Cast Duplex and Super Duplex Stainless Steel – High-Performance Solutions for Demanding Environments

In industries where corrosion resistance, strength, and durability are mission-critical, few materials perform as well as duplex and super duplex stainless steels. At Malabou, we supply precision-cast duplex and super duplex components that meet the highest quality standards.

Why Choose Duplex and Super Duplex Stainless Steel?

Corrosion Resistance

 Duplex grades (e.g., ASTM A890 Grade 4A) offer excellent resistance to stress corrosion cracking, pitting, and crevice corrosion — making them ideal for aggressive chloride-rich environments.

 Super duplex grades (e.g., ASTM A890 Grade 5A and 6A) push performance further, with PREN (Pitting Resistance Equivalent Number) values exceeding 40, ensuring long service life in seawater and other extreme conditions.

Superior Strength

 Twice the yield strength of standard austenitic stainless steels.

 Allows for thinner section designs, reducing weight without compromising strength.

Cost-Effectiveness Over Lifecycle

 While the initial material cost can be higher, the reduced maintenance, longer service life, and fewer replacements lower total cost of ownership.

Typical Applications

 Marine & Offshore: Propeller hubs, pump housings, valve bodies, and sub-sea connectors.

 Desalination Plants: Intake screens, pump impellers, and piping components.

 Chemical & Process Industries: Reactor parts, agitators, and heat exchanger components.

 Mining & Pulp/Paper: Wear-resistant yet corrosion-proof equipment parts.

Why Cast Components?

Casting duplex and super duplex stainless steels enables:

 Complex shapes in a single piece — reducing welds and weak points.

 Cost savings over multi-part fabricated assemblies.

 Custom alloy optimisation for the application.

Malabou’s Advantage

At Malabou, we combine:

 Metallurgical and design expertise to ensure components meet performance requirements.

 Cost-effective offshore manufacturing through trusted foundry partnerships.

 Quality assurance to international standards, including full chemical and mechanical certification.

Whether you need a one-off prototype or high-volume production, we can deliver cast duplex and super duplex stainless steel components to your exact specifications.

Learn more or request a quote: www.malabou.com