UNS S31803 Duplex Stainless Steel Plate – High Strength & Corrosion Resistance

Duplex UNS S31803 is the most common duplex grade in the market 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.

Properties

Dimension

Property	Value
Length	2000 - 6000 mm
Thickness	1 - 50 mm
Width	1000 - 2000 mm

Mechanical

Property	Temperature	Value
Charpy impact energy, V-notch	-46.0 °C	45 J
Elongation	23.0 °C	25 %
Hardness, Brinell	23.0 °C	270 [-]
Tensile strength	23.0 °C	650 - 880 MPa
Yield strength Rp0.2	23.0 °C	450 MPa

Chemical properties

Property	Value
Carbon	0.03 %
Chromium	21 - 23 %
Iron	Balance
Manganese	2 %
Molybdenum	2.5 - 3.5 %
Nickel	4.5 - 6.5 %
Nitrogen	0.1 - 0.22 %
Phosphorus	0.03 %
Silicon	1 %
Sulfur	0.015 %

Technological properties

Property
Application areas	It is widely used in Oil & Gas Industry, hydro power, pressure vessels, pulp & Equipment for the Paper Industry, structural components and chemical tankers.
Corrosion properties	High resistance to stress corrosion cracking in halide containing environments, High resistance to pitting and crevice corrosion, High resistance to general corrosion, High resistance to erosion corrosion and corrosion fatigue. PREN ≥ 34
Heat Treatment	Solution annealing at 1020 – 1100°C followed by water quenching.
Welding	Very good

ASTM A463 SS Grade 340 Class 2 – Hot‑Dip Aluminum Coated Low‑Carbon Steel UNS S32750 Rolled Plate – Premium Super Duplex Stainless Steel

Metal