SS400, SS490 and SS540 rebars are different grades of steel bars for construction specified in the Japanese Industrial Standard (JIS). They are mainly used in various construction and civil engineering structures. Here is some basic information and uses of these three types of rebars:
SS400 Rebar: SS400 rebar is a common general structural steel with a tensile strength between 400-510MPa and a yield strength of about 245MPa2. In China, SS400 is often compared with Q235 steel, and although there are some minor differences in performance, they can be used interchangeably3. SS400 rebar is widely used in building structures, bridge engineering, machinery manufacturing, and automobile manufacturing due to its good mechanical properties and corrosion resistance.
SS490 Rebar: SS490 rebar has a higher strength than SS400, with higher yield strength and tensile strength. It is suitable for structures with higher strength requirements, such as high-rise buildings, large bridges, and heavy machinery parts. Due to its higher strength, SS490 rebar is able to provide better safety margin and durability.
SS540 Rebar: SS540 rebar is a higher strength grade rebar with higher tensile strength and yield strength than SS400 and SS490. This rebar is suitable for structures under extreme conditions, such as important buildings in earthquake-prone areas, super high-rise buildings and bridges of particular importance. The high strength characteristics of SS540 rebar make it an ideal choice for critical structures that need to withstand huge loads and stresses.
In general, SS400, SS490 and SS540 rebars play an important role in construction and civil engineering, and their selection depends on the structural requirements, expected loads and environmental conditions of the specific project. The use of these rebars ensures the safety, stability and durability of buildings and infrastructure.
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