Overview
CD3MWCuN, also known as 6A, is a high-performance duplex stainless steel engineered for exceptionally harsh environments. This alloy excels in resisting corrosion, particularly in seawater and other challenging conditions, while offering impressive strength. Its "duplex" structure combines the beneficial properties of both austenitic and ferritic stainless steels, resulting in a material with a unique balance of toughness, strength, and corrosion resistance. This combination makes CD3MWCuN a valuable choice for demanding applications where components must withstand both mechanical stress and aggressive corrosive attack.
Typical Uses
Desalination, pulp & paper, marine, oil & gas, mining, and chemical processing applications.
MetalTek Designation
MTEK SD100
Poured At:
Carondelet Division, Sandusky International Division, Wisconsin Centrifugal Division, Wisconsin Investcast Division
* ZERON® is a registered trademark of Rolled Alloys, LTD.
Similar Specifications
Cast UNS: J93380
Wrought UNS: S32760
Wrought Grade: ZERON® 100
Cast Grade: CD3MWCuN, 6A
Cast ASTM: A890, A995
Typical Chemical Composition (% by wt.)
Aluminum: n/a
Carbon: 0.03
Chromium: 24-26
Manganese: 1.00
Iron: n/a
Copper: 0.50-1.00
Nickel: 6.5-8.5
Lead: n/a
Tin: n/a
Silicon: 1.00
Zinc: n/a
Other: Mo 3-4; W 0.50-1.00; N 0.20-0.30
Minimum Mechanical Properties
Heat Treatment: Solution Annealed
Frequently Asked Questions
Duplex stainless steel contains a balanced mix of austenitic and ferritic phases, offering high strength, good corrosion resistance, and better stress corrosion resistance than standard austenitic grades.
Super duplex stainless steel contains a higher percentage of chromium, molybdenum, and nitrogen than standard duplex steel, offering enhanced strength and corrosion resistance.
Super duplex stainless steel offers higher levels of chromium, molybdenum, and nitrogen, leading to enhanced strength and corrosion resistance compared to standard duplex grades. Super duplex is generally preferred in extreme environments.
Duplex stainless steels are highly resistant to rust and other forms of corrosion, although they can be susceptible in highly acidic or chloride-rich environments without proper maintenance.
Commonly used in chemical processing, marine environments, oil and gas, desalination plants, medical devices, and food processing equipment.
They offer superior strength, excellent resistance to stress corrosion cracking, and better weldability compared to many austenitic steels.
Duplex steels offer higher strength and better chloride stress corrosion resistance but lower ductility than austenitic stainless steels.
Industries such as offshore oil and gas, chemical processing, marine engineering, and desalination rely on super duplex stainless steel for its corrosion performance.
