COMMON TRADE NAMES: Duplex, 22 Chrome, SAF® 2205
Alloy 2205 is a duplex stainless steel with a nitrogen addition for improved corrosion resistance, particularly where welding is required. In the annealed condition, alloy 2205 has more than twice the strength of conventional austenitic stainless steels and, in many environments, exhibits corrosion resistance superior to alloy 316. It is the most widely used of the duplex stainless steels. Alloy 2205 is commonly referred to as 22 Chrome and the universal designation of UNS N31803.
Alloy 2205 is used in environments high in chlorides such as marine applications, oil and gas production, and in heat exchangers using chloride-bearing water as a coolant. CRA offers specialty alloy 2205 seamless pipe & tube for use in multiple industries and applications, including:
|≤ 0.03||21 - 23||4.5 - 6.5||BAL||≤ 2||≤ 1||2.5 - 3.5||≤ 0.03||≤ 0.02||0.08 - 0.2|
ASTM A789, ASTM A790, ASME SA789, ASTM SA790
Per ASTM A789 / A790
|Tensile Strength||Yield Strength||Elongation||Hardness|
|minimum, ksi||minimum, ksi||minimum, %||HRC|
|Elastic Modulus||103 ksi||29.0||28.2||27.0||26.2|
|Steel Making||Electric Arc Furnace followed by Vacuum Oxygen Decarburization (VOD) or Argon Oxygen Decarburization (AOD).|
|Pipe Making||Conventional Seamless Cold Finished Pipe and Tube Manufacturing Processes.|
|Heat Treatment||Cannot be hardened by heat treatment. May be provided in the annealed or cold hardened condition.|
CRA offers this alloy in:
MIN OD: 2-1/16″ (2.0625″)
MAX OD: 10-3/4″ (10.750”)
THICKNESS: Up to 1.925”
LENGTHS: Up to 70′
Standard & Non-Standard Sizes Available.
Manufactured Material Available as Quickly as 1 Week.
Non-Standard Mill Quantities Accommodated