Tag Archives: low alloy steels

Effects of Sulfur and Overloads on the Fatigue Performance of Low-Alloy Steels

In earlier posts, the effect of sulfur on the fatigue performance of low-alloy steel was examined.  It was noted that sulfur is present as manganese sulfides in steels, and these sulfides are highly plastic at hot working temperatures.  During hot … Continue reading

Posted in News | Tagged , , , | Leave a comment

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

Posted in News | Tagged , , , , , | 4 Comments

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

Posted in News | Tagged , , , , , , , | 2 Comments

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

Posted in News | Tagged , , , , , , , , , | Leave a comment

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

Posted in News | Tagged , , , , | Leave a comment

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

Posted in News | Tagged , , , , , , , | 6 Comments

Fatigue Performance As Measured By Fatigue Strength Quenched and Tempered Steels

In a recent posting, a comparison of the fatigue properties for normalized steels (163-259 BHN) showed that the strain-life curves fell within a rather narrow band, especially in the long-life regime.  It was pointed out that, under a circumstance such … Continue reading

Posted in News | Tagged , , , , , , , , , , , , | Leave a comment