2205 Duplex Steel (S32205 Steel) Comprehensive Characteristics and Application Analysis

2205 Duplex Steel, also known as S32205 Steel, is a high-performance stainless steel with a dual-phase structure of austenite and ferrite. Its core advantages lie in high strength, excellent corrosion resistance and good welding performance. It is widely used in harsh environments such as chemical, petroleum, and marine engineering.

Implementation standards:

ASTM A240/ASME SA-240, ASTM A276, ASTM A182/ASME SA-182, ASTM A312/ASMES A312

Physical properties:

2205 Duplex Steel Density: 7.98g/cm3, Melting point: 1300-1390 ℃, magnetic properties: none

Mechanical properties:

Tensile strength: σb ≥ 795Mpa, yield strength σb ≥ 550Mpa: elongation: δ ≥ 15%, hardness ≤ 310 (HB)

Corrosion resistance:

2205 duplex stainless steel 2205 alloy is superior to 316L and 317L austenitic stainless steel in terms of pitting and crevice corrosion resistance. It has high corrosion resistance, lower thermal expansion coefficient and higher thermal conductivity than austenite. Compared with austenitic stainless steel, duplex stainless steel 2205 alloy has twice the compressive strength, and designers can reduce its weight compared with 316L and 317L. 2205 alloy is particularly suitable for temperatures within the range of -50°F/+600°F, and can also be used at lower temperatures under strict restrictions (especially for welded structures).

Application areas:

Oil and gas industry equipment; offshore platforms, heat exchangers, underwater equipment, fire fighting equipment; chemical processing industry, utensils and pipeline industry; desalination, high-pressure RO equipment and submarine pipelines; energy industry such as power plant desulfurization and denitrification FGD systems, industrial scrubbing systems, absorption towers; mechanical parts (high-strength, corrosion-resistant, wear-resistant parts)