Galvanised Flat Bars

Galvanised Flat Bars


Galvanised flat bar is a low carbon steel bar that has been hot dip galvanised in a zinc coating which protects the hot rolled mild steel. Galvanised flat bars have greater resistance to corrosion, compared to mild steel due to the protective layer of zinc. Galvanised flat bar is therefore ideal for outdoor use as it can stand up to the elements, giving it a longer life expectancy. Galvanised flat bars have good weldability and are generally used for fabrication, frameworks and structural applications.


Uses of galvanised flat bar include construction, transportation, structural applications, manufacturing, industrial, food industries, general fabrication, engineering, petroleum, machining and repairs, shipbuilding, chemical plant, transmission line towers and support frames.


Two of the common mild steel grades used for galvanised flat bars are EN10025 S275 and EN10025 S355. EN10025 S275 is a popular mild steel grade utilized in various general engineering and construction applications. As a low carbon steel specifications, EN10025 S275 provides adequate strength with excellent machinability and is ideal for welding. Supplied as a hot rolled non alloy steel, mild steel grade S275 is used widely in the structural, maintenance and manufacturing industries as it has good weldability and machinability.

Mild steel grade EN10025 S355 is also widely used galvanised flat bars, which is has medium tensile strength and is readily weldable. Grade EN10025 S355 is offered in hot rolled, as well as cold drawn condition. For a low carbon steel that offers high yield strength and is highly durable, mild steel grade EN10025 S355 is often used in the most demanding environments that are susceptible to frequent weather fluctuations, such as on offshore structural sites.

Common Grades, Sizes and Specifi­cations

ASTM A36Up to 300mmUp to 6000mmFrom 3.0mm
EN 10025 S275JRUp to 300mmUp to 6000mmFrom 3.0mm
BS4360 Gr43AUp to 300mmUp to 6000mmFrom 3.0mm
EN 10025 S355JRUp to 300mmUp to 6000mmFrom 3.0mm
JIS G3101 SS400Up to 300mmUp to 6000mmFrom 3.0mm


There are two predominant types of galvanised flat bars, hot-dip galvanising and electrogalvanising. For hot-dip galvanising, the steel surface is dipped in molten pure zinc. For zinc plating or electrogalvanising, a thin coating of zinc is applied on a steel surface using an electric current. Electrogalvanising produces a thinner less resilient surface and mostly recommended for interior use.

Hot-Dip GalvanisingApplication of a zinc coating by dipping steel in a molten pool of zinc. Alloy layers such as zinc oxide and zinc carbonate, are formed on the primary metal through reaction with the surrounding atmosphere to form a protect coating.
ElectrogalvanisingAn electrolyte solution is passed through an electric current, which is later applied to the steel. The electric current reduces positively charged zinc ions to zinc metal, which is then deposited on the positively charged steel.
Pre-GalvanisingRolling steel metal through a cleaning agent to quickly prime material for galvanising. The metal is passed through a pool of molten liquid zinc and is instantly recoiled.
Cold GalvanisingApplication of zinc-rich paint to the surface of steel metal to protect it from corrosion.

Other galvanised flat bar grades and sizes are available upon request. You can request to cut your galvanised flat bars down to size.

Kian Huat Metal

Kian Huat Metal is Singapore’s leading galvanised flat bar supplier with a wide distribution network that spans over 20 countries in the Asia Pacific region. With over 30 years of experience, we provide the very best quality products, prompt delivery and highest standard of services at competitive prices. At Kian Huat Metal, we supply an extensive range of metals for various applications. Our inventory includes: stainless steel, structural steel, mild steel, galvanised steel, aluminium, brass, bronze and copper. Our hot rolled and cold rolled steel is available in a wide range of shapes including: bars, rods, universal beams, universal columns, pipes, hollow sections, channels, sheets and plates. We can cut according to your exact specifications.

quality assurance

We ensure product quality and consistency through best practices and quality control that conform to local and international standards.

on time delivery

Our highly skilled team of drivers will ensure your orders are delivered within the time requested.

one stop shop

We offer a competitively priced and extensive range of steel products for all industries.

send an enquiry

If you have any questions related to our products or inquiry, we are happy to assist you. We will answer you via email as soon as possible. If you prefer to be contacted by phone, please leave your phone number. *