Stainless 2205, Duplex 2205, Uns S31803, Stainless Steel 2205

duplex pipe grade

What is the difference between 304 and 316 stainless steel?

Stainless 316 contains more nickel than stainless 304, while 304 contains more chromium than 316. Stainless 304 usually consists of 18% chromium and 8% nickel. Stainless 316 is made up of 16% chromium, 10% nickel and 2% molybdenum. The two steel grades are comparable in appearance, chemical makeup and characteristics.

We produce ASTM/ASME Grade 304, Grade 304L,304h, 316, 316L, 316H, 316TI, 321, 321H, 309S, 309H, 310S, 310H, 410S, 2205, 904L, 2507, 254, gh3030, 625, 253MA, S30815, 317L, Type 317, 316lN, 8020, 800, 800H, C276, S32304 and others special requirement stainless steel grade.

However, since duplex stainless steels have more austenite than ferritic steels, they might be barely less . Even if austenitic steels are usually non-magnetic, they can present some magnetic property based mostly on the precise alloy composition and the work hardening given throughout production. Austenitic stainless steels are divided into the collection 200 (chromium-manganese-nickel alloys) and 300 (chromium-nickel alloys like 304, 309, 316, 321, 347, and so on).

Comparing with ferritic stainless, duplex chrome steel has greater plasticity, ductility and better intergranular corrosion resistance and . It retains similar 475°C brittleness with ferritic stainless and excessive thermal conductivity. Duplex has improved yield strength, resistance to intergranular corrosion, stress corrosion, corrosion fatigue and abrasion & corrosion compared with austenitic stainless steel. Duplex and super duplex stainless steels are weldable and have moderate formability.

Duplex stainless steels present very good stress corrosion cracking resistance, a property they’ve “inherited” from the ferritic facet. SCC is usually a problem beneath certain circumstances for normal austenitics similar to 304 and 316.

The microstructure of austenitic stainless steels is obtained with the addition of nickel, manganese, and nitrogen that give weldability and formability properties to the alloy. The resistance to corrosion may be additional improved by augmenting the share of chrome, moly, and nitrogen to the base alloy. Austenitic stainless steels have a excessive quantity of austenite which makes them principally non-magnetic. Even though grades similar to 304 and 316 stainless-steel have excessive amounts of iron of their chemical composition, austenite they’re non-ferromagnetic.

  • Because of this duplex nature, it’ll show properties characteristic of each austenitic and ferritic stainless steels.
  • Strengths of duplex stainless steels can in some circumstances be double that for austenitic stainless steels.
  • Duplex stainless-steel plate accommodates comparatively excessive ranges of chromium (between 18% and 28%) and low to reasonable quantities of nickel (between 1.5% and eight%).
  • Duplex stainless steels are extraordinarily corrosion resistant, work hardenable alloys.

METLINE Industries is a one producer, and provider of seamless and welded duplex fittings, duplex flanges and duplex pipes. METLINE provides an entire vary of duplex stainless-steel pipe fittings similar to duplex reducer, duplex elbow, duplex tee, duplex cross, duplex stub ends and duplex pipe . Our stock for duplex seamless and welded pipes is likely one of the most in depth on the planet.

As the fabric cools, approximately half of it adjustments to an austenitic construction. The result is an alloy with a microstructure of roughly 50% austenite and 50% ferrite. Duplex alloys have greater power and better stress corrosion cracking resistance than most austenitic alloys and higher toughness than ferritic alloys, particularly at low temperatures. Ferritic stainless steels are sometimes magnetic as they’ve giant portions of ferrite in their chemical composition. The combination of a ferritic crystal construction with iron makes ferritic stainless steels magnetic.


time��7 to 15 days, depends on the quantity

Duplex stainless steels are called “duplex” as a result of they’ve a two-part microstructure consisting of grains of ferritic and austenitic stainless-steel. The picture exhibits the yellow austenitic part as “islands” surrounded by the blue ferritic section. When duplex stainless-steel is melted it solidifies from the liquid part to a totally ferritic construction. As the fabric cools to room temperature, about half of the ferritic grains transform to austenitic grains (“islands”).

We have thousands tons stock of stainless steel sheet and coil with various size and grade,mainly include austenitic stainless steel, martens stainless steel (including precipitation hardened stainless steel sheet & coil), ferritic stainless steel, and duplex stainless steel.

Characteristics of Stainless Steel Sheet and Plate:
High corrosion resistance
High strength
High toughness and impact resistance
Temperature resistance
High workability, including machining, stamping, fabricating and welding
Smooth surface finish that can be easily clean

Chemical Composition

Is duplex magnetic?

Duplex stainless steels are typically magnetic because they contain a mixture of austenite and ferrite. The substantial amount of ferrite (which is magnetic) contributes to Duplex steels being magnetic. However, since duplex stainless steels have more austenite than ferritic steels, they may be slightly less magnetic.

However, some ferritic stainless steels could have a weaker magnetic pull than normal carbon steel. The mixture of chromium, molybdenum and nitrogen convey the great resistance of 2205 to chloride pitting and crevice corrosion. This resistance is extraordinarily necessary for providers corresponding to marine environments, brackish water, bleaching operations, closed loop water methods and a few meals processing purposes. The high chromium, molybdenum and nitrogen contents of 2205 provide corrosion resistance superior to widespread stainless steels, similar to, 316L and 317L in most environments.

duplex pipe grade
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