Differences Between Malleable Galvanized Fittings And Galvanized Malleable Iron Fittings

Apr 12, 2024 | News

“Malleable galvanized fittings” and “galvanized malleable iron fittings” might sound quite similar, but there are differences between them:

Material Composition

Malleable Galvanized Fittings: These fittings are typically made from malleable steel that has been coated with a layer of zinc through the process of galvanization. Malleable steel is a type of steel that has undergone heat treatment to become more ductile and less brittle.

Galvanized Malleable Iron Fittings: These fittings are made from malleable iron, which is iron that has been treated with heat and possibly other processes to make it more malleable. Like malleable galvanized fittings, they are also coated with a layer of zinc for corrosion resistance.

Strength and Durability

When it comes to Malleable Galvanized Fittings, the steel they’re made of might offer a bit more strength than malleable iron. But the real hero here is the galvanized layer—it’s what keeps them standing strong against corrosion.

Galvanized Malleable Iron Fittings are praised for their tough build, making them perfect for handling high-pressure jobs. And with that added galvanized coating, they’re even better at fighting off rust and wear.


Malleable Galvanized Fittings are pretty versatile and you’ll often find them doing their job in plumbing setups like water or gas lines. They’re reliable for everyday use, especially in non-industrial settings.

Galvanized Malleable Iron Fittings are the go-to for tougher jobs. With their strength, durability, and knack for shrugging off corrosion, they’re top picks for industrial gigs and places where things can get pretty rough.


Malleable Galvanized Fittings: These fittings could cost a bit less than galvanized malleable iron fittings because they’re made from different materials and manufactured differently.

Galvanized Malleable Iron Fittings: These could be pricier because malleable iron is stronger and more durable than malleable steel.


Using malleable galvanized fittings:

  • Corrosion Resistance: Galvanization provides a protective layer of zinc on the surface of the fittings. This zinc coating significantly enhances their resistance to rust and corrosion. Malleable galvanized fittings are ideal for use in environments where exposure to moisture or corrosive substances is common.
  • Durability: Malleable cast iron is known for its strength and toughness. These fittings can withstand mechanical stress, making them suitable for various applications. They are commonly used in plumbing, industrial systems, and construction.
  • Easy Installation: Malleable galvanized fittings come with standard screw threads (usually NPT or BSP). This makes installation straightforward—simply tighten the fittings using appropriate tools. No welding or specialized equipment is required.
  • Versatility: These fittings are available in various shapes, including elbows, tees, couplings, and floor flanges. They can be used to create complex piping configurations. Suitable for both residential and commercial projects.
  • Cost-Effective: Malleable galvanized fittings offer a good balance between cost and performance. They are more affordable than some other materials (such as stainless steel) while still providing durability and longevity.
  • Fire Resistance: Malleable cast iron has inherent fire-resistant properties. It can withstand high temperatures without deforming or weakening. This makes it suitable for applications where fire safety is crucial.

Using galvanized malleable iron fittings:

  • High Strength and Durability: These fittings are designed according to the EN 10242 standard and are available in both black and hot-dip galvanized versions. The material ensures resistance against mechanical stress and long durability1. They can withstand high pressures without leaking or rupturing.
  • Mechanical Strength: Malleable cast iron fittings are known for their mechanical strength. When combined with standardized jointing methods, they can be used in a wide range of applications1. This makes them suitable for various piping systems.
  • Corrosion Resistance: Galvanized malleable iron fittings combine the advantages of malleable cast iron and galvanized technology. They exhibit good corrosion resistance due to the galvanized surface. This makes them suitable for use in different environments.
  • Threaded for Standardized Connections: These fittings are threaded according to EN 10226-1, allowing for standardized pipe connections. The precise manufacture ensures accurate pipe lining over longer lengths, enabling high metallic pressure for sealing.
  • Cost-Effective: Galvanized malleable iron fittings have a relatively low material cost compared to steel or copper alternatives.
malleable iron fittings dimensions

In a nutshell, even though both kinds of fittings have galvanized coatings and are malleable, they differ in material, strength, durability, where they’re used, and cost. Choosing between them depends on what’s needed for the job and budget constraints.