JIS G 1239:2014 specifies an infrared absorption method after fusion under inert gas for the determination of oxygen in iron and steel. This method is applicable to mass fraction of oxygen 0.000 5 % or over up to and including 0.05 %.
JIS G 1239:2014
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Iron and steel — Determination of oxygen — Infrared absorption method after fusion under inert gas
Japanese Industrial Standard / Japanese Standards Association , 01/01/2014
