International standard for grades of wrought tool steels revised
BSI, the business standards company, has revised its standard for cold formed welded steel. BS EN ISO 4957:2018 Tool steels replaces the previous version of this standard published in 1999.
The revised standard will be of particular interest to producers of wrought tool steels; welding manufacturers; structural steel manufacturers; and all types of hot-rolled, forged, cold-drawn or cold-rolled products.
Specifically, BS EN ISO 4957 lists the requirements for the following grades of wrought tool steels:
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Non-alloy cold-work tool steels
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Alloy cold-work tool steels
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Alloy hot-work tool steel
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High-speed tool steels
The standard applies to all types of hot-rolled, forged, cold-drawn or cold rolled products produced by power metallurgy. The main changes compared with the withdrawn 1999 edition are:
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The delivery conditions normalized/normalized rolled has been introduced
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The surface quality, ISO 9443 for bars and ISO 7788 for plates now apply
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An additional clause for sorting and reprocessing has been introduced
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The normative references have been updated
Dan Palmer, Head of Manufacturing at BSI, said: “BS EN ISO 4957 will be a boon to welding manufacturers, mechanical engineers, and machine part manufacturers. The steel industry is increasingly cross-border, and fittingly, the requirements in this standard are global.”
The following UK organizations were represented in the development of BS EN ISO 4957: British Stainless Steel Association; Cold Rolled Sections Association; Institute of Spring Technology; The Catering Equipment Suppliers Association; UK Steel.
- ENDS -