About Us
The Long Products Market Development Group (LPMDG), formed in 1997, provides a unique forum for long products steel producers. Through the support of Steel Market Development Institute, the LPMDG is growing the market for value-added steel bar and rod products. With member companies and task forces--Automotive/Heavy Equipment and Construction/ Infrastructure--the group is committed to developing innovative solutions to the challenges facing their clients and the steel industry.
SMDISteel
- We examine case & core fatigue data for 3 low alloy carburizing steels in this Bar Fatigue Blog post. #SteelMatters… twitter.com/i/web/status/9… 1 hour ago
- How important is R&D to SMDI member @SSAB_AB? Let's see what the executives have to say: ow.ly/yI8p30fOyVE https://t.co/R1trAUIWxh 23 hours ago
- A 78% high-strength steel frame? We approve. So do the @TXAutoWriters. Add the #TruckofTexas to @Ford's mantle:… twitter.com/i/web/status/9… 1 day ago
- RT @CSSBI: The North American steel industry has created EPDs for nearly all steel construction products. #BuildSteel https://t.co/ky5sJ5tR… 1 day ago
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Steel Market Development Institute
2000 Town Center Suite 320
Southfield, MI 48075
248.945.4777Blog Archive
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Tag Archives: fatigue
Strength and Fatigue Life versus Carbon Content at High Hardness (60 HRC)
The strength, fatigue and hardness data for several iterations with a high hardness level, around 60 HRC are shown in Table 1. The steels in these iterations are both plain carbon and low alloy grades with carbon contents ranging from … Continue reading
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Tagged carbon, Carburizing, fatigue, hardness, induction, iterations, MPa, quench, strength, tempering
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Additional Data on the Effects of Cooling Rate on the Overload Fatigue Properties of Carburized Steels
In the previous post (Dec. 30, 2016), the effects of cooling rate on both constant amplitude and overload core fatigue properties of a carburized Ni-Cr-Mo alloy steel (4320) were compared. As was noted, the study involved subjecting steel bars of … Continue reading
Effect of Steel Composition on the Case and Core Fatigue Properties of Low Alloy Carburized Steels
In earlier posts, limited data indicated that the fatigue properties of the cores of carburized components do not vary significantly with the composition of low alloy steels. There was evidence, however, that the fatigue properties of the cases of carburized … Continue reading
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Tagged 20MnCr5, fatigue, low alloy steels, SAE 4320, SAE 9310, Steel Composition
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Additional Data on the Effect of Cooling Rate on the Fatigue Properties of Carburized Steels
In the previous post, the effects of a cooling rate change after carburizing, due to a change in steel bar diameter, on core fatigue properties was examined. The data was developed for a Ni-Cr-Mo low alloy steel (SAE 4320), and … Continue reading
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Tagged bainite, carburized steels, cooling rate, fatigue, ferrite, low alloy steels, microstructure, Ni-Cr-Mo
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Effect of Cooling Rate after Carburizing on the Fatigue Properties of Carburized Steels
In earlier posts, the fatigue properties of various carburized low alloy steels were examined. Both case and core properties were evaluated. Since carburized components are manufactured in various section sizes, it can be expected that cooling rates in the cores … Continue reading
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Tagged bainite, Carburizing, cooling rate, fatigue, ferrite, hardness, low alloy steels, martensite, microstructure, tensil
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Additional Effects of Sulfur on the Fatigue Properties of Low Alloy Steels
In the previous posting, it was shown that, as a result of the presence of elongated manganese sulfide inclusions, the fatigue properties of low alloy steels can exhibit directionally dependent behavior. Fatigue properties obtained in a test direction transverse to … Continue reading
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Tagged fatigue, martensite, steel, strain-life, strain-life curves, sulfur
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The Effects of Sulfur on the Fatigue Properties of Low Alloy Steels
It is well known that sulfur has a major impact on some of the properties of low alloy steels. Sulfur is present in the form of manganese sulfides, which are highly plastic at hot working temperatures. As a result, during … Continue reading
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Tagged fatigue, low alloy steels, manganese sulfides, SAE 4140, sulfur
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Comparison of Through-Induction Hardening with Conventional Hardening
Two methods are often used to through harden and low alloy steels. The well recognized conventional hardening method involves heating to an appropriate austenitizing temperature for a specific length of time in a furnace with or without a protective atmosphere. This … Continue reading
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Tagged austenitizing, bainite, fatigue, ferrite, hardening, low alloy steels, medium carbon steel, SAE 4140
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Hot Formed and Controlled Cooled Microalloyed Steels Compared to Quenched and Tempered Medium Carbon Steels
Microalloyed steels are often used in the as-formed or as-forged condition in applications where the use of medium carbon steels would require that the component be quenched and tempered. Microalloyed steels, which contain small additions of niobium and/or vanadium, therefore … Continue reading
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Tagged 15V24 steel, bainite, carbon, fatigue, manganese, martensite, microalloyed steel, SAE 1038, vanadium
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Repeatability Study: SAE 4140 Steel
As part of the development of the Bar Steel Fatigue Database, AISI undertook a limited investigation to examine the amount of scatter that might be expected from fatigue data. Of particular concern was scatter that might result due to securing … Continue reading
