ALLOY 6Mo • UNS S31254 • WNR 1.4547

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...
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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.

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.


Typical Chemical Composition (% by weight)

TitleUNSWerkstoffCSiMnPSCrNiMoCuN

316L

S31603

1.4404

0.03

1

2

0.045

0.015

17.5

11.5

2.25

-

-

317L

S31703

1.4439

0.03

1

2

0.045

0.3

19

13

3.5

-

-

904L

N08904

1.4539

0.02

1

2

0.045

0.035

21

25.5

-

-

-

6Mo

S31254

1.4547

<0.02

0.7

1

0.03

0.01

20

18

6.1

0.75

0.2

625

N06625

2.4856

0.1

0.5

0.5

0.015

0.5

21.5

58

8.5

-

-

C276

N10276

2.4819

0.01

0.08

1

0.04

0.03

15.5

55

16

Co
2.5

W
3.75


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

TemperAnnealed
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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