Welders use the fillet weld (pronounced "fill-it") to make lap joints, corner joints and T joints. with highly restrained CJP welds, they sometimes con-tributed to cracking during fabrication (Tide, 2000). contour symbol A supplementary symbol that tells the welder the shape of the finished weld bead. [305 mm] length of weld. 2 . CFW - Continuous Fillet Weld. t. 1. Given the operational requirement that a static load factor of 1. A weld applied to a surface, as opposed to making a joint, to obtain desired properties or dimensions. The. 1 Where double continuous fillet welding is proposed the throat thickness is to be in accordance with Vol 1, Pt 6, Ch 6, 5. A few examples include T-joints, which require a fillet weld; butt joints requiring a groove weld; lap joints, which require fillet welds; and corner joints, which can be fillet or groove welds. Fig. Note that all fillet welds are assumed to be continuous unless noted otherwise. use intermittent welding in preference to a continuous weld pass. Non-fusion joining methods like soldering, braze welding, and brazing use fillets welds. The size for one side continuous weld is to be of fillet required by [2. Use the gas metal arc welding process. Tech b says that when destructively testing a fillet weld, a s,all void is. Dr. Intermittent fillet welds and zig-zag fillet welds are types of fillet welds that are used in certain situations where a continuous fillet weld is not practical or possible. Because of this, stitch welds are not as strong as full welds and are. The requirement is contained in note 7 of figure 3. Fillet welds that are to be welded approximately flat, convex, or concave faced without recourse to any method of finishing must be shown by adding the. of undercut (depth) for 2 in. Weld size - With the ISO system, the weld size is placed to the left of the weld symbol and is preceded by the letters: (z) / (a) / or (z) - depending on whether the leg length or throat thickness is to be specified. A staggered weld is simply designed as a fillet weld with a hit and miss so you would call it as 6" on 6" off or as required for the particular fillet weld. The continuous welding was firstly applied for all butt welds and fillet welds to obtain the uniform weld seam, as shown in Fig. Four times the weld size d. It also means less filler metal is used, which saves money, and the weld is usually completed in less time than if it was continuous. A fillet weld joins together two pieces of metal that are perpendicular or at an angle. 65. Also, in contrast to groove welds, fillet welds are often specified as intermittent welds, meaning they are not continuous welds. This is because there is a reduced throat dimension due to joint geometry for included angles above 100 degrees and a “Z-loss” dimension, which depends on the welding process used, for angles. In a built-up I-shaped cross-section, how are welds connecting the plates designed? Assuming that continuous fillet welds are used, the welds may be minimum size per the 2005 AISC Specification Table J2. A common example where the required fillet weld size is not limited by geometry and must be specified. The submerged arc welding needs a continuous feed of consumable wire electrodes along with a continuous supply of the flux powder. Question: Consider the structure shown below. min. when a 3/16" continuous fillet weld will do. Compound welds. A seal weld is typically a full-penetration weld or a full-fillet weld that completely fills the joint, creating a continuous, smooth surface. Ansys Mechanical has a distinct advantage permitting parametric design of welded structures. 5. 2 Defects in arc welding. The note in the tail, "2 places", would indicate there are two identical joints that require the same extent, type, and size of intermittent weld. In contrast, a fillet weld is a type of weld that is used to join two pieces of metal together at a right angle. gives the maximum and minimum fillet weld size, which are acontinuous or intermittent fillet or partial penetration welds, provided the requirements of (1) through (4) be-low are met. A selected face cannot form a continuous chain with another selected face. 6 mm]. 5(a) shows dimensions applied to continuous fillet welds, (b) shows dimensions applied to intermittent fillet welds, and (c) shows. Longitudinal, transversal, and continuous (three sides) fillet welds are normally used in lap joints [4]. The lifting strap carries a load of 220kN at a distance. continuous fillet weld on two sides of the weld block fin. 9. Arc welding is taking two or more separate pieces of metal and joining them into one continuous or homogeneous section. Fillet welding, deep fusion welding, and full penetration welding are the three most common forms of continuous fillet welds, with the type of bevel opening depending on the specific process, such as plate thickness, welding method, etc. 4 (fillet welds) if the member is subjected only to axial compression or tension. T/F?, Welding failures always occur in the fusion zone of the weld joint, since this is the part of the joint that has been melted. place welds about the neutral axis. The power source in a particular welding setup is capable of generating 3500 W that can be transferred to the work surface with an efficiency f 1 = 0. Your max. The power source in a particular welding setup generates 3500W that can be transferred to the work surface with a heat transfer factor = 0. connection. 4) Force per unit length of weld acting normal to a leg of a fillet weld. The weld is referred to as “all-around,” indicating that the weld on the joint remains continuous until it joins to itself. Fillet welds are the most common connection in welded fabrication, but also the most difficult to weld with consistency. Fillet welding is the process of joining two metals together in a perpendicular position, leaving a T-shaped result. automatic welding processes. 3 Reinforcing Fillet Welds. A 6mm fillet weld refers to a specific aspect of a tool in fillet welding. See the Design Guide 21 for a discussion on single-sided fillet welds. A fillet weld is a weld that joins two surfaces at an approximate right angle to each other. 21, in the case of continuous fillet welds, using higher degree external constraints could considerably reduce the final distortion by increasing plastic strain and reducing the remaining elastic strains. In butt welding, this defect easily occurs on the bottom of grooves. 50. Fillet welds can be made using various welding processes, including. The welding symbol looks fine. 6. Load applied to a welded bracket or connection. that is a weld that is not in compliance with the symbol Underrun in my AWS D1. Proposed Spline Model. The alternative to the butt weld, fillet welds join two overlapping pieces (lap joint) or two pieces placed perpendicularly to each other (e. The standard machine can be set up for continuous or intermittent fillet welds on stiffeners with flange widths of 0 – 12″ (0- 300 mm) and heights of 3″-16″ (75 mm – 400 mm). If the length dimension is not used, the fillet weld will extend the full length of the weld joint. 6 inches) thick; (d) for welding lining material, geomembranes, pond liners, lagoons, etc; (e) for a fillet weld; and (f) for producing a corner weld. To create a wider bead on thicker material, manipulate the electrode from side to side, creating a continuous series of partially overlapping circles in a ‘Z,’ semi-circle or stutter. 4. 层状撕裂 Lamellar Tear. Yee, Paterson, and Egan (1998) performed finite element analy-ses comparing fillet-welded and CJP-welded continuity plates including heat input of the weld passes. (300 mm) above the upper beam flange to 12 in. (c) Easy fit-up without tight tolerances. It is commonly used for corner joints, T-joints, and lap joints. The welding velocity is 4 mm/sec. Theactual calculated decimal valuewas rounded up to the nearest 1/16 in. However, many steelwork contractors prefer to switch to partial penetration butt welds with superimposed fillets, or full penetration butt welds, rather than use fillet welds larger than 12 mm. Fillet welds are having a more or less triangular appearance that you can notice in a fillet weld cross-section sketch or fillet weld macro test. g. If there are. There are also other permanent joining techniques besides welding that use filled welds. While fillet welds have been emphasized here, the same prin-ciples apply to partial-joint-pene- The metal to be welded is low carbon steel, whose melting temperature is 1760K. b) The size ofthe deep penetration welds (or precesses other than manual metal arc, has been left to the discretion ofthe deslgner-c) The allowable stresles in welda have been increased to bring them in line with thOle for parent meta) given in IS: 800-1962-. When welds. In assembly of the joint before welding, the pipe or tube shall be inserted into the socket to the maximum depth and then withdrawn approximately 1/16" (1. The process feeds a continuous wire via a contact tip, where it makes electrical contact with the power from the rectifier, into the weld area, where it arcs and forms a molten pool. RO Rough. A continuous fillet weld is to be made with a cross-sectional area = 0. Welds are not watertight Seam/Fillet Welding. Fillet welded lap joint. A fillet weld or double fillet weld is represented by one or two right-angled triangles with the hypothenuse facing to the right. 5. 4 ). 3. weld is part of a 3-on-6 intermittent fillet weld. The effective weld thickness a of a fillet weld should be taken as the height of the largest triangle. The weld size need not exceed the thickness of the thinner part joined. A fillet weld is a triangular seam weld that joins two surfaces at right angles to each other and butt welds. Compare these two symbols. 8. CFW - Continuous Fillet Weld. Learn how to read and interpret fillet weld symbols on metal fab drawings. Welding Symbols on blueprints. This article explains the common joint designs,. Continuous fillet welds are the usual choice for most small and medium sized beams with flanges up to 17 mm thick. A 2 inch weld on the print that's only 1/2 inch long on the material. 6. 第三种选择没有在上图中显示,当然就是全面角焊缝了。. slab thickness - 3000 psi min. 95 and melting factor. 4. 船形焊fillet welding in the flat position. 4. Fillet welds are known for their strength and versatility, as they can join different types of metals and withstand heavy loads and stress. For continuous full penetration butt weld in shear use. CE 47005: Design of Steel Structures – Prof. The following images show cosmetic, fillet, and intermittent fillet welds. You can have different sizes of fillet welds, starting from 4-5 mm, depending on the load capacity. Study with Quizlet and memorize flashcards containing terms like The purpose of a _____ _____ is to join parts together so that the stresses are distributed, The faying surface can be shaped before welding to increase the welds strength; this is called _____ _____, It is easier for a crack to propagate through a continuous weld than it is on an _____ weld. continuous or intermittent fillet or partial penetration welds, provided the requirements of (1) through (4) be-low are met. “Weld effective length” formulae are evaluated in conjunction with EN 1993-1-8 (directional and simplified methods) according to the standard procedure of EN 1990. These fillet welds could be continuous or intermittent, if intermittent they can also be staggered. Ultrasonic Testing or UT of Weld is an efficient and reliable volumetric non-destructive testing method. (b) Minimum edge preparation. Create weld bead features in weldments. A minimum nominal ‘t’ of 6 mm (1/4″) [14. Fillet welds are the most common connection in welded fabrication, but also the most difficult to weld with consistency. It NEVER gets mirrored if it is not designated as a triangle (fillet weld symbol) on BOTH sides of the line. For nonfrangible roofs, alternate details are permitted. Determine the travel speed at which the welding operation can be accomplished? Applications of dimensions to different types of fillet welds are given in Table 26. The melting factor in the operation is 0. you have to alternate the weld and length of continuous weld should preferably kept 40times weld size,the weld. Fillet welds are very common and are used for a variety of connections. In a built-up I-shaped cross-section, how are welds connecting the plates designed? 4. When a connection with end fillet is loaded in tension, the weld develops high strength and the stress developed in the weld is equal to the value of the. The metal to be welded is low carbon steel, whose melting temperature, is 1760K. 层状撕裂 Lamellar Tear. 2 refers to a horizontal position – either 2F or 2G. Master your weaving skills & weaving techniques. In a weldment assembly, use commands on the Weld tab to create fillet welds, groove welds, and cosmetic welds. b. Learn how to read and interpret fillet weld symbols on metal fab drawings. The 30mm square arm is connected to the flange plate via continuous fillet weld. It may be a chain or a intermittent but if it is called out. 1) The features of fillet welds are: (a) Economically attractive up to 12-16 mm leg size. When the overall weld length is reduced, this. Butt welds are not combined by their. 2 The impact area referred to in Pt 7, Ch 2, 4. Instead of creating a continuous weld, intermittent fillet welds are spaced apart, leaving gaps between each weld. the interruption of welds which occur on opposite sides of a common plane, and under these conditions, the welds are required to be interrupted at the corner (Figure 1). Compared to Radiographic testing-RT (other volumetric NDT method),. this arrangement is normally as per agreement between contractor and the owner. 49mm/se c) 3. Unless otherwise instructed, it is usually the leg length that is specified, in which case only the (z) box needs to be added. A continuous fillet weld is to be made with a cross-sectional area of 20 mm2. 插销试验Implant Test. 7. You can click links on the left to see detailed. tack weld. 707*Thickness of Plate. Assume the melting factor = 0. Ng A K F, Driver R G, Grodin G Y. 1 FILLET WELDS (SEE FIGURE 7. 2 lbf/ft2)] exclusive of any corrosion allowance (CA). The reference line denotes the joint line of the fused two work pieces. To pass visual inspection of a fillet weld, what is the maximum allowable width if the weld? 10 mm (3/8"). 2 The impact area referred to in Pt 6, Ch 2, 4. Butt joint: With butt joint welding, pieces of the same thickness meet end to end to form a single flat sheet. If 10% of heat is dissipated by conduction heat loss, and a continuous fillet weld is to be made. The flange plate is attached to the rear backboard by means of 4 has of M8 black bolts arranged as shown. While fillet welds have been emphasized here, the same prin-ciples apply to partial-joint-pene-16 Types of welds 1) Fillet weld Fillet weld on corner joint Fillet weld on lap joint Fillet weld on T-joint ; 17. Based on principal stresses extracted at the weld terminations, it wasThis is a requirement of the IBC for special inspections. Note! Note: Weld symbols on the full reference line relates to welds on the arrow side of the plate being welded. A 6mm fillet weld refers to a specific aspect of a tool in fillet welding. A fillet weld is to be made with a crosssectional area = 22. 1-800-752-0333. Based on weld shape, Weld Fillets are classified into three types: Convex Fillet Weld. SURFACE CONTOUR OF FILLET WELDS. Butt welding from one side will only be permitted for specific applications with an approved welding procedure specification. 14. Butt Weld vs Fillet Weld The main difference between a butt and a fillet weld is the angle between the joining workpieces. Fillet weld Fillet weld 1 Welds are almost always continuous fillet welds all round both sides of the stiffener. Table 26. The fillet weld and the butt joint weld are the only two fundamental kinds of continuous welds. Fillet welds are having a more or less triangular appearance that you can notice in a fillet weld cross-section sketch or fillet weld macro test. If the surfaces are perpendicular (with an angle of 90°), then they are usually joined with a fillet weld. A fillet weld is a common weld type when the joint has two members of 90 degrees or more. 65mm/sec d) 4. A continuous fillet weld is to be made with a cross-sectional area= 20mm2. The melted metal formed a nugget that had a. 25. a 1/4" continuous fillet weld on two sides of the weld block installation guideline: when attaching directly to steel make sure the steel is 3/8" thick min. Fillets are the most common type of weld performed. 5. 6 and an additional factor of 2 is necessary to allow for vertical dynamic action. 6. Fillet welds are generally performed on a 90 degree joint of 2 perpendicular pieces of metal. A number is used to define the position, and an F for Fillet or G for groove refers to the type of weld. Assuming the smaller continuous fillet weld meets the requirements of AWS D1. weld has undercut and the undercut is 1/16 in. Shiozaki et al. 9 and melting factor = 0. There are three main types of fillet welds, these are; Full fillet weld: This is where the weld's size is the same as the thickness of the thinner metal being joined. a bracket is welded to a base using a continuous fillet weld Then a lifting strap was welded to the bracket, using two fillet welds. specifications for the continuous fillet welds joining flanges and webs called for a 5/ 16 inch leg size for flanges up to 1 1/4 inch and 3/8 inch leg size for flanges. The metal to be welded is low carbon steel, whose melting temperature is 1760K. An intermittent weld is where you make a weld for two, three, or four inches, skip a the same distance you welded and then weld again or skip to the middle of your joint and weld. 8. [qallow=370 kN/m] 구 Area Depth d Web Flange Flange thickness with thickness 1 Designation S 1, s, 104 mm mm mm mm mm. , it’s tough to comment further. 1: “The thermal cutting of structural steelThe American Welding Society (AWS) defines slag as “a nonmetallic byproduct of the mutualdissolution of flux with nonmetallic impurities in welding and brazing processes. Laser Beam Welding (LBW) is a welding process in which heat is formed by a high-energy laser beam targeted on the workpiece. 2. Since the run's shape is dictated largely by the joined components, the only means of varying the load capacity for a given electrode material is to vary the size w. Fillet welding with dual sides. ) can be calculated from the beam shear Vu as VuQ/I and the weld sized to provide for. 1 for conditions like airor liquid-tight sealing, hot-dip galvanizing, or sanitary washdown service conditions. A weld all around would mean the weld is continuous, no interruptions in the continuous weld, and everything is accessible to be welded. 6. 11. continuous. A fillet weld is type of weld that has a roughly triangular cross section. Jenis besi. The second number, separated from the first by a “-”, refers to the pitch. Determine the travel speed at. The fillet weld in the cruciform, T, corner and lap joint is superior to the butt weld in respect of residual stresses and distortion (not so in respect of fatigue strength). BRITISH STANDARD BS EN 22553:1995 ISO 2553:1992 Welded, brazed and soldered joints — Licensed Copy: :FULLNAME, : DATE, Uncontrolled Copy, (c) BSI Symbolic representation on drawings The European Standard EN 22553:1995 has the status of a British Standard UDC 621. minimise the amount of weld metal. The measure of the smallest dimension of a solid figure: a board of two. A weld produced by joining a metal stud or similar part to a member. Butt joint: With butt joint welding, pieces of the same thickness meet end to end to form a single flat sheet. The all-around (Peripheral Welds) welding symbol is used for continuous welds made at the. Fillets are the most common type of weld performed. 3) The power source in an arc-welding operation on titanium generates 250 Btu/min, which is transferred to the work surface with heat transfer factor = 0. fillet weld profile with adequate base metal penetration and root fusion. Staggered intermittent fillet weld:Fillet welding carriage for Stitch/Continuous. Transverse non-load-carrying fillet weld joints The basis of experimental data for the NLC transverse attachment joints with the continuous SSFW and DSFW joints is extracted from the earlier experimental studies (Ahola et al. 6. This is an issue that arises when seal welds must. Determine the travel speed at which the welding operation can be accomplished. 1 General. A continuous fillet weld is to be made with a cross-sectional area=20mm2. 6 h/m 10mm 0. Weld is then shaped using an abrasive pad. Eight times the weld size 7 In addition to the above limitation, what is the minimum length for intermittent fillet welds? a. • Structural welding is a process by which the parts that are to be connected are heated and fused, with supplementary molten metal at the joint. 32 SECTION FIVEFIGURE 5 and discover magazines on Yumpu. By Joseph P. The usual visual inspection of fillet welds and longitudinal groove welds and the nondestructive inspectionMenurut literatur dari TWI, sambungan dasar pengelasan itu ada 3 jenis yaitu Fillet Joint, Butt Joint dan Compound Weld Joint (Gabungan fillet dan butt joint). c. 2 Directional method. fillet welds is considered as shear stress regardless of the direction of the application. Ft = 0. slot weld: A weld made in an elongated hole in one of the two lapped members of a joint. For frangible roofs, roof plates shall be attached to the top angle of a tank with a continuous fillet weld on the top side only. Expansion gap. 3 Design Resistance of fillet welds. 1. The simulated crack growth path. The Basic ISO Weld Symbol. A continuous fillet weld is to be made with a cross-sectional areas of 20 mm2. P6. 33 *10-6) a) 59. The same goes for multi pass fillet welds too. Other seams are bead and burr seams. continuous = tpi is full time stationed at fabrication or erection site. The metal to be welded is low carbon steel, whose melting temperature, is 1760K. 5. 插销试验Implant Test. 7. CS-23 I-Bar Dual Slide Fillet Carriage. 角焊缝. 6. The lifting 220kN at a distance 300 mm from the face. 1 Controlling local buckling 3. I have one guy that is doing overhead stitch welding CS, 1/4 fillet, 7018, 5/32 rod going at a rate of 6. This is a complete penetration butt weld (compound butt weld placed first followed by a fillet weld). (b) butt welds shall be continuous full penetration, category sp. Welding weld welded basic fillet continuous Weld joint and weld typesWeld symbol chart Compare price: weld symbol chartWelding symbols chart welding symbols and their. A fillet weld symbol comprises a reference line, an arrow line, the tail and the weld symbol, including the leg size. Fillet welds account for an overwhelming majority of joints fabricated through arc welding. It is the user’s responsibility to ensure that the supporting structure to which the base plate is attached is capable of withstanding and supporting the base plate’s reported proof loads. 3 Reinforcing Fillet Welds. The base plate must be welded with 5/16” (8 MM) continuous fillet weld all around the four sides of the base plate. -the length & centre-to-centre distance also (known as pitch) of the weld increments are different for each type of fillet weld. The aim of the present study is to. Determine: The maximium weight "H" that can be applied to the 'goal' if a player grabs hold of the hoop at the. This is transferred to the work surface with a heat transfer factor = 0. 04 in2. Socket weld elbow 4. This enhances the structural integrity of the. A fillet weld offers the advantage of requiring no special joint preparation because the geometry of the joint provides the appropriate features to place the weld. In addition, the design strength of the fillet weld (P w) is similar to the butt weld, as it is a function of the weld thickness (t w), the effective length of the weld (l eff), and the maximum permissible shear strength on the weld (f w). 5. The new metal to be welded is unknown but its melting temperature is 1077°C. On fillet welded joints made from both sides, a staggered. Weld beads have continuous uneven shapes. Tech a says that when destructively testing a fillet weld, there must be continuous fusion between the pieces along atleast half of the weld tech b says that when destructively testing a fillet weld, a small void is permissible at the begining of the weld who is right. 0. The following article provides an overview of the design processes and their specific features, especially when using the EN 1993-6. At the end of the reference line there is a tail at the opposite end of the line. 4” (6mm) fillet weld than a continuous 1/ 8” fillet weld when the plates being joined are 3/ 4” (19mm) thick or greater. A fillet weld is a common weld type when the joint has two members of 90 degrees or more. 2 Periodic: The welding inspector is present in the area where the work is being, or has been,The welding is usually continuous fillet welds ranging from . Eccentricity of the applied load. The melting factor in the operation is 0. Although you can apply it at different angles, it would be more prominent at 90 degrees. n. It is a type of welding that creates a fillet-shaped weld, typically used to join two pieces of metal at a 90-degree angle (right angle). In Solid Edge, you select the faces you want to join and if there is a continuous path, SE will run a bead around the joint. 3 mm leg length in order to avoid root failure. 0-94) which defines a “fillet weld leg” as “The distance from the joint root to the toe of the fillet weld. Intermittent fillet welds can be specified as a chain or staggered. 5. These welds are portrayed as a set of two numbers to the right of the triangle instead of just one. weld as defined in the Figure 9 should be twice the element thickness. If the member is subjected to flexure, the shear flow (kips/in. fillet weld on either end of the joint — and to make each segment ¼ in. t. 2, could be used for attaching the stiffeners to plating. When fillet weldscolumn flange interface. long. 9. Researchers have carried out some studies on the fatigue behavior of steel lap joint. Like a bump. Fillet welds account for an overwhelming majority of joints fabricated through arc welding. Miter Fillet Weld. 1, the engineer is likely to be hanging his hat on the welds being continuous around the corner of PJP groove welds, i. A reinforcing fillet weld with a 5⁄Butt welds are a popular welding method used to join two metal pieces such as steel plates along their edges in a single plane. 9. A list of weld defects and their causes is given in Table 11. Continuous laser welding with spatial beam oscillation of dissimilar thin sheet materials (Al-Cu and Cu-Al): Process optimization and characterization. Lap joints are typical welded joints. 4 states the minimum length of an stitch fillet weld. For instance. 05 in 2. The omission of a length dimension, of course, specifies a fillet weld for the full length of the joint. Fillet Weld. They may be used to make T, lap and corner joints ( Fig. Staggered Intermittent Weld: Stich welds are placed on both sides of the joint by offsetting each other weld. A W250x80 steel wide-flange beam is strengthened and stiffened by the addition of 200x10 mm steel plates that are welded to the flanges of the wide flange beam by continuous fillet welds, as shown in the figure. It is usually drawn horizontally and comes with weld-type information. A continuous fillet weld is to be made with a cross sectional area Aw= 20 mm2. The structure has two distinctly different welds groups. e. 1 Where double continuous fillet welding is proposed the throat thickness is to be in accordance with Vol 1, Pt 6, Ch 6, 5. 2 Double continuous fillet welding is to be adopted in the following locations and may be used elsewhere if desired:补焊repair welding. 8. Fig 1: Butt Weld. 5. Intermittent welds are to be doubled at the ends and continued around ends of brackets etc. 4. 5 (addendum March 2000) which states " roof plates shall be attached to the top angle of the tank with a continuous fillet weld on the top side only" You may want to review the tank design if this connection ask for frangible joint (not exceeding 5mm continuous weld). The web-to-flange welds, usually fillet welds, are positioned for welding with maximum efficiency. path concave radius 1000 mm (3. As can be seen in Fig. If a V-groove weld has excessive reinforcement, you. J Manufac Proces. , 75 to 90 degrees for groove welding in & 45 degrees for fillet welding is an ideal torch angle. 4. For example, 6 CFW (continuous fillet weld) achieves around 1 kN/mm, so for 100 kN, you need a 100 mm weld length. [qallow=370 kN/m] I Ares Depth 4 Designation Webs Flange Farge thickness with thickness 1 $. The melting factor in the operation is 0. The melting factor in the operation is 0. The omission of a length dimension, of course, specifies a fillet weld for the full length of the joint. 4. 0 mm 2. You can have different sizes of fillet welds, starting from 4-5 mm, depending on the load capacity. You achieve coalescence, which means to blend or come together. The first number as mentioned earlier refers to the length of the weld.