Mechanical properties of commonly used valve material ductile iron in China
2024/7/24??????view:
CODE | 鑄件壁厚/mm |
抗拉強(qiáng)度 σb/MPa |
屈服強(qiáng)度 σ0.2/MPa |
延伸率δ/% |
reference | |
≥ | 硬度HB | 主要金相組織 | ||||
QT400-18 | >30~60 | 390 | 250 | 18 | 130~180 | 鐵素體 |
>60~200 | 370 | 240 | 12 | |||
QT400-15A | >30~60 | 390 | 250 | 15 | 130~180 | 鐵素體 |
>60~200 | 370 | 240 | 12 | |||
QT500-7A | >30~60 | 450 | 300 | 7 | 170~240 | 鐵素體+珠光體 |
>60~200 | 420 | 290 | 5 | |||
注:字母“A”表示該牌號(hào)在附鑄試樣上測(cè)定的力學(xué)性能,以區(qū)別單鑄試樣上測(cè)定的力學(xué)性能。
Note: The letter "A" indicates the mechanical properties of the grade measured on the attached casting sample to distinguish it from the mechanical properties measured on the single casting sample. |
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