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United Kingdom

Stainless steel tubes

Alloy 6Mo • UNS S31254 • WNR 1.4547


6 Mo (UNS S31254) is a super austenitic stainless steel with a high level of molybdenum and nitrogen, providing high resistance to pitting and crevice corrosion as well as high strength compared with conventional austenitic stainless steels such as 316L. The alloy can provide excellent resistance to stress corrosion cracking allowing tube cold formingand may be used without the necessity to re-anneal at testing up to 120°C. Available tube product forms Straight Coiled Seamless Seam welded and cold redrawn Seam welded, cold redrawn and annealed Typical Applications Seawater handling systems Desalination plant equipment Paper and pulp Flue gas desulphurisation units in power plants Chemical processing Control and instrumentation tubes Typical manufacturing specifications ASTM A213 ASTM A269 ASTM A312 BS EN 10216 pt.5 Also individual customer specifications. Industries predominantly using this grade Chemical processes Oil and gas

Product features

Tensile Rm 675 MPa (min)
R.p. 0.2% Yield 45 ksi (min)
R.p. 0.2% Yield 310 MPa (min)
Elongation (2" or 4D gl) 35 % (min)
Thermal Conductivity 14 W.m -1.°K-1
Thermal Expansion 16.5 mm/m/°C
Modulus Elasticity 196 GPa
Electrical Resistivity 8.5 μohm/cm
Density 8.0 g/cm3

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