Steel-N.com Product Development

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1. Product Characteristics

Due a sudden rise in temperature, the tensile strength of general steel deteriorates rapidly in case of fire in steel-framed structures. Therefore the law stipulates fireproof coating on the steel framework to ensure structural safety. However the trend is to forgo fireproof coating to facilitate construction. As a measure to counter this trend, fireproof steel was developed to maintain high strength in high temperatures.

2. Product Status

Product	Standard	Usage	Available Sizes
Plate	FR490B	Building structures, parking lots, etc.	Thickness: 6 ~ 70 mm

3. Level of Quality

Classification	Standard	Chemical Composition	Yield Strength
Classification	Standard	Chemical Composition	Room Temperature	300°C	600°C
FR Steel	FR-490B	Cr-Mo	≥ 33kg/mm²	≥ 22kg/mm²	≥ 22kg/mm²
General Steel	SM490B	C-Mn	≥ 33kg/mm²	≥ 22kg/mm²	-