Year1
- 材质：
- Q235B
- 规格：
- 219mm以上
- 质量等级：
- 正品（受质量异议）
Quality grade symbol Deoxidation method symbol
Quality grade is divided into grades with poor quality and grade with the highest quality. The deoxidation method symbols are and, which respectively represent boiling steel, semi-killed steel, killed steel and special killed steel. However, in the grade representation method, the symbols and can be omitted.
The different grades represent mainly different impact temperatures.
It means no impact, the difference is above degrees, above degrees, above degrees, above degrees, to the difference, refers to the difference in impact temperature in their performance.
They are divided into grades, which are not required for impact toughness test, grade for normal temperature (℃) impact toughness test, grade for ℃ impact toughness test, grade for ℃ impact toughness test, and grade for ℃ impact toughness test. The impact toughness test uses Charpy notch specimens. The impact toughness index is. The above grades of steel are required to meet their respective different temperature requirements. At different impact temperatures, the impact values are also different.
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