High manganese steel pipe with step-out weld zone erosion-corrosion resistance and method of making the same

US11883906B2 · kind B2 · utility

Assignees

• EXXONMOBIL RESEARCH AND ENGINEERING COMPANY · US
• POSCO CO., LTD · KR

Inventors

• HyunWoo Jin · Yongin-si, KR
• Ning Ma · Nanhu, CN
• Adnan Ozekcin · Bethel Park, US
• Andrew J. Wasson · Spring, US
• Douglas P. Fairchild · Sugar Land, US
• IIWook Han · Seonggok-ri, KR
• Sangchul Lee · Anyang-si, KR
• Bongkeun Lee · Heunghae-eup, KR
• Jongsub LEE · Seoul, KR

Key dates

• Filing date: Nov 4, 2019
• Grant date: Jan 30, 2024
• Expiry date: Sep 14, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C38/58
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A metal cored wire for submerged arc welding, the wire comprising a steel sheath with a core comprising powders of: carbon in a range of about 0.3 wt. % to about 1.2 wt. %; silicon in a range of about 0.1 wt. % to about 3.0 wt. %; manganese in a range of about 9.0 wt. % to about 30 wt. %; chromium in an amount less than about 8 wt. %; nickel in an amount less than about 6 wt. %; molybdenum in an amount less than about 6 wt. %; tungsten in an amount less than about 5 wt. %; copper in an amount less than about 4 wt. %; niobium in an amount less than about 2 wt. %; vanadium in an amount less than about 2 wt. %; titanium in an amount less than about 2 wt. %; nitrogen in an amount less than about 0.4 wt. %; boron in an amount less than about 1 wt. %; at least one of: (i) sulfur in an amount less than about 0.3 wt. %; (ii) phosphorous in an amount less than about 0.03 wt. %; or a combination thereof; and the balance with iron.