Extra thick hot rolled h section steel and production method therefor

US12281369B2 · kind B2 · utility

Assignee

• MAANSHAN IRON & STEEL CO., LTD. · CN

Inventors

• Meng Xia · Nanhu, CN
• Baoqiao Wu · 旧村, CN
• Meizhuang Wu · 旧村, CN
• Jun Xing · Meekrap-oord, CN
• Jie Wang · Kunming, CN
• Hui-Pin Chen · Taipei, TW
• Jingcheng Yan · 旧村, CN
• Qi Huang · Taoyuan, TW
• Lin Peng · South San Francisco, US
• Junwei HE · 旧村, CN
• Zhaohui Ding · 旧村, CN
• Qiancheng Shen · 旧村, CN

Key dates

• Filing date: Oct 27, 2021
• Grant date: Apr 22, 2025
• Expiry date: Dec 16, 2041

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P10/20
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The present invention discloses a extra thick hot rolled H section steel and a production method therefor. The extra thick hot rolled H section steel contains, by mass, the following chemical components: 0.04-0.11% of C, 0.10-0.40% of Si, 0.40-1.00% of Mn, 0.40-1.00% of Cr, 0.10-0.40% of Cu, 0.020-0.060% of Nb, 0.040-0.100% of V, 0.010-0.025% of Ti, 0.010-0.030% of Al, 0.0060-0.0120% of N, not more than 0.015% of P, not more than 0.005% of S, not more than 0.0060% of O, and the balance Fe and trace residual elements, wherein 0.090%≤Nb+V+Ti≤0.170%, 6.5≤(V+Ti)/N≤10.5, and 0.30%≤CEV≤0.48%. The extra thick hot rolled H section steel has a flange thickness of 90 mm-150 mm, has excellent comprehensive mechanical properties, and can well meet the needs for heavy supporting structural parts of high-rise buildings, large squares, bridge structures, etc.