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瓊海螺旋鋼管有限公司 三亞大口徑無縫鋼管 15CrMo 28Mn2 45Xl CL-23 S43C SAE8620H(S) ? 15CrMoA 28MnSiB 49MnVS3(J) CL60 S43CVSl SAE8620H(Z) ? 15CrMoG 30CrNi2.5MoV 50Cr Cm45 S45C SC72A ? 16CrMnBHZ 30Mn 50CrV4 C級 S45CSl SC82A ? 16MnCr5 30Mn2 50CrVA DS-7 S45CVMn SCM420H ? 16MnCrS5 30MnVS 50Mn F40MnV S45SC SCN435H ? 17CrMnBHZ 30SiMn2MoVA 51CrV4 FAS3550 S48C SCM440 ? 17CrNiMo6 33Mn2V 51CrMoV4 G20Cr2NiA S50C SCM440H ? 18CD4 33Mn2V-3 52CrMoV4 GCr15 S53C SCM440H-D ? 18CrMnBHZ 34CrMo4 55A GCr15SImN 53CG SCr420 ? 1E0669 34Mn2V 55Cr3 GGCr15 S55C SCr420H ? 1E1106 35Cr3NiMoA 55Cr3Hl GJ40CrV S55CG SCr420HB ? 1E1239D 35Mn2 55CrMnA GrADE 70LS C55C-SV SCr440H ? 1E1287 35MnBM 55SiCr H13 SA-210Al SF440A ? 1E1813 35VB 55SiMnVB HRB400 SA-210C SKF3 ? 20Cr-40Cr 37CrMnMoA 60CrMnA L20Mn2 SA-213 T11 SKF3S ? 20CrMn 37Mn5 60CrMnBA LC08 SA-