hot cracking in steel

The effects of phosphorus and sulfur on susceptibility to

@article{osti_20005573, title = {The effects of phosphorus and sulfur on susceptibility to weld hot cracking in austenitic stainless steels}, author = {Li, L and Messler, RW Jr}, abstractNote = {Five heats of Type 308 austenitic stainless steel were custom designed and melted with equal combined phosphorus and sulfur (P+S) levels of 0032.

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Role of Delta Ferrite in Austenitic Stainless steel weld

Aug 17, 2015· Major role of delta-Fe in in Austenitic Stainless steel weld is to avoid hot cracking or solidification cracking Minimum 5% delta-Fe is required in weld to avoid hot cracking And, if delta-Fe content is increased then tendency of embrittlement of the weld increases, which means lower impact values of weld Following explanation is taken from.

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What is hot cracking (solidification cracking)?

Both solidification cracking and hot cracking refer to the formation of shrinkage cracks during the solidification of weld metal, although hot cracking can also refer to liquation cracking Solidification cracks can appear in several locations, and orientations, but most commonly are longitudinal centreline cracks (coincident with the intersection of grains growing from opposite sides of the.

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Stainless Steels

STAINLESS STEELS Austenitic stainless steels include the 200 and 300 series of which type 304 is the most common The primary alloying additions are chromium and nickel Ferritic stainless steels are non-hardenable Fe-Cr alloys Types 405, 409, 430, 422 and 446 are representative of this group Martensitic stainless steels are similar in.

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Welding Carbon Steel

May 09, 2017· Examples of low carbon steel suitable for welding include C1008, C1018, A36, A1011 and A500 Medium carbon steel such as C1045 typically requires preheat and post-heat treatment to avoid weld cracking High carbon steel is even more prone to weld cracking than the other two groups of carbon steel.

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Welding Carbon Steel

May 09, 2017· Examples of low carbon steel suitable for welding include C1008, C1018, A36, A1011 and A500 Medium carbon steel such as C1045 typically requires preheat and post-heat treatment to avoid weld cracking High carbon steel is even more prone to weld cracking than the other two groups of carbon steel.

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Welding defect

The crack starts at the fusion line and extends up through the weld They are usually caused by too much voltage or not enough speed Hot cracking Hot cracking, also known as solidification cracking, can occur with all metals, and happens in the fusion zone of a weld.

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Carbon Equivalent

As such, the value of the Carbon Equivalent is a useful guide to the possibility of cracking in alloy steels by comparison with an equivalent plain carbon steel The two main problems faced in the cracking of the welded metals are hot cracking and cold cracking.

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Hot Cracking vs Cold Cracking

Hot Cracking Hot cracking is mainly due to high amounts of elements with low melting temperatures in the base material Slightly elevated amounts of these elements is usually not enough to cause cracking, but rather it couples with other issues such as improper width to depth ratio of the weld bead Some elements used in steel making like.

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TROUBLESHOOTING CRACKS IN STEEL CASTINGS

TROUBLESHOOTING CRACKS IN STEEL CASTINGS By Rodman Duncan Casteel Technical Service [email protected] , of Steel Founder’s Society of America in order to serve as a framework which can be used to identify the cause of cracks in steel castings and determine the appropriate corrective , hot crack, stress crack,etc 2 Sub-surface shrink.

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Investigation of Hot Cracking Phenomena in Light-Weight

Investigation of Hot Cracking Phenomena in Light-Weight Armor Steel Based on the FeMnAl-C Alloy System William Evans Antonio J Ramirez, PhD Department of Welding Engineering The Ohio State University Columbus, OH Katherine Sebeck, PhD US Army TARDEC Warren, MI.

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On the hot cracking of HSLA steel welds: Role of epitaxial

In the present study, hot cracking of two steels (ASTM A656 Grade 80 and A572 Grade 50 HSLA steels) during the GMAW welding process was investigated, with the following results: • Of the two HSLA steels, the G50 welds (less alloyed material) were less susceptible to hot cracking than G80 welds.

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Guidelines for fabricating and processing plate steel

elements Its presence in a steel is also highly beneficial to surface quality in that it tends to combine with sulfur, thereby minimizing the formation of iron sulfide, the causative factor of hot-shortness, or susceptibility to cracking and tearing at rolling temperatur.

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7 Causes of Quench Cracking in Steel : Production Machining

Jul 13, 2017· If the steel is an oil-hardening steel, the use of these overly aggressive quenchants will lead to cracking Making an improper selection of steel for the process Too much time between the quenching and the tempering of the heat-treated parts A common misconception is that quench cracks can occur only while the piece is being quenched.

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Defects

On breaking open the weld, the crack surface in steel and nickel alloys may have a blue oxidised appearance, showing that they were formed while the weld metal was still hot Metallography The cracks form at the solidification boundaries and are characteristically interdendritic.

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Difference Between Hot and Cold Rolled Steel

Sep 11, 2014· Customers often ask us about the differences between hot rolled steel and cold rolled steelThere are some fundamental differences between these two types of metalThe differences between hot rolled steel and cold rolled steel relates to the way these metals are processed at the mill, and not the product specification or grade.

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Why You Shouldn’t Weld Carbon and Stainless Steel Wire

Hot Cracking of the Stainless Steel Because it is more electrically-resistant than carbon steel, stainless heats up much faster in electrical resistance welds than carbon steel While waiting for the carbon steel to reach weld temperature, the stainless can overheat and become riddled with hot cracks.

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4 of the Best Methods to Detect Defects in Carbon Steel

Tangential eddy current array (TECA™) is a blend of multiplexed tangential coils and pancake coils, specifically designed to detect surface-breaking cracks in carbon steel welds The TECA coil arrangement and operating mode yield unique eddy current signals from surface-breaking cracks in carbon steel, enabling the sizing of their depth.

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Ferritic Stainless Steel Properties and Applications

With a higher molybdenum content, these ferritic stainless steel grades have enhanced corrosion resistance and are used in hot water tanks, solar water heaters, exhaust system parts, electric kettles, microwave oven elements, as well as the automotive trip.

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Carbon Equivalent

As such, the value of the Carbon Equivalent is a useful guide to the possibility of cracking in alloy steels by comparison with an equivalent plain carbon steel The two main problems faced in the cracking of the welded metals are hot cracking and cold cracking.

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How to Avoid Cracking in Aluminum Alloys

Hot cracking is the cause of almost all cracking in aluminum weldments Hot cracking is a high-temperature cracking mechanism and is mainly a function of how metal alloy systems solidify This cracking mechanism is also known as hot shortness, hot fissuring, solidification cracking and liquation cracking.

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Mechanisms of Stress-Corrosion Cracking

2 Stress-Corrosion Cracking Table 1 Alloy/Environment Systems Exhibiting SCC Alloy Carbon steel High-strength steels Austenitic stainless steels High-nickel alloys a-brass Aluminum alloys Titanium alloys Magnesium alloys Zirconium alloys Environment Hot.

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What is a Hot Shortness?

Hot shortness means that the steel literally breaks apart during hot rolling, resulting in a scrapped product If aluminum is hot short, it means that it has a tendency to crack when it reaches a certain temperature range That is why when tack welds aluminum without using filler metal, it cracks.

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