Development of Economic-Type X70 Linepipe Steel Hot Strip

Hong Mei Yang

doi:10.4028/www.scientific.net/AMR.750-752.446

Paper Titles

Alloy Elements Added in Fe-6.5wt% Si Silicon Steel and their Effect on Ductility and Magnetic Properties
p.426

Control of Element and Inclusion for X80 Pipeline Steel
p.431

The Influence of Hot Rolling Process on the Performance of HG70C
p.436

Martensite Phase Transform during Nitrogen-Spray Water Jet Quenching
p.442

Development of Economic-Type X70 Linepipe Steel Hot Strip
p.446

Influence of Primary Austenite Dendrite on the Microstructure and Mechanical Properties of Gray Cast Iron
p.450

Thermal Analysis of Solidification Process and Mechanical Properties in Heavy Section Ductile Iron Casting
p.454

Dephosphorization by Slag Pour out in the Smelting for High Carbon 70 Steel
p.462

The Galvanic Corrosion Behaviors of 13Cr-N80 Steel Couples in NaCl Solution at Different Temperature
p.467

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 750-752Development of Economic-Type X70 Linepipe Steel...

Development of Economic-Type X70 Linepipe Steel Hot Strip

Abstract:

In order to reduce the production cost, economic-type X70 pipeline steels with the thickness of 14.6 and 15.9mm were redesigned . The latest alloy system of pipeline steel designed by non-molybdenum C-Mn-Cr-Nb alloy system, which replaces the high-molybdenum C-Mn-Mo-Nb alloy system, was adopted along with acicular ferrite microstructure. The microstructure of X70 strip is homogeneous and ferrite grains are fine, resulting in high strength, excellent low-temperature toughness and weldability.