1-20 of 40 Search Results for

interpass temperature

Sort by
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930365
EISBN: 978-1-62708-359-1
... Abstract This appendix provides reference tables listing weldability of cast irons, steels, and nonferrous metals. A process selection table for arc welding carbon steels is included, and recommended preheat and interpass temperature tables are also presented. This appendix includes information...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200369
EISBN: 978-1-62708-354-6
... must be employed. ASTM A217 and ASTM A487 are typical examples. Preheat temperatures so specified are on the low side, based on those preheats normally used in fabrication of pipe assemblies where stresses resulting from weld shrinkage and restraint of the assembly must be considered. Interpass...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.9781627083591
EISBN: 978-1-62708-359-1
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310201
EISBN: 978-1-62708-286-0
... and consequently lower corrosion resistance. Thus, the welds have lower resistance to localized corrosion. This is addressed by using more highly alloyed filler metal or by solution annealing the welds. Restricting heat input to under 16 kJ/mm (400 kJ/in.) and interpass temperature to under 150 °C (300 °F...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820099
EISBN: 978-1-62708-339-3
... are present in both the weld metal and the HAZ ( Ref 2 ). A balanced austenite/ferrite content can be achieved by slowing the cooling rate, through high heat input, preheating in multipass welding operations, and controlled interpass temperatures. The interpass temperature is usually kept between 150 and 200...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200295
EISBN: 978-1-62708-354-6
... welding is not recommended. In fact, low interpass temperature maximums (200-400 °F) are often used. The requirements for post-weld heat treatment are subjects of much debate, many opinions, and little data. This is due to the complexity of corrosion behavior, limited testing of cast alloys...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820001
EISBN: 978-1-62708-339-3
... attributed to high carbon, alloy, or sulfur content. Control of this cracking requires the use of low-hydrogen electrodes, high preheat, sufficient interpass temperature, and greater penetration through the use of higher currents and larger electrodes. The susceptibility of the microstructure to cold...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930217
EISBN: 978-1-62708-359-1
...: Ref 9 Interpass Temperature The interpass temperature, a factor in multipass welds, is the temperature (minimum or maximum as specified) of the deposited weld metal and adjacent base metal before the next pass is started. Usually, a steel that requires preheating to a specified...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930249
EISBN: 978-1-62708-359-1
... welds, interpass temperatures must be maintained at the same level, and it is frequently beneficial to hold this temperature for some time after arc extinction to permit further hydrogen diffusion out of the joint. Postweld tempering is carried out to improve weld-area toughness. For higher-carbon...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930179
EISBN: 978-1-62708-359-1
...-Carbon Steels Steels containing from 0.25 to 0.60% C and 0.25 to 1.65% Mn are classified as medium-carbon steels. Based on their base-metal mechanical properties, the electrodes in AWS specification A5.1 usually suffice in most applications. The use of preheat, interpass temperature...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930189
EISBN: 978-1-62708-359-1
... microgalvanic cells. Preheat and Interpass Temperature The selection and use of proper preheat treatment and interpass temperature may prevent hydrogen cracking in carbon and low-alloy steel. Passivation Treatment A passivation treatment may increase the corrosion resistance of stainless steel...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030096
EISBN: 978-1-62708-282-2
... formed from weld metal δ-ferrite in molybdenum-containing austenitic stainless steels. The δ-ferrite transforms into brittle intermetallic phases, such as σ and χ, at temperatures ranging from 500 to 850 °C (930 to 1560 °F) for σ and 650 to 950 °C (1200 to 1740 °F) for χ. The precipitation rate for σ...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930003
EISBN: 978-1-62708-359-1
... consisting of a partially melted or liquated zone, where the peak temperatures experienced by the weldment fall between the liquidus and the solidus. Fig. 1 Schematic diagram showing the three zones within a weldment It is well established that solidification behavior in the fusion zone...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820125
EISBN: 978-1-62708-339-3
...; thus, some engineering judgment is required. The same concerns that lead to the requirement of relatively low heat input also necessitate maintenance of relatively low interpass temperatures. Maximum interpass temperature recommendations vary between alloys and manufacturers, but maximum temperatures...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820115
EISBN: 978-1-62708-339-3
...). In multipass welds, interpass temperatures must be maintained at the same level, and it is frequently beneficial to hold this temperature for some time after arc extinction to permit further hydrogen diffusion out of the joint. Postweld tempering is carried out to improve weld-area toughness. For higher-carbon...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930353
EISBN: 978-1-62708-359-1
... these tendencies. The specific welding preheat or interpass temperature to be used when welding an assembly depends on both its size and shape and the susceptibility to cracking of the particular alloy. Joining objects of widely differing size can produce uneven heating and cooling because of the ability...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170123
EISBN: 978-1-62708-297-6
... of alloying on structure and composition and explains how alloy content can be controlled to optimize properties and behaviors such as ductility, strength, toughness, fatigue and fracture resistance, and resistance to corrosion, wear, and high-temperature creep. It also examines the effect of alloying...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170495
EISBN: 978-1-62708-297-6
..., and, to these, almost all welding processes have been successfully applied at some time. The weld fabrication of these materials is straightforward in that they usually do not require preheat or postheat, and interpass temperature control during welding is normally not critical. The precipitation-hardenable alloys...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820013
EISBN: 978-1-62708-339-3
... levels of joint restraint. Much of the steel in this carbon range is used for rolled structural plate and tubular products. These steels are generally killed or semi-killed and are usually supplied in the hot-rolled condition. The presence of surface scale (iron oxide) from the high-temperature rolling...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930039
EISBN: 978-1-62708-359-1
... 0.068 42 1.7 180 18 4.2 1.7 9 E71T8-K6 1.73 0.068 42 1.7 180 18 4.5 1.8 Additional specifications include: 12.7 mm (0.50 in.) wall thickness; 1.59 mm (0.0625 in.) land; 1.59 mm (0.0625 in.) gap; 60° bevel in groove; vertical down position; preheat and interpass temperature of 150...