Microstructure and mechanical properties of gas-shielded welding of C-Mn-Ni steel
- Welding Inst., Cambridge (United Kingdom)
A range of semiautomatic gas-shielded arc welding consumables was selected in order to assess their suitability for producing uphill groove welds in 30-mm (1.2-in.) thick structural steel to BS4360:1986 Grade 50EE. In addition to a 1.2-mm diameter rutile and basic flux cored and metal cored welding wires were employed, all with Ar-20%CO[sub 2] shielding. A 2-mm diameter self-shielded flux cored welding wire was also included. All deposits contained nominally 1% Ni. Constant voltage power sources were used for the rutile and self-shielded electrodes, and synergic pulsed power sources for the remainder. All welding was carried out without preheat, and with a maximum interpass temperature of 150 C (302 F). For all except the self-shielded deposit, the as-deposited microstructure consisted predominantly of fine-grained acicular ferrite. In both the as-welded and stress-relieved conditions, the strength of all welds exceeded the strength requirements of the base plate. Charpy toughness exceeded the plate toughness requirement for the deposits produced with both the solid welding wire and the basic flux cored wire, but not for the metal cored and the self-shielded deposits.
- OSTI ID:
- 6522792
- Journal Information:
- Welding Journal (Miami); (United States), Vol. 72:5; ISSN 0043-2296
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CARBON STEELS
ARC WELDING
WELDED JOINTS
MECHANICAL PROPERTIES
MICROSTRUCTURE
CRACKS
FRACTURE PROPERTIES
NORTH SEA
WELDING RODS
ALLOYS
ATLANTIC OCEAN
CRYSTAL STRUCTURE
FABRICATION
IRON ALLOYS
IRON BASE ALLOYS
JOINING
JOINTS
SEAS
STEELS
SURFACE WATERS
WELDING
360101* - Metals & Alloys- Preparation & Fabrication
360102 - Metals & Alloys- Structure & Phase Studies
360103 - Metals & Alloys- Mechanical Properties