JIS standard H-beam SS400
SS400 H section steel is an outstanding structural steel. Due to its excellent strength-to-weight ratio and high corrosion resistance, it is an important component of a wide range of engineering and construction projects.
Known for its excellent weldability and machinability, SS400 structural steel H beam is characterised by significant features that set it apart from similar mild steels.
SS400 h beam steel structure chemical composition
| Symbol of grade | C | Mn | P | S |
| SS400 | - | - | ≤0.050 | ≤0.050 |
sS400 h section steel beams mechanical property
| Symbol of grade | Yield point or proof strength N/mm2 |
Tensile strength N/mm2 |
Elongation | Bendability | |||||||
| Thickness a) mm |
Thickness a) mm |
Test piece |
% | Bending angle | Inner radius | Test piecec) | |||||
| ≤16 | >16 ≤40 |
>40 ≤100 |
>100 | ||||||||
| SS400 | ≥245 | ≥235 | ≥215 | ≥205 | 400 to 510 | ≤5 in thickness of steel plates/sheets, strips in coil and flats | No. 5 | ≥21 | 180° | 1.5 x thickness |
No. 1 |
| >5 ≤16 in thickness of steel plates/sheets, strips in coil and flats | No. 1A | ≥17 | |||||||||
| >16 ≤50 in thickness of plates/sheets, strips in coil and flats | No. 1A | ≥21 | |||||||||
| >40 in thickness of plates/sheets and flats | No. 4 | ≥23 b) | |||||||||
| ≤25 in diameter or distance across flats of bars | No.2 | ≥20 | 180° | 1.5 x diameter or distance across flats | No. 2 | ||||||
SS400 h shaped steel beam Characteristics
The properties of SS400 and mild steel play an important role in the selection of various construction and engineering applications.
SS400 is known for its excellent weldability and workability compared to mild steel. Low carbon content is also one of its properties, making it an ideal material for making delicate components.
When considering corrosion resistance, SS400 again stands out. Its inherent resistance to oxidation makes it the best choice for projects exposed to harsh weather or corrosive environments. In contrast, mild steel requires additional treatments, such as galvanising, to enhance its corrosion resistance.
In terms of strength and durability, the two materials have their own merits; SS400's high strength-to-weight ratio makes it the preferred choice for weight-conscious structures. On the other hand, the superior strength of mild steel makes it ideal for heavy-duty applications.
SS400 h type steel beam Products image
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