最新国内外碳素钢钢号对照表钢号中国美国英国日本法国德国优质碳素结构钢GBASTMBSJISNFDIN50F1005015A03D6-208F≈1008040A04S9CKUSt4081008045M10S9CKXC610F≈1010040A10XC10USt13101010045M10S10CXC10C10,CK10151015080M15S15CXC15C15,CK15201020070M20S20CXC18,C22EC22E,CK222510250...

时间:2024-09-25 11:59栏目:中学教育