Zincanneal Steel Product Range, their Differences and Similarities

Zincanneal steel is characterized by resilience and enhanced strength. That is the reason it has quickly emerged as the steel of choice for a number of different manufacturers across Australia.

Now, Zincanneal has its own product range with their distinctive characteristics. In this post, we will cover the product range at Zincanneal and also understand the differences between them.

Zincanneal G2S Steel

As with Zincanneal as a whole, Zincanneal G2S steel is commercial forming steel which has been matte hot-dipped in a metal alloy of zinc and iron.

Zincanneal G2S steel ranges from 0.5mm to 2mm in thickness. The typical coating class associated with Zincanneal G2S steel is ZF100 while other options include ZF80, 60F60 and 45F45.

In terms of Australian standards, we are looking at AS 1365 and AS 1397:2001 for Zincanneal G2S steel.

Chemical properties of Zincanneal G2S steel include guaranteed maximum percentages of:

  • Manganese (Mn) – 0.45
  • Carbon (C) – 0.10
  • Sulphur (S) – 0.03
  • Phosphorus (P) – 0.025

For the normal supply product of Zincanneal G2S steel (ZF100), typical product ranges for 0.6mm thickness are 300-370 MPa of Yield Strength and 360-420 MPa of Tensile Strength. The same MPa figures for 2mm thickness are from 260-310 and 340-370 respectively.

Factors that make Zincanneal G2S Steel such an Attractive Proposition

Manufacturers are drawn to G2S steel due to its excellent ratings on a number of fabrication benchmarks. For instance, whether it is pre-treatment painting, welding, roll-forming or bending, Zincanneal G2S steel scores a best-in-class rating of 5. Even when it comes to pressing or drawing, its rating is an excellent 3.

Zincanneal G2S Steel Applications

Thanks to its durability and resistance to the elements, Zincanneal G2S steel finds a number of different applications which include a whole host of exposed painted panels; non-exposed automotive panels; commercial freezers and refrigerators; acoustic ceiling tiles; washing machines; switchboards; and door frames to name a few.

Zincanneal G3NS and G3NS-E Steel

Similar to G2S steel, G3NS and G3NS-E steel is also matte hot-dipped in an alloy of zinc and iron. At the same time, Zincanneal G3NS steel goes one step ahead of G2S steel by guaranteeing non-ageing.

Zincanneal G3NS steel ranges from 0.6mm to 1.6mm in thickness. The typical coating class associated with Zincanneal G3NS steel is 45F45 while other options include ZF80, ZF100 and 60F60.

The Australian standards for Zincanneal G3NS steel are AS 1365 and AS 1297:2001.

Guaranteed maximum percentages for the chemical properties of Zincanneal G3NS steel are as follows:

  • Manganese (Mn) – 0.40
  • Carbon (C) – 0.08
  • Sulphur (S) – 0.025
  • Phosphorus (P) – 0.02

For the usual coating class option of Zincanneal G3NS steel (45F45), standard product ranges for 0.6mm thickness are 150-190 MPa of Yield Strength and 290-330 MPa of Tensile Strength.  For 1.6mm thickness these same MPa figures range between 160-190 and 280-310 respectively.

Attraction Quotient of Zincanneal G3NS steel

Like in the case of Zincanneal G2S steel, G3NS steel also scores very well on fabrication benchmarks. In fact, it goes a few notches ahead! For instance, it has the highest (5) rating on five different fabrication methods – welding, lock-forming, pre-treatment painting, roll-forming and bending. On two other methods, drawing and pressing, Zincanneal G3NS steel scores a very healthy rating of 4.

Zincanneal G3NS Applications

Due to the added degree of strength and durability possessed by Zincanneal G3NS – as compared to G2S steel, it makes an excellent choice for automotive panels and components including ones which may be exposed to the elements. Otherwise, with G2S steel, we observe more frequent usage in case of non-exposed automotive panels.


Both Zincanneal G2S steel and Zincanneal G3NS steel have their distinctive sets of features and facets. Above we highlighted some prominent differences between the two.

At the same time, it would be imperative to note that both these Zincanneal steel product ranges have commonalities between them as well. For instance, if we look at the Fire Hazard Properties Index of both, they score the best (0) on all, viz. Ignitability, Spread of Flame, Heat Evolution, and Smoke Development. Therefore, from a fire safety perspective, both these Zincanneal steel types make an excellent choice.

Also, when it comes to usage post acquisition, it is recommended that both these steel types are used within 6 months. Otherwise, there is a chance of storage related corrosion occurring.

Finally, both Zincanneal G2S and G3NS steel types are not suitable for coil form painting or even forming post painting since both are susceptible to paint adhesion related issues.


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