 for seamless and welded austenitic stainless steel pipe and tube applications.
654SMO (S32654, 1.4652) is a super austenitic stainless steel containing 23% nickel, 25% chromium, and 7% molybdenum, offering significantly superior corrosion resistance compared to standard austenitic steels. This advanced material serves as a cost-effective alternative to nickel-based alloys and titanium alloys.
Due to its high molybdenum content, 654SMO presents challenges in seamless pipe perforation with risks of eccentricity or cracking. Our specialized center perforation process followed by cold rolling or cold drawing ensures high success rates and dimensional accuracy.
- Exceptional pitting and crevice corrosion resistance in harsh environments
- Superior mechanical properties with high yield strength
- Excellent processability and formability
- Outperforms 904L and 254SMO in high temperature and corrosion resistance
- Proven performance in seawater, aeration, gaps, and low-speed erosion conditions
| Element | Composition (%) |
|---|---|
| C | ≤0.02 |
| Si | ≤0.05 |
| Mn | 2.00-4.00 |
| Ni | 21.0-23.0 |
| P | ≤0.03 |
| S | ≤0.005 |
| Cr | 23-25 |
| Mo | 7.0-8.0 |
| N | 0.45-0.55 |
| Cu | 0.3-0.6 |
Size Range for Tubing:
Outer Diameter: 1/4" (6.25mm) to 8" (203mm)
Wall Thickness: 0.02" (0.5mm) to 0.5" (12mm)
Length: Up to 15m maximum or as required
Manufacturing Processes:
Seamless: Cold drawn, Cold rolled, Precision rolled
Welded: Gas tungsten arc welding, Plasma arc welding (PAW), Submerged arc welding (SAW)
Surface Finish:
Annealed & pickled, Bright annealing, Polished
End Preparation:
Beveled or plain end, Square cut, Burr free, Plastic cap protection
Packaging Options:
Bare packing, Bundle packing with woven bag, Wooden or steel frame crate packing, Sea-worthy delivery protection
- 100% PMI and Spectro Chemical Analysis for raw material verification
- 100% dimensional and visual examination
- Comprehensive mechanical properties testing including tension, flaring, flange, hardness, and reversed flattening tests
- 100% hydrostatic testing or non-destructive testing (ET or UT)
- Radiographic testing for welded pipes
- Optional testing: Straightness, Roughness, Intergranular corrosion, Impact, Grain size determinations
All test and inspection results are documented in comprehensive reports compliant with applicable standards and specifications.
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