ALLOY 6Mo • UNS S31254 • WNR 1.4547

 

※ 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 forming and may be used without the necessity to re-anneal at testing up to 120°C.

 

Available Tube Product form

· Straight

· 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

 

Industries predominantly using this Grade

· Chemical processes

· Oil and gas

 

Typical Manufacturing Specifications

· ASTM A213

· ASTM A269

· ASTM A312

· BS EN 10216 pt.5

· Also individual customer specifications.

 

Technical Data

Typical Chemical Composition (% by weight)

Physical Properties (Room Temperature)

Specific Heat (0-100°C)	500	J.kg-1.°K-1
Thermal Conductivity	14	W.m -1.°K-1
Thermal Expansion	16.5	μm/μm/°C
Modulus Elasticity	196	GPa
Electrical Resistivity	8.5	μohm/cm
Density	8.0	g/cm3

 

Mechanical Properties

Temper	Annealed
Tensile Rm	98	ksi (min)
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)

 

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