EN 1.4547, ASTM UNS S31254 Stainless Steel

EN 1.4547, ASTM UNS S31254 Stainless Steel

EN 1.4547, ASTM UNS S31254 Stainless Steel General Characteristics EN 1.4547 is a 6% molybdenum and nitrogen-alloyed austenitic stainless steel with extremely high resistance to both uniform and localized corrosion. This product was developed especially for oil and gas offshore platforms and the...
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EN 1.4547, ASTM UNS S31254 Stainless Steel

General Characteristics

EN 1.4547 is a 6% molybdenum and nitrogen-alloyed austenitic stainless steel with extremely high resistance to both uniform and localized corrosion. This product was developed especially for oil and gas offshore platforms and the pulp and paper industry.


Typical Applications

  • Applications requiring resistance to chlorinated seawater

  • Flue gas cleaning

  • Maritime exhaust gas cleaning (EGC)

  • Bleaching equipment in the pulp and paper industry

  • Flanges and valves


Chemical Composition

The typical chemical composition for this grade is given in the table below, together with composition limits given for the product according to different standards. The required standard will be fully met as specified on the order.

The chemical composition is given as % by mass.



CMnCrNiMoNOther

Typical

0.01


20.0

18.0

6.1

0.20

Cu:0.7

ASME II A SA-240

≤0.020

≤1.00

19.50-20.50

17.50-18.50

6.00-6.50

0.18-0.25

Cu:0.50-1.00

ASTM A240

≤0.020

≤1.00

19.5-20.5

17.5-18.5

6.0-6.5

0.18-0.25

Cu:0.50-1.00

EN 10028-7

≤0.020

≤1.00

19.5-20.5

17.5-18.5

6.0-7.0

0.18-0.25

Cu:0.50-1.00

EN 10088-2

≤0.020

≤1.0

19.5-20.5

17.5-18.5

6.0-7.0

0.18-0.25

Cu:0.5-1.0

EN 10088-3

≤0.020

≤1.00

19.5-20.5

17.5-18.5

6.0-7.0

0.18-0.25

Cu:0.50-1.00

EN 10088-4

≤0.020

≤1.0

19.5-20.5

17.5-18.5

6.0-7.0

0.18-0.25

Cu:0.5-1.0

IS 6911

≤0.020

≤1.00

19.5-20.5

17.5-18.5

6.0-6.5

0.18-0.25

Cu:0.50-1.00


Mechanical Properties

The addition of nitrogen to EN 1.4547 gives higher proof strength and tensile strength. Despite the greater strength, the possibilities for cold as well as hot forming are very good.


Mechanical properties at room temperature are shown in the table below.


StandardRp0.2Rp1.0RmElongationRockwellHB

MPa

MPa

MPa

%



Product type: Cold rolled coil and sheet

Typical (thickness 1 mm)

375

415

735

60



ASME II A SA-240

≥ 310


≥ 655



≤ 223

ASTM A240

≥ 310


≥ 655


≤ 96HRB

≤ 223

EN 10028-7

≥ 320

≥ 350

650-850

≥ 35



EN 10088-2

≥ 320

≥ 350

650-850

≥ 35



EN 10088-4

≥ 320

≥ 350

650-850

≥ 35



IS 6911

≥ 310


≥ 690


≤ 96HRB

≤ 223

Product type: Hot rolled coil and sheet

Typical (thickness 4 mm)







ASME II A SA-240

≥ 310


≥ 655



≤ 223

ASTM A240

≥ 310


≥ 655



≤ 223

EN 10028-7

≥ 320

≥ 350

650-850

≥ 35



EN 10088-2

≥ 320

≥ 350

650-850

≥ 35



EN 10088-4

≥ 320

≥ 350

650-850

≥ 35



IS 6911

≥ 310


≥ 690


≤ 96HRB

≤ 223

Product type: Hot rolled quarto plate

Typical (thickness 15 mm)

320

350

680

50


160

ASME II A SA-240

≥ 310


≥ 655


≤ 96HRB

≤ 223

ASTM A240

≥ 310


≥ 655


≤ 96HRB

≤ 223

EN 10028-7

≥ 300

≥ 340

650-850

≥ 40



EN 10088-2

≥ 300

≥ 340

650-850

≥ 40



EN 10088-4

≥ 300

≥ 340

650-850

≥ 40



IS 6911

≥ 310


≥ 655


≤ 96HRB

≤ 223

Product type: Wire rod

Typical

340

380

680

50




Physical Properties

The typical values of some physical properties are given in the table below.

DensityModulus of elasticityThermal exp. at 100 °CThermal conductivityThermal capacityElectrical resistanceMagnetizable

kg/dm3

GPa

10-6/°C

W/m°C

J/kg°C

µΩm


8.0

195

16,5

14

500

0.85

No


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