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灰铸铁件的抗拉强度（GB/T9439-1988牌号铸件壁厚/mm2(T b> MPa ( kgf/mm )HT1002.510130 (13.3)1020100 (10.2)203090 (9.2 )305080 (8.2 )HT1502.510175 (17.8)1020145 (14.8)2030130 (13.3)3050120 (12.2)HT2002.510220 (22.4)1020195 (19.9)2030170 (17.3)3050160 (16.3)HT250410270 (27.5)1020240 (24.5)2030220 (22.4)3050200 (20.4)HT3001020290 (29.6)2030250 (25.5)3050230 (23.5)HT3501020340 (24.7)2030290 (29.6)3050260 (26.5)