螺纹切削

铸铁

  硬度
(HB) 		抗拉强度
RM (N/mm2)		 延伸率
A (%)
铸铁 铸铁 <250 <850 <10
球墨/ 可锻铸铁 球墨/ 可锻铸铁 <250 <850 >10
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