Residual Elements Have Significant Effects on the Elevated-Temperature Properties of Austenitic Stainless Steel Welds
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
The influence of various residual elements on the elevated-temperature properties of austenitic stainless steel welds has been investigated at the Oak Ridge National Laboratory (ORNL). Included in this investigation are the effects of B, P, Ti, C, S, and Si. This work is aimed at developing austenitic stainless steel weld materials with enhanced elevated-temperature properties. The materials investigated in this program include types 308, 316, and 16-8-2 stainless steel weld metals. Processes investigated include shielded metal-arc (SMA), gas tungsten-arc (GTA), and submerged-arc (SA) welding. Early work was done with type 308 and 316 SMA weld metals, where the greatest enhancement of properties resulted from controlled additions of boron, phosphorus, and titanium to the deposits. Significant improvements in the properties of GTA and SA welds also result from the addition of these residual elements. The optimum residual element compositions were determined to be nominally 0.05% Ti, 0.04% P, and 0.006% B for SMA welds and 0.5% Ti, 0.04% P, and 0.006% B for GTA welds. Submerged-arc welds with 0.2% Ti have exhibited improved creep strengths.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-00OR22725; W-7405-ENG-26
- OSTI ID:
- 5258240
- Report Number(s):
- ORNL/TM--6177
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360101* -- Metals & Alloys-- Preparation & Fabrication
360102 -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
ARC WELDING
AUSTENITE
BORON ADDITIONS
BORON ALLOYS
CARBON ADDITIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CRACKS
CREEP
CRYSTAL-PHASE TRANSFORMATIONS
FABRICATION
GAS TUNGSTEN-ARC WELDING
HEAT RESISTING ALLOYS
HIGH TEMPERATURE
IMPURITIES
IRON ALLOYS
IRON BASE ALLOYS
JOINING
JOINTS
MECHANICAL PROPERTIES
MOLYBDENUM ALLOYS
NICKEL ALLOYS
PHASE TRANSFORMATIONS
PHOSPHORUS ADDITIONS
SHIELDED METAL-ARC WELDING
SILICON ADDITIONS
SILICON ALLOYS
STAINLESS STEEL-16-8-2
STAINLESS STEEL-308
STAINLESS STEEL-316
STAINLESS STEELS
STEELS
SULFUR ADDITIONS
TITANIUM ADDITIONS
TITANIUM ALLOYS
VERY HIGH TEMPERATURE
WELDED JOINTS
WELDING