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CHIKO Solar designs and manufactures high quality solar mounting systems for pitched roof......learn more>>


Steel or Aluminum material for solar mounting system, How to choose? See what CHIKO say for your reference.


Many new customers do not know too much about how to select material of Solar brackets, resulting in the unadaptability of the scheme and inefficiency, below I will introduce you to the advantages and disadvantages between steel and aluminum solar mounting.


Steel and aluminum strength钢与铝材料强度方面


The solar mounting material generally adopts Q235B steel and aluminum alloy extruded profile 6005-T5, in terms of strength, 6005-T5 aluminum alloy is about 68%-69% of Q235B steel, so generally in strong wind areas, Solar mounting rail span is relatively large and other situations , steel is better than aluminum alloy profile. In the other words, steel is better for utility project.

太阳能支架一般采用Q235B钢材与铝合金挤压型材6005 T5,强度方面,6005-T5铝合金大概为Q235 B钢材的68%-69%,所以一般在强风地区, 跨度比较大等情况下,太阳能支架钢材优于铝合金型材。

Deflection deformation挠度变形方面

Under the same conditions, the deformation of aluminum alloy profile is 2.9 times that of steel, the weight is 35% of steel, and the cost is 3 times that of steel under the same weight. Therefore, generally in strong wind areas, solar mounting rail span is relatively large, considering cost and other conditions steel is better choice.



Anti-corrosion aspects防腐蚀方面

Aluminum alloy in the standard atmospheric environment, in the passivation zone, its surface forms a dense oxide film, hindering the surface of the activated aluminum matrix from contacting the surrounding atmosphere, so it has very good corrosion resistance, and the corrosion rate decreases with the extension of time.



In the standard environment, the galvanized thickness of 80μm can be guaranteed to be used for more than 20 years, but in high-humidity industrial areas or high-salinity coastal or even temperate seawater, the corrosion rate is accelerated, and the galvanizing thickness usually needs to reach more than 100μm and requires regular maintenance every year.



Surface treatment comparison表面处理对比

There are many surface treatment methods for aluminum alloy profiles, such as anodizing, chemical polishing, etc. Beautiful appearance and can adapt to a variety of strong corrosive environments. Steel generally adopts hot-dip galvanizing, surface spraying, paint coating and other methods. The appearance is worse than that of aluminum alloy profiles, and it is also inferior to aluminum profiles in terms of corrosion resistance.



In comprehensive comparison, aluminum is light in weight and strong in corrosion resistance, and it is better to use aluminum alloy as a bracket for rooftop power stations with load-bearing requirements/corrosive environment/chemical plant power stations. Steel has high strength and small deflection deformation when bearing load, generally used for relatively large parts in hand, and is more suitable for solar bracket power stations with large winds and span requirements.


All in one sentence, for small solar project, choose Aluminum mounting system, easy and quick to install and to save labor cost. For utility solar power project, choose Steel mounting system, designed and manufactured according to project requirements.

总言之, 面对小型项目, 我的大部分推荐铝质, 方便施工。 面对大型电站项目我们推荐钢质,根据项目定制性高。


CHIKO SOLAR has been deeply involved in the Solar mounting market for 16 years, we are  manufactory, we export by self , we have technical team, also have a number of international certifications. Welcome more solar mounting or OEM solar bracket question consulted us !   please feel free to contact us!



Above news from CHIKO Sales & Marketing department

Add: No 680 Xingwen Rd. Jiading dist. Shanghai 201801 China



Fax : +86 (21)59972938

Phone: +86(21) 59972267 59973712 59973713--811