????Q345C??????EQ345C???o???EQ345C???????????
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Q345C??? ???????????????????
????Q345C????<16Mn:Q345A Q345B Q345C Q345D Q345E>
Q345C???????????
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Q345C?????????
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????12MnV????????-70????????????????????е???????1????????
????14MnNb??????18Nb????????????????????-20--450?????????????????
????16Mn?????????????????????????????????????????????????????????????????????????????е
????16MnRE??????16Mn????????????????????????16Mn?????????16Mn??
Q345C??????????
????C:0.12-0.20 Si:0.20-0.60 Mn:1.00-1.60 P:??0.035 S:??0.035 Ni:??0.30 Cr:??0.30 Cu:??0.20 Al:??0.015 V:0.02-0.15 Nb:0.015-0.06
Q345C???????????
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Q345C????????????
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Q345C ???????С?????0.035%
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