Content with alloy steel

ISO 898-2:2022 Fasteners - Mechanical properties of fasteners made of carbon steel and alloy steel – Part 2: Nuts with specified property classes Chemical composition as per ISO 898-2:2022 for typical grades Class Material and Treatment C Mn min. P max. S max. 8 (M16 and below) carbon steel NOT quenched and tempered (NQT) 0.06-0.58 0.25 0.060 0.150 8 carbon steel quenched and tempered (QT) 0.15-0.58 0.45 0.048 0.058 10 carbon steel quenched and tempered (QT) 0.
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Chemical composition as per ISO 898-1 for typical grades Class Material and Treatment C min. C max. P max. S max. B max. Tempering temp. [°C] 8.8 carbon steel with additives (e.g. b, mn or cr) quenched and tempered 0.15 (d) 0.40 0.025 0.025 0.003 425 8.8 carbon steel quenched and tempered 0.25 0.55 0.035 0.025 0.003 425 10.9 carbon steel with additives (e.g. b, mn or cr) quenched and tempered 0.
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