Steel strip having a low Si content

US9695493B2 · kind B2 · utility

Assignee

• TATA STEEL IJMUIDEN B.V. · NL

Inventors

• Egbert Jansen · Purmerend, NL
• Edward Anton Frederik Span · Nieuw-Vennep, NL
• Richard Mostert · Heemskerk, NL
• Theo Arnold Kop · Haarlem, NL

Key dates

• Filing date: Apr 5, 2013
• Grant date: Jul 4, 2017
• Expiry date: Jul 29, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12799
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A dual phase or complex phase steel strip showing no tigerstripes. The steel strip having an ultimate tensile strength Rm classifying for 1000 MPa steel category, includes (in mass percent) C 0.09-0.19%; Mn 1.9-2.6%; Si at most 0.1%; Cr 0.4-0.8%; Mo at most 0.3%; Ni at most 0.4%; Al 0.02-1.3%; and optionally one or more of the following elements: Nb at most 0.08%; P equal to or more than 0.0005%; N equal to or less than 0.015%; Ti equal to or less than 0.1%; V equal to or less than 0.1%; B equal to or less than 0.01%; wherein the sum of Cr, Mo and Ni is at least 0.5%; the balance being Fe and inevitable impurities.