UNS S82031 Duplex Stainless Steel

UNS S82031 Duplex Stainless Steel

UNS S82031 Duplex Stainless Steel General Characteristics Ferritic-austenitic stainless steels also referred to as duplex stainless steels, combine many of the beneficial properties of ferritic and austenitic steels. Due to the relatively high content of chromium and nitrogen, these steels offer...
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UNS S82031 Duplex Stainless Steel

General Characteristics

Ferritic-austenitic stainless steels also referred to as duplex stainless steels, combine many of the beneficial properties of ferritic and austenitic steels. Due to the relatively high content of chromium and nitrogen, these steels offer good resistance to localized and uniform corrosion.


Characteristic properties are: • Increased formability compared to other duplex grades • High mechanical strength • Good resistance to uniform corrosion • Good resistance to pitting and crevice corrosion • High resistance to stress corrosion cracking and corrosion fatigue • Good abrasion and erosion resistance • Good fatigue resistance • High energy absorption • Low thermal expansion • Good weldability


Typical Applications

UNS S82031 Duplex Stainless Steel provides a totally new stainless steel solution for applications where the formability of other duplex grades is not sufficient or limits the design efficiency. Examples of potential applications are given below: • Plate heat exchangers • Flexible pipes • Pump components • Components for automotive industry • Components for structural design • Domestic heater piping • Central heating piping


Chemical Composition


CMnCrNiMoNOther

Typical








ASME II A SA-240

≤0.05

≤2.50

19.0-22.0

2.0-4.0

0.60-1.40

0.14-0.24


ASTM A240

≤0.05

≤2.50

19.0-22.0

2.0-4.0

0.60-1.40

0.14-0.24


EN 10088-3

0.015-0.030

1.05-1.30

19.90-20.30

2.65-3.00

1.15-1.30

0.180-0.210

Si:0.30-0.50 Cu:0.30-0.50


Mechanical Properties

StandardRp0.2RmRockwellHB

MPa

MPa



Product type: Cold rolled coil and sheet

Typical (thickness 1 mm)

650

850



ASME II A SA-240

≥ 400

≥ 650

≤ 31HRC

≤ 290

ASTM A240

≥ 500

≥ 650

≤ 31HRC

≤ 290


Physical Properties

DensityModulus of elasticityThermal exp. at 100 °CThermal conductivity

kg/dm3

GPa

10-6/°C

W/m°C

7,7

205

12,5

14,5


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