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UNS S31803 Bar

Alternative and trade names
EN 1.4462, UNS S31803, UNS S32205, ASTM A182 Grade F51,ASTM A182 Grade F60
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Description

Duplex UNS S31803 is the most common duplex grade in the market. It has very good resistance to localized corrosion and stress corrosion cracking in combination with high mechanical strength. It is widely used in Oil & Gas Industry, hydro power, pressure vessels, pulp & Equipment for the Paper Industry, Paper Industry, structural components and chemical tankers. The alloy is not intended to be used at temperatures above 300°C due to embrittlement.

Related Standards

Properties

Dimension

Diameter d

6 - 410 mm

Mechanical

Elongation A

25 % at 20 °C

Hardness, Brinell HB

270 [-] at 20 °C

Impact strength, Charpy notched Ivnot

45 kJ/m² at -46 °C

Tensile strength Rm

650 - 880 MPa at 20 °C

Yield strength Rp0.2 Rp0.2

450 MPa at 20 °C

Chemical properties

Element

Weight %

Comment

Cr

21 - 23 %

Ni

4.5 - 6.5 %

Mo

2.5 - 3.5 %

Mn

2 %

Si

1 %

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Technological properties

Application areas

The main applications are for details with special requirements for high corrosion resistance.

Processing history

Solution annealing at 1020 – 1100°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.