This standard specifies the alloy steel, low alloy steel, alloy steel chemical composition relative to the provisions of the finished steel smelting chemical composition boundary limit allowable deviation, and gives the definition of related terms.
ReL (MPa) | Rm (MPa) | Z (%) | A5.65 (%) | Heat treatment condition | Technology | Sampl |
---|---|---|---|---|---|---|
175(≥) | 295(≥) | 60(≥) | 35(≥) | Normalizing | 930℃ Heat preservation≥30min AC Normalizing | 25(Sampl size) |
HBS: 131(≤)