国精产品一区一区三区,97久久精品无码一区二区,欧美老妇大P毛茸茸,两根黑人粗大噗嗤噗嗤视频

????????????????????ˉ??

???	???	???????(MPa)	???????(MPa)	????(%)
DIN 17175	St35.8	360-480	??235	??25
	St45.8	410-530	??255	??21
	15Mo3	450-600	??270	??20
	13CrMo44	440-590	??290	??20
	10CrMo910	450-600	??280	??18

???	???	??????
		C	Si	Mn	P??S	Cr	Mo
DIN 17175	St35.8	??0.17	0.10-0.35	0.40-0.80	??0.030	/	/
	St45.8	??0.21	0.10-0.35	0.40-1.20	??0.030	/	/
	15Mo3	0.12-0.20	0.10-0.35	0.40-0.80	??0.030	/	0.25-0.35
	13CrMo44	0.10-0.18	0.10-0.35	0.40-0.70	??0.030	0.70-1.10	0.45-0.65
	10CrMo910	0.08-0.15	??0.50	0.40-0.70	??0.030	2.00-2.50	0.90-1.20