灰铸铁的牌号及力学性能
<TABLE class=table1 borderColor=#000000 cellSpacing=0 cellPadding=0 width="90%" align=center border=1><TBODY><TR bgColor=#e9fde2><TH colSpan=2 height=20>牌 号</TH><TH colSpan=2 height=20>单铸试棒的力学性能</TH><TH colSpan=4 height=20>不同壁厚的铸件力学性能</TH></TR><TR><TH height=24 rowSpan=2>新 牌 号</TH><TH height=24 rowSpan=2>旧 牌 号</TH><TH colSpan=2 height=20>σ<SUB><>b</SUB><>不小于</TH><TH colSpan=2 height=20>铸件壁厚(mm)</TH><TH colSpan=2 height=20>σ<SUB><>b</SUB><>不小于</TH></TR><TR><TH height=16>(MPa)</TH><TH height=16>(kgf/mm<SUP>2</SUP><>)</TH><TH height=16>＞</TH><TH height=16>≤</TH><TH height=16>(MPa)</TH><TH height=16>(kgf/mm<SUP>2</SUP><>)</TH></TR><TR><TD align=left height=64 rowSpan=4> HT100</TD><TD align=left height=64 rowSpan=4> HT10-26</TD><TD align=middle height=64 rowSpan=4>100</TD><TD align=middle height=64 rowSpan=4>10.2</TD><TD align=middle height=16>2.5</TD><TD align=middle height=16>10</TD><TD align=middle height=16>130</TD><TD align=middle height=16>13.3</TD></TR><TR><TD align=middle height=16>10</TD><TD align=middle height=16>20</TD><TD align=middle height=16>100</TD><TD align=middle height=16>10.2</TD></TR><TR><TD align=middle height=16>20</TD><TD align=middle height=16>30</TD><TD align=middle height=16>90</TD><TD align=middle height=16>9.2</TD></TR><TR><TD align=middle height=16>30</TD><TD align=middle height=16>50</TD><TD align=middle height=16>80</TD><TD align=middle height=16>8.2</TD></TR><TR><TD align=left height=64 rowSpan=4> HT150</TD><TD align=left height=64 rowSpan=4> HT15-33</TD><TD align=middle height=64 rowSpan=4>150</TD><TD align=middle height=64 rowSpan=4>15.3</TD><TD align=middle height=16>2.5</TD><TD align=middle height=16>10</TD><TD align=middle height=16>175</TD><TD align=middle height=16>17.8</TD></TR><TR><TD align=middle height=16>10</TD><TD align=middle height=16>20</TD><TD align=middle height=16>145</TD><TD align=middle height=16>14.8</TD></TR><TR><TD align=middle height=16>20</TD><TD align=middle height=16>30</TD><TD align=middle height=16>130</TD><TD align=middle height=16>13.3</TD></TR><TR><TD align=middle height=16>30</TD><TD align=middle height=16>50</TD><TD align=middle height=16>120</TD><TD align=middle height=16>12.2</TD></TR><TR><TD align=left height=64 rowSpan=4> HT200</TD><TD align=left height=64 rowSpan=4> HT20-40</TD><TD align=middle height=64 rowSpan=4>200</TD><TD align=middle height=64 rowSpan=4>20.4</TD><TD align=middle height=16>2.5</TD><TD align=middle height=16>10</TD><TD align=middle height=16>220</TD><TD align=middle height=16>22.4</TD></TR><TR><TD align=middle height=16>10</TD><TD align=middle height=16>20</TD><TD align=middle height=16>195</TD><TD align=middle height=16>19.9</TD></TR><TR><TD align=middle height=16>20</TD><TD align=middle height=16>30</TD><TD align=middle height=16>170</TD><TD align=middle height=16>17.3</TD></TR><TR><TD align=middle height=16>30</TD><TD align=middle height=16>50</TD><TD align=middle height=16>160</TD><TD align=middle height=16>16.3</TD></TR><TR><TD align=left height=64 rowSpan=4> HT250</TD><TD align=left height=64 rowSpan=4> HT25-47</TD><TD align=middle height=64 rowSpan=4>250</TD><TD align=middle height=64 rowSpan=4>25.5</TD><TD align=middle height=16>4.0</TD><TD align=middle height=16>10</TD><TD align=middle height=16>270</TD><TD align=middle height=16>27.5</TD></TR><TR><TD align=middle height=16>10</TD><TD align=middle height=16>20</TD><TD align=middle height=16>240</TD><TD align=middle height=16>24.5</TD></TR><TR><TD align=middle height=16>20</TD><TD align=middle height=16>30</TD><TD align=middle height=16>220</TD><TD align=middle height=16>22.4</TD></TR><TR><TD align=middle height=16>30</TD><TD align=middle height=16>50</TD><TD align=middle height=16>200</TD><TD align=middle height=16>20.4</TD></TR><TR><TD align=left height=48 rowSpan=3> HT300</TD><TD align=left height=48 rowSpan=3> HT30-54</TD><TD align=middle height=48 rowSpan=3>300</TD><TD align=middle height=48 rowSpan=3>30.6</TD><TD align=middle height=16>10</TD><TD align=middle height=16>20</TD><TD align=middle height=16>290</TD><TD align=middle height=16>29.6</TD></TR><TR><TD align=middle height=16>20</TD><TD align=middle height=16>30</TD><TD align=middle height=16>250</TD><TD align=middle height=16>25.5</TD></TR><TR><TD align=middle height=16>30</TD><TD align=middle height=16>50</TD><TD align=middle height=16>230</TD><TD align=middle height=16>23.5</TD></TR><TR><TD align=left height=48 rowSpan=3> HT350</TD><TD align=left height=48 rowSpan=3> HT35-60</TD><TD align=middle height=48 rowSpan=3>350</TD><TD align=middle height=48 rowSpan=3>35.7</TD><TD align=middle height=16>10</TD><TD align=middle height=16>20</TD><TD align=middle height=16>340</TD><TD align=middle height=16>34.7</TD></TR><TR><TD align=middle height=16>20</TD><TD align=middle height=16>30</TD><TD align=middle height=16>290</TD><TD align=middle height=16>29.6</TD></TR><TR><TD align=middle height=16>30</TD><TD align=middle height=16>50</TD><TD align=middle height=16>260</TD><TD align=middle height=16>26.5</TD></TR></TBODY></TABLE>
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