Effect of Cr on the properties of 460 MPa anti-seismic and fire-resistant construction steel

Du Ping; Wu Fengjuan; Qu Jinbo; Cong Jinghua; Wang Xuemin

doi:10.7513/j.issn.1004-7638.2021.04.023

Volume 42 Issue 4

Aug. 2021

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Article Navigation > IRON STEEL VANADIUM TITANIUM > 2021 > 42(4): 138-143

Du Ping, Wu Fengjuan, Qu Jinbo, Cong Jinghua, Wang Xuemin. Effect of Cr on the properties of 460 MPa anti-seismic and fire-resistant construction steel[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 138-143. doi: 10.7513/j.issn.1004-7638.2021.04.023

Citation:

Du Ping, Wu Fengjuan, Qu Jinbo, Cong Jinghua, Wang Xuemin. Effect of Cr on the properties of 460 MPa anti-seismic and fire-resistant construction steel[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 138-143. doi: 10.7513/j.issn.1004-7638.2021.04.023

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Effect of Cr on the properties of 460 MPa anti-seismic and fire-resistant construction steel

doi: 10.7513/j.issn.1004-7638.2021.04.023

1.
Branch of Plate and Strip, Institute of Research of Iron and Steel, Sha Steel Group, Zhangjiagang 215625, Jiangsu, China
2.
School of Material Science and Engineering，University of Science and Technology Beijing，Beijing 100083, China

Received Date: 2021-01-08
Publish Date: 2021-08-10

Abstract

Abstract

The anti-seismic and fire-resistant 460 MPa construction steels with different Cr content were designed to analyze the microstructure, performance at room temperature and elevated temperature. Both 0.4%Cr and 0.8%Cr steels meet the standards of anti-seismic and fire-resistant steel, that is, yield ratio is less than 0.83 and yield strength is more than 307 MPa after 3 hours soaking at 600 ℃. The precipitations were simulated and analyzed by simulation software and using OM and TEM. It is concluded that increasing Cr content has an effect on improving of yield stress at room temperature and the reduction of yield strength ratio. With the increase of Cr content, high elevated temperature instability precipitations and the content of Mo in the precipitations can be decreased and Mo in the matrix can be raised. It has a positive effect on enhanced high elevated temperature solution strengthening and fire-resistance of construction steel because of Mo solid solutions.
- construction steel,
- Cr,
- anti-seismic,
- fire-resistance,
- yield ratio

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References(13)

References

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