High-Alloy Austenitic Stainless ASTM A312 / A358

SMO 254 Pipes .

SMO 254 Pipes are high-molybdenum austenitic stainless steel pipes (UNS S31254) engineered for outstanding resistance to pitting, crevice corrosion, and chloride-bearing media — ideal for aggressive chemical and seawater service.

Kronex Stainless India supplies SMO 254 Pipes with premium surface finish and compliance to major international material specifications.

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Chloride resistance

Exceptional resistance to pitting and crevice corrosion in chlorides and seawater.

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Corrosion performance

Outperforms conventional 316L in many aggressive process streams.

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Weldability

Suitable for welded fabrication with appropriate filler and procedures.

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Service life

Long service life in desalination, chemical, and offshore piping systems.

SMO 254 high-alloy stainless steel piping

Technical Spec View: SMO 254 UNS S31254

Technical Specifications

Parameter Specification Detail
Material Grade SMO 254 (UNS S31254)
Standard ASTM A312 / A358 / A249
Size 1/8" NB to 24" NB
Thickness SCH 10 to SCH XXS
Type Seamless / Welded

Chemical Composition (Basic)

Element Typical range
Chromium (Cr) ~19.5–20.5%
Nickel (Ni) ~17.5–18.5%
Molybdenum (Mo) ~6.0–6.5%
Nitrogen (N) ~0.18–0.22%

Applications

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