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DIN EN 10089:2003
Hot rolled steels for quenched and tempered springs - Technical delivery conditions
This European Standard specifies the technical delivery requirements for round and flat bars, ribbed and grooved bars and rod manufactured from alloy steels intended for hot-formed and subsequently heat-treated springs or cold-formed and subsequently heat-treated springs. The products are supplied in one of the heat-treatment conditions given for the different types of products and in one of the given surface conditions.
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Deutsches Institut für Normung [din]