90 Years Of Development History Of Duplex Stainless Steel 2020 is the 90th anniversary history of duplex stainless steel Avesta Ironworks in 1930, located in Avesta, Sweden 1930s to 1970s In the early 1900s history of duplex stainless steel, the earliest stainless steels were pure austenite, ferrite or martensite. In 1930, Sweden's A ...
roger chen - kaysuns industry limited
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