第5 (碳素铸铁)(ASTM)GradeN1 GradeN2 GRADEU-415-205(60-30) Grade415-205(60-30) Grade450-240(65-35) Grade485-250(70-35) Grade485-275(70-40)(UNS) J02500 J03500 J03000 J03501 J02501 耐 铸钢CF-8 CG-12 CF-20 CF-8M CF-8C CF-16F CF-16Fa CH-10 CH-20 CK-20 CE-30 CA-15 CA-15M
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