ST12是德国标准（DIN1623)，相当于EN10130的DC01，JIS的SPCC，美标的ASTM A1008 CS，宝钢企标的Q/BQB 403 DC01
Slots with different depth were made by WEDM in metal sheet of ST12 to simulate slot-type defects.
在ST12冷轧板上用线切割加工出不同深度的狭缝来模拟钢板中缝类缺陷。
The result shows the reason why sealing washer parts destroyed is that carbon content of ST12 steel used is too low. High carbon content and strength material should be used to produce the parts.
结果表明，导致密封圈变形而破裂的原因是选用的ST12钢含碳量太低，应选用含碳量和强度稍高的材料来制造。
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