About Uns S31254 Seamless Pipe Welded Pipe (254 SMO, 1.4547, 254SMO)

About UNS S31254 Seamless and Welded Pipes (254 SMO, 1.4547, 254SMO)

UNS S31254, also known as Alloy 6Mo, WNR 1.4547, F44, or 254SMO, is a high-performance super austenitic stainless steel designed for extreme corrosion resistance. It excels in harsh environments such as high-temperature seawater, acidic solutions, and chloride-rich conditions.

We provide a wide range of high-quality seamless and welded stainless steel pipes made from UNS S31254, commonly referred to as 254SMO or WNR 1.4547. These pipes are manufactured using premium materials and adhere to strict industry standards, making them ideal for use in desalination plants, chemical processing units, flue gas desulfurization systems, and other demanding applications.

Key features of UNS S31254 stainless steel pipes include:

  • Exceptional Corrosion Resistance: Formulated with high levels of molybdenum and nitrogen, these pipes offer superior resistance to pitting, crevice corrosion, and stress corrosion cracking, even in aggressive environments.
  • High Strength: The material’s advanced composition ensures excellent mechanical properties, making it suitable for high-pressure and high-temperature applications.
  • Good Weldability: S31254 is easy to weld and fabricate, allowing for flexibility in complex piping designs without compromising structural integrity.
  • Compliance with Industry Standards: Our S31254 pipes meet the requirements of ASTM A269, ASTM A312, and ASTM A213, ensuring consistent quality and performance across different industries.

The manufacturing process of S31254 pipes begins with melting high-purity raw materials in an electric arc furnace. The molten steel is then refined using an argon-oxygen decarburization (AOD) process to remove impurities like carbon and sulfur. After refining, the steel is cast into billets, which are then hot-rolled into tubes. This meticulous process ensures that each pipe meets the highest standards of quality and durability.

SMO 254 Seamless Pipe Specifications

Specifications ASTM A 409 / ASME SA 409, ASTM A 312 / ASME SA 312, ASTM A 358 / ASME SA 358
Dimensions Conforms to ASTM, ASME, and API standards
Size From 1/2” to 48”
Specialized in Large diameter sizes
Thickness 20 SWG, 18 SWG, 16 SWG, 14 SWG, 12 SWG, 10 SWG, Sch. 10, Sch. 40, Sch. 80, etc.
Type Seamless, ERW, Welded, Fabricated
Form Round, Hydraulic, etc.
Length Single random, double random, cut length
End Plain end, beveled end, threaded

Chemical Composition of SMO 254 Pipe

SMO 254 Ni C Mo Mn Si Fe Cu S P Cr
17.5 – 18.5 0.02 max 6 – 6.5 1 max 0.8 max – 0.5 – 1 0.01 max 0.03 max 19.5 – 20.5

Mechanical Properties of SMO 254 Pipe

Density Melting Point Yield Strength (0.2% Offset) Tensile Strength Elongation
8.0 g/cm³ 1320–1390°C 300 MPa 650 MPa 35%

Equivalent Grades for 254 SMO Pipe

Standard UNS Werkstoff NR. AFNOR EN JIS SIS GOST
SMO 254 S31254 1.4547 Z1 CNDU 20.18.06Az X1CrNiMoCuN20-18-7 – 2378 –

Saxon Parts

spare parts for sealer, parts for FISCHBEIN, parts for heat sealer

GUANGZHOU TUSEN MACHINERY & EQUIPMENT CO., LTD , https://www.gztusen.com

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