EN 1.4501, ASTM UNS S32760 Stainless Steel

EN 1.4501, ASTM UNS S32760 Stainless Steel

EN 1.4501, ASTM UNS S32760 Stainless Steel General Characteristics Austenitic-ferritic stainless steel also referred to as duplex stainless steels, combine many of the beneficial properties of ferritic and austenitic steels. Due to the high content of chromium and nitrogen, and often also...
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EN 1.4501, ASTM UNS S32760 Stainless Steel

General Characteristics

Austenitic-ferritic stainless steel also referred to as duplex stainless steels, combine many of the beneficial properties of ferritic and austenitic steels. Due to the high content of chromium and nitrogen, and often also molybdenum, these steels offer good resistance to localised and uniform corrosion. 


The duplex microstructure contributes to the high strength and high resistance to stress corrosion racking. Duplex steels have good weldability. All duplex grades have the maximum service temperature restricted to 250 or 325°C according to EN10028-7 or ASME II-D 2007 respectively. 


Typical Applications

• Pulp and paper industry • Desalination plants • Flue-gas cleaning • Cargo tanks and pipe systems in chemical tankers • Seawater systems • Firewalls and blast walls on offshore platforms • Components for structural design • Storage tanks • Pressure vessels • Heat exchangers • Water heaters • Rotors, impellers and shafts


Chemical Composition

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



CMnCrNiMoNOther

Typical

0.02


25.4

6.9

3.8

0.27

Cu:0.70 W:0.70

ASME II A SA-240

≤0.030

≤1.00

24.0-26.0

6.0-8.0

3.0-4.0

0.20-0.30

Cu:0.50-1.00 W:0.50-1.00

ASTM A240

≤0.030

≤1.00

24.0-26.0

6.0-8.0

3.0-4.0

0.20-0.30

Cu:0.50-1.00 W:0.50-1.00

EN 10028-7

≤0.030

≤1.00

24.00-26.00

6.00-8.00

3.00-4.00

0.20-0.30

Cu:0.50-1.00 W:0.50-1.00

EN 10088-2

≤0.030

≤1.00

24.0-26.0

6.0-8.0

3.0-4.0

0.20-0.30

Cu:0.50-1.00 W:0.50-1.00

EN 10088-3

≤0.030

≤1.0

24.0-26.0

6.0-8.0

3.0-4.0

0.20-0.30

Cu:0.5-1.0 W:0.5-1.0

IS 6911

≤0.030

≤1.00

24.0-26.0

6.0-8.0

3.0-4.0

0.20-0.30

Cu:0.50-1.00 W:0.50-1.00


Mechanical Properties

The duplex stainless steels have much higher mechanical strength compared to standard stainless steels. If the high strength of the duplex grades can be utilised, down gauging can be done in many applications leading to cost efficient solutions. The allowable design values may vary between product forms. The appropriate values are given in the relevant specifications. 


The product types P= hot rolled plate, H=hot rolled strip and C=cold rolled coil and strip.


StandardRp0.2Rp1.0RmElongationRockwellHB

MPa

MPa

MPa

%



Product type: Cold rolled coil and sheet

ASME II A SA-240

≥ 550


≥ 750



≤ 270

ASTM A240

≥ 550


≥ 750


≤ 32HRC

≤ 310

IS 6911

≥ 550


≥ 750


≤ 32HRC

≤ 310

Product type: Hot rolled coil and sheet

ASME II A SA-240

≥ 550


≥ 750



≤ 270

ASTM A240

≥ 550


≥ 750



≤ 310

IS 6911

≥ 550


≥ 750


≤ 32HRC

≤ 310

Product type: Hot rolled quarto plate

Typical (thickness 15 mm)

580


830

35


260

ASME II A SA-240

≥ 550


≥ 750



≤ 270

ASTM A240

≥ 550


≥ 750



≤ 310

EN 10028-7

≥ 530


730-930

≥ 25



EN 10088-2

≥ 530


730-930

≥ 25



IS 6911

≥ 550


≥ 750


≤ 32HRC

≤ 310

Physical Properties

The physical properties at room temperature are shown in the table below. Data according to EN10088 or EN10095.


Density

Modulus of elasticity

Thermal exp. at 100 °C

Thermal conductivity

kg/dm3

GPa

10-6/°C

W/m°C

7,8

200

13

15


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