Toughness is the ability of the weldment to absorb energy in the plastic range.
It is one of the material properties studied by Mechanical Metallurgy.
This is the field of metallurgy dealing with the response of metals to external forces.
In particular, in many engineering applications, it is essential that weldments be capable to sustain impact loads without fracturing.
This capacity is assured by constructions exhibiting adequately high fracture toughness.
The subjects relevant to this property are studied with suitable tests and the results are explained and exposed in books and research papers listed hereafter.
The Online Resources listed in this Bulletin_86 offer a wide range of publications presenting essential knowledge on the above matters.
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Toughness (Click Next at the end of each page)
The impact of impact toughness
Simplified Determination of Weldment Toughness
ASTM E2818 - 11
Standard Practice for Determination of Quasistatic Fracture Toughness of Welds
Significance and Use -
Welded-Notch Toughness Testing [download from]
Fracture Toughness of Stainless Steel Welds (Abstract)
Ductility and Toughness of Stainless Steel Welds (9 pages)
New Fluxes of Improved Weld Metal Toughness for HSLA Steels
Microstructure and Impact Toughness of C-Mn Weld Metals (8 pages)
Toughness Properties of Friction Welds in Steels
Fracture Toughness of Electroslag Welded A537G Steel
Influence of Mn and Ni on the Microstructure and Toughness of C-Mn-Ni Weld Metals (1997)(14 pages)
Effect of welding on impact toughness of butt-joints in a titanium alloy (6 pages)
Tackling the toughness of steel pipes produced by high frequency induction welding and heat-treatment
Development of Fracture Toughness Requirements for Weld Metals in Seismic Applications (Abstract)
Effect of weld heat input on toughness and structure of HAZ of a new super-high strength steel
Improving 410NiMo weld metal toughness by PWHT (Abstract)
46 CFR 54.05-17 - Weld toughness test acceptance criteria
The effect of heat input on the weld metal toughness of surface welded joint
Fracture toughness estimation for pipeline girth welds
Riser girth weld toughness - an HAZ microstructure issue
Structural Significance of Local Brittle Zones in Pipeline Girth Welds
Effect of hydrogen and strain rate on superduplex stainless steel weld metal fracture toughness and fracture morphology
Effect of Heat Input on the Weld Metal Toughness of Chromium-Molybdenum Steel
Toughness Testing and ASME B31.3 Process Piping Code
Effect of fracture path on the toughness of weld metal (Abstract)
The effect of vanadium on the microstructure and toughness of weld heat affected zones (7 pages)
The Effect of Vanadium and Niobium on the Properties and Microstructure [...] (10 pages)
Reduction of Toughness Results for Weld Metal 182 [...] (9 pages)
Load path effects on the fracture toughness of alloy 82h and 52 welds in low temperature water (12 pages)
Fracture Toughness Behavior of Weldments with Mis-Matched Properties at Elevated Temperature
Optimizing Weld Integrity for High-Strength Steels
(Presentation - 20 frames)
Position Paper - Pacific Gas & Electric Company’s Line 21E 12” Natural Gas Pipeline (15 pages)
Acceptance Criteria for Reported Cracks and Metal Loss
A critical view of the significance of HAZ toughness testing
Fracture Toughness and Fatigue Crack Growth Study of Friction Stir Welded Plates
High Toughness High Hardness Iron Based PTAW Weld Materials
Fracture Characteristics of Welds in Aluminum Alloys
Weld-hazs toughness and line head properties of tmcp steel
The effect of heat input on the Weld Metal Toughness of surface welded joint
Effects of weld strength undermatch on fracture toughness of HAZ notched weldments in a HSLA steel (Abstract)
Improvement of HAZ Toughness for High Heat Input Welding by Using Boron Diffusion from Weld Metal
Metallurgical Controlling Factors for Toughness of Multi-layered Weld Metal (5 pages)
|Watch the Video
The Big Bang - The facts behind brittle fracture
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