EFFECT OF FILLER METALS ON THE MECHANICAL PROPERTIES OF DISSIMILAR WELDING OF STAINLESS STEEL 316L AND CARBON STEEL A516 GR 70

2015 ◽  
Vol 75 (7) ◽  
Author(s):  
Abdollah Bahador ◽  
Esah Hamzah ◽  
Mohd Fauzi Mamat
Keyword(s):  
Tensile Strength ◽  
Stainless Steel ◽  
Carbon Steel ◽  
Weld Metal ◽  
Dissimilar Welding ◽  
Hardness Profile ◽  
Base Metals ◽  
Stainless Steel 316L ◽  
Sharp Drop ◽  
Filler Metals

This paper describes an investigation on the effect of using three different filler metals to weld two dissimilar metals namely, stainless steel 316L and low alloy carbon steel A516 gr 70. Manual Gas Tungsten Arc welding (GTAW) with three filler metals including ER 80S-Ni1, ER309L, ER NiCrMo-3 were selected to weld the two metals. Radiography and penetrant tests were performed on the welded metals to ensure the surface and internal soundness of the welds based on the tensile tests results, all the specimens failed at the carbon steel A516 gr 70 base metals with fully ductile fracture mode (cup and cone). Welded samples using Inconel 615 filler metal has the highest strength of 512 MPa while other samples show almost similar strength of 481 and 487 MPa. The tensile strength of all the welded samples is found to be in between the tensile strength of the base metals. Micro-hardness test showed that ER80S-Ni1weld has the highest hardness, meanwhile hardness profile of ER309L presented a sharp drop in the stainless steel side and ER NiCrMo-3 weld metal illustrated hardness above the two base metals with fewer variations across the weld metal.

Dissimilar Welding between AISI 304 Stainless Steel and AISI 1020 Carbon Steel Plates

2012 ◽  
Vol 268-270 ◽  
pp. 283-290 ◽  
Author(s):  
Wichan Chuaiphan ◽  
Chandra Ambhorn Somrerk ◽  
Satian Niltawach ◽  
Banleng Sornil
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Weld Metal ◽  
Steel Plates ◽  
304 Stainless Steel ◽  
Dissimilar Welding ◽  
Austenite Matrix ◽  
Delta Ferrite ◽  
Weld Metals ◽  
Steel Base

Abstract. This work studied the feasibility of dissimilar welding between AISI 304 stainless steel and AISI 1020 carbon steel plates with the thickness of 15 mm. The processes applied in this work were gas tungsten arc welding (GTAW) and shield metal arc welding (SMAW). Microstructure of weld metal produced by GTAW consists of delta ferrite network in austenite matrix, while the dendrite of delta ferrite finely distributed in austenite matrix was found in the weld produced by SMAW. Hardness values of weld metals produced using these two techniques were superior to those of stainless steel and carbon steel base metals respectively. Weld metals produced by these two processes were qualified under tension and bending. This was justified by the result that the failed part after transverse tensile test was on carbon steel, and no crack was found in weld metal after U-shape bending. Impact test exhibited higher toughness of weld metal produced by GTAW than that produced by SMAW. This might be from microstructure of the former weld as network of delta ferrite in austenite matrix which might help absorb impact energy. Pitting corrosion potential of weld metal produced by GTAW was higher than that produced by SMAW and stainless steel base metal respectively. In the aspect of mechanical and corrosion properties of the weld, GTAW was considered as a promising process that could be used for dissimilar welding between these two metals.

scholarly journals Influences of Groove Angles and Filler Metals on 304L Stainless Steel to AISI 1040 Carbon Steel Dissimilar Joint by Gas Tungsten Arc Welding

2019 ◽  
Vol 130 ◽  
pp. 01008
Author(s):  
Eriek Wahyu Restu Widodo ◽  
Vuri Ayu Setyowati ◽  
Suheni ◽  
Ahmad Rilo Hardianto
Keyword(s):  
Tensile Strength ◽  
Stainless Steel ◽  
Carbon Steel ◽  
Pressure Vessel ◽  
Arc Welding ◽  
Filler Metal ◽  
Gas Tungsten Arc Welding ◽  
304L Stainless Steel ◽  
Gas Tungsten Arc ◽  
Filler Metals

Dissimilar joint commonly applied on pressure vessel application in power plan field as joining between the tank and the stanchion of pressure vessel. This paper presents the investigations carried out to study the influence of groove angles and filler metals on 304L Stainless Steel to AISI 1040 Carbon Steel dissimilar joints. Gas Tungsten Arc Welding with 120 A of current was used on this research, joined the two different metals. The 30°, 45°, and 60° were used in this welding as parameters of V-groove angles. ER 308L-16 filler metal of stainless steel and ER 70S-6 filler metal of carbon steel were used as filler metals. Tensile test was conducted to obtain tensile strength of joint and to analysis of the effect of the welding parameters to the mechanical properties. The highest tensile strength was obtained from the 60° groove angle using ER 308L-16 filler metal of 614.54 MPa. In the other hand, 45° groove angle using ER 70S-6 filler metal obtained the lowest tensile strength of 578.66 MPa. The joining process of dissimilar welding using ER 308L-16 filler metal, filler metal for stainless steel, has obtained the highest tensile strength with wider groove angle as well.

Effect of Filler Alloy on Microstructure, Mechanical and Corrosion Behaviour of Dissimilar Weldment between Aisi 201 Stainless Steel and Low Carbon Steel Sheets Produced by a Gas Tungsten Arc Welding

2012 ◽  
Vol 581-582 ◽  
pp. 808-816 ◽  
Author(s):  
Chuaiphan Wichan ◽  
Srijaroenpramong Loeshpahn
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Weld Metal ◽  
Base Metal ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Delta Ferrite ◽  
Steel Sheets ◽  
Gas Tungsten Arc ◽  
Weld Metals

The joining of austenitic stainless steel (AISI 201) to low carbon steel sheets (CS) was attempted by gas tungsten arc welding (GTAW) with four types of consumables. The studied consumables were ER308L, ER309L, ER316L stainless steel wires, and AWS A5.18 carbon steel wire. The welding parameters – i.e. the current of 90 A and the welding speed of 62 mm.min-1 – were fixed in all welding operations. The microstructure of weld metal produced by stainless steel consumables consisted of delta ferrite in austenite matrix. The delta ferrite in the form of continuous dendrite was observed in weld metals produced by 308L and 309L fillers. The dendrite of delta ferrite was relatively discontinuous in weld metal produced by 316L filler. The microstructure of weld metal produced by carbon steel filler consisted of equiaxed ferrite and pearlite, similar to that of carbon steel. The corrosion behavior of weld metal was investigated by potentiodynamic method. Specimens were tested in 0.35-wt% NaCl solution saturated by laboratory air at 27°C. It was found that the corrosion potential of weld metal produced by carbon steel filler was considerably lower than those of AISI 201 base metal and weld metals welded using stainless steel consumables. Weld metals produced by stainless steel fillers –308L,309L and316L– exhibited the similar corrosion potentials as that of 201 base metal. The pitting potentials of weld metals produced by 309L, 316L fillers were higher than those of 201 base metal and weld metal produced by 308L filler respectively. It was discussed that the increase of Cr content in weld metals by using 309L filler contained with 24.791 wt% of Cr, or the addition of Cr and Mo in weld metals by using 316L filler contained with 21.347 wt% of Cr and 2 wt% of Mo, promoted the pitting corrosion resistance of weld metal to be comparable with that of Fe-17Cr-3Ni (201) base metal. An emission spectroscopy was applied to quantify the amount of elements in weld metals. By considering the contents of Cr and Mo, the pitting resistance equivalent number (PREN) of each weld metal was calculated. The discussion of the corrosion resistance of weld metals related to PREN and microstructure was made in the paper.

scholarly journals Effect of Spot-Welding Current-Cycle for Medium Carbon Steel And Stainless Steel on Mechanical Properties

2018 ◽  
Vol 7 (4.37) ◽  
pp. 214
Author(s):  
Nawzad J.Mahmod ◽  
Aysha Sh. Hasan ◽  
Ahmed A.Hussein ◽  
Obed M. Ali
Keyword(s):  
Tensile Strength ◽  
Stainless Steel ◽  
Carbon Steel ◽  
Spot Welding ◽  
Welding Current ◽  
Electrical Current ◽  
Medium Carbon Steel ◽  
Maximum Heat ◽  
Medium Carbon ◽  
Spot Diameter

Spot welding involves the joining of two or more plate metals in localized areas where melting and jointure of a little volume of fabric happens from heating caused by resistance to the passage of an electrical current. This process is typically used for obtaining a lap joint of plate metal parts. In this work, stainless steels and medium carbon steel were used. Three rules for welding set-up, lowest tap on the fastening electrical device, highest % current setting on the weld management and shortest weld time setting on the weld management were adopted. Experiments conducted to show the effect of these variables on the welding diameter and tensile strength for each sample for medium carbon steel and stainless steel separately and joining both metals together by spot welding. The results show that the utmost durability was at stainless steel specimens and minimum tensile strength was at medium carbon steel specimens. Furthermore, the obtained results showed that the maximum heat generated was at stainless steel specimens and minimum heat generated values was at medium carbon steel specimens for all current dependent in this work. Meanwhile, slight effect of heat generated on the spot diameter for the current of 10.6 & 5.3 kA, and so significant effect on the spot diameter for the last current (2.3kA).   

Failure Analysis of Duplex Stainless Steel in an Atmospheric Tower

2018 ◽  
Author(s):  
Chengsi Zheng ◽  
Gang Wang ◽  
Xiang Wu ◽  
Zhibin Ai
Keyword(s):  
Stainless Steel ◽  
Chemical Composition ◽  
Carbon Steel ◽  
Weld Metal ◽  
Duplex Stainless Steel ◽  
Statistical Data ◽  
Welding Parameters ◽  
Physical Metallurgy ◽  
Σ Phase ◽  
Formation Of Cracks

An atmospheric tower head, manufactured using a clad plate of carbon steel + 2205 duplex stainless steel (DSS), was reported to show clear cracks in the DSS layer after serving for four years at an atmospheric distillation unit of a refinery. The cracks propagated in a dendritic manner within the heat-affected zone (HAZ) and the weld metal, accompanying locations with a higher hardness than that of locations without cracks. Some nondestructive methods were used to analyze the chemical composition, microstructure, hardness of the base metal, HAZ and weld metal. An analysis based on these results and the statistical data of an HCl-H2S-H2O corrosion environment was proposed to explain the formation of cracks from the viewpoint of physical metallurgy. The analysis showed that there were conditions favorable for the precipitation of the sigma (σ) phase in the DSS layer during the manufacturing process of the head, resulting in the occurrence of stress corrosion cracking (SCC) in the DSS layer under the harsh HCl-H2S-H2O environment. Moreover, some solutions, i.e., the enhancement of anticorrosion measures, the optimized microstructure of the DSS, and modified welding parameters were recommended to avoid a similar failure.

Case Studies on Field Repairs of Stainless Steel Components in Refinery

2013 ◽  
Vol 794 ◽  
pp. 375-379
Author(s):  
B.S. Negi
Keyword(s):  
Stainless Steel ◽  
Heat Exchanger ◽  
Carbon Steel ◽  
Case Studies ◽  
Weld Joint ◽  
Stainless Steels ◽  
Pressure Vessels ◽  
Dissimilar Welding ◽  
Premature Failure ◽  
Steel Type

Stainless steels (SS) possess excellent corrosion, creep and high temperature oxidation resistance and are invariably used in refinery for construction of heater tubes, tube supports, Heat exchanger bundles, piping and internal lining of pressure vessels. Ferritic stainless steel type 405 is used for column strip-lining, martensitic stainless steel type 410 is used for column trays and heater tubes and austenitic stainless steel family is used very extensively for lining, piping, heat exchanger, heater tubes and tube supports. On-stream and turnaround condition monitoring of plant and equipment are carried out for health assessment and mitigation of premature failure. However, catastrophic failures of stainless steel due to stress corrosion cracking, thermal fatigue and stress relaxation cracking are encountered in addition to bulging and cracking of strip-lining. Field repairs of these components are required to be done. Stainless steels are difficult to weld due to low thermal conductivity, higher coefficient of thermal expansion, fissuring and solidification cracking problem during welding. Lower heat input and fast cooling facilitate the welding process. Welding of service exposed stainless steels is more challenging, as it has already undergone metallurgical degradation. Welding of stainless steels is carried out using TIG and SMAW process with matching electrode after establishing the welding specification procedures and welders qualification. Field repairs of stainless steels components are also attempted with original procedures and in case of difficulties, a buttering layer of inconel (ERNiCr3) or ER 309Mo is provided on the welding surface before using matching electrodes. Quality assurance of weld joint is ensured by stage-wise inspection and non-destructive testing. Dye penetrant test of root run and radiographic examination of final weld joint are most common. Post weld heat treatment is done as per code requirement. This Paper highlights three case studies on field repairs of stainless steel components in refinery. 1. Welding procedure followed for repair of bulged and cracked SS 316 strip-lining and cladding on carbon steel backing material. It is a dissimilar welding of SS 316L with degraded carbon steel. 2. Field welding of SS 347 Piping components, which has undergone thermal relaxation cracking at fillet joints. 3. Welding repair of SS 310 cast heater tube support conforming to A 297 Gr HK 40. The Paper also presents brief failure analysis with reasons and remedies.

Sign in / Sign up

Export Citation Format

Share Document