Maximizing Weld Strength in Chrome Moly Space Frames

J. Wood, B. Jawad, and C. Riedel (USA)


weld, strength, space frame


Chromium Molybdenum Steel (AISI 4130), commonly referred to as “Chrome Moly”, is one of the most popular materials used in the construction of tubular space frames and chassis components for racing applications. Its high strength, light weight and comparably low material cost make the reasons for its popularity quite obvious. However, there is one problem that is commonly overlooked: maintaining the strength of Chrome Moly in areas exposed to high levels of heat followed by rapid cooling during welding. This paper seeks to gain a better understanding of the effects of cooling (due to welding) on the strength of Chrome Moly.

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