New X70-X80 HSLA steels for structural and line pipe use

Journal Article · Mon Aug 01 04:00:00 EDT 1977 · J. Met.; (United States)

DOI:https://doi.org/10.1007/BF03354327· OSTI ID:6517938

Goetz, G J

Commercial HSLA steel plates for structural and line pipe applications can be produced by using V and V-Nb microalloyed ferrite-pearlite steels. A V steel containing either 0.07/0.09% C, 1.60/1.75% Mn or 0.10/0.12% C, 1.40/1.55% Mn with 0.09/0.15% V and 0.014/0.022% N is suitable for applications in control-rolled /sup 1///sub 2/ inch (13 mm) plate. A control-rolled V Nb steel containing either 0.07/0.09% C, 1.60/1.75% Mn or 0.10/0.12% C, 1.40/1.55% Mn and microalloyed with 0.09/0.15% V and 0.02% Nb is ideal for /sup 1///sub 2/ inch and 0.72 inch applications requiring superior toughness. The Nb steel is a strong candidate for Arctic-grade line pipe applications. Commercial trials by a pipe producer have been successful, exceeding specifications for strength, toughness and weldability of mainline pipe. Vanadium microalloying (to 0.15%), either alone or in combination with added nitrogen and/or niobium, increases yield strength with little or no loss in toughness when low temperature control-rolling practices are applied. Vanadium strengthening without embrittlement is well documented and may be due to vanadium carbonitride precipitation at dislocations rather than within the ferrite matrix.

• OSTI ID: 6517938
• Journal Information: J. Met.; (United States), Journal Name: J. Met.; (United States) Vol. 29:8; ISSN JOMTA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400 -- Petroleum-- Processing
36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CARBON ADDITIONS
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
METALS
NICKEL ADDITIONS
NICKEL ALLOYS
NIOBIUM
NIOBIUM ADDITIONS
NIOBIUM ALLOYS
PETROLEUM
PIPELINES
REFRACTORY METALS
STEELS
TENSILE PROPERTIES
TRANSITION ELEMENTS
VANADIUM
VANADIUM ADDITIONS
VANADIUM ALLOYS
WELDABILITY
YIELD STRENGTH