VDA 238-205 (09/2024)

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VDA 238-205 Prüfung der Empfindlichkeit höchstfester Flacherzeugnisse aus Stahl gegenüber wasserstoffinduzierter Rissbildung / Testing of the susceptibility of advanced high strength steel sheets to hydrogen-induced cracking / 4-Punkt-Biegeversuch für warmumgeformte Stähle / 4-Point-Bending-Test for Hot Formed Steels (09/2024) - Gruppenlizenz (group license), AGB (GTC) Art. 10, 2 - Language of the document German and English

Since hydrogen embrittlement can lead to safety relevant issues shis document describes the 4-point bending test on flat samples of hot-formed steels to determine the sensitivity to hydrogen-induced delayed cracking.

Different influencing variables can be evaluated, such as

• material (microstructure),

• coating,

• mechanical properties and hardness,

• heat treatment parameters and

• furnace atmosphere.

The 4-point bending test is usually carried out as part of a material and/or coating approval of hot-formed steels.

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