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ALLOY 1.4547 Plate

Alternative and trade names
EN 1.4547, UNS S31254, ASTM Grade F44
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Description

The 6 Mo super austenitic steel combines moderate tensile strength and high ductility with excellent corrosion resistance in seawater and variety of industrial environment. Typically the alloy has PREN of 42-44, which ensure that the resistance to pitting corrosion is high. High resistance crevice corrosion.

Related Standards

Properties

Dimension

Length l

2500 - 6000 mm

Thickness t

1 - 50 mm

Width w

1250 - 2000 mm

Mechanical

Elongation A

35 % at 20 °C

Hardness, Brinell HB

260 [-] at 20 °C

Impact strength, Charpy notched Ivnot

45 kJ/m² at -46 °C

Tensile strength Rm

655 MPa at 20 °C

Yield strength Rp0.2 Rp0.2

300 MPa at 20 °C

Chemical properties

Element

Weight %

Comment

Cr

19.5 - 20.5 %

Ni

17.5 - 18.5 %

Mo

6 - 6.5 %

Mn

1 %

Si

0.8 %

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Technological properties

Application areas

High resistance to general corrosion. Typical applications: Pumps, valves, chokes, pipework/flanges and manifolds in Oil & Gas Industry.

Processing history

Solution annealing at min 1150°C followed by water quenching

Welding

Very good.

This material data has been provided by Sverdrup Steel.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.