EDX 2304 Square Tube – High-Performance Duplex Stainless Steel for Corrosion Resistance

EDX 2304 according to MDS D35 has an improved balanced chemistry of chromium, molybdenum and nitrogen. Increased mechanical strength compared to the standard UNS 32304. EDX 2304 outruns both 1.4404 and 1.4436 with respect to pitting corrosion resistance. Due to risk of embrittlement, duplex steels should not be used at temperatures above 250 – 325°C.

Properties

Dimension

Property	Value
Thickness	4 - 8 mm
Width	60 - 250 mm

Mechanical

Property	Temperature	Value	Comment
Charpy impact energy, V-notch	-46.0 °C	45 J
Elongation	23.0 °C	25 %
Hardness, Brinell	23.0 °C	290 [-]
Tensile strength	23.0 °C	630 MPa
Yield strength Rp0.2	23.0 °C	500 MPa	T<13MM

Chemical properties

Property	Value
Carbon	0.03 %
Chromium	22 - 24 %
Copper	0.1 - 0.6 %
Iron	Balance
Manganese	2 %
Molybdenum	0.1 - 0.6 %
Nickel	3.5 - 5.5 %
Nitrogen	0.05 - 0.2 %
Other	B: 35 PPM
Phosphorus	0.04 %
Silicon	1 %
Sulfur	0.015 %

Technological properties

Property
Application areas	The main applications are for details with special requirements for high corrosion resistance.
Corrosion properties	Good resistance to stress corrosion cracking, Good resistance to pitting and crevice corrosion, High resistance to general corrosion, High resistance to erosion corrosion and corrosion fatigue. PREN ≥ 28
Heat Treatment	Solution annealing at 1020 – 1100°C followed by water quenching
Welding	Very good

EDX 2304 L Profile: Superior Strength & Corrosion Resistance Alloy 31 Stainless Steel Plate – Superior Strength & Ductility for Extreme Environments

Metal