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                圆钢

                Grade Diameter(mm) Standard C Si Mn P S Ni Cu Cr
                20  
                ¢18-60 ¢50-130 ¢160-230
                 
                GB/T
                0.17-0.23 0.17-0.37 0.35-0.65 ≤0.035 ≤0.035 ≤0.30 ≤0.25 ≤0.25
                45 0.42-0.50 0.17-0.37 0.35-0.65 ≤0.035 ≤0.035 ≤0.30 ≤0.25 ≤0.25

                优质碳素☉结构圆管坯Quality Carbon Structural Steel Seamless Tube Blank
                Grade Diameter(mm) Standard C Si Mn P S Ni Cu Cr
                10  
                ¢50-130 ¢160-230
                 
                GB/T
                0.07-0.13 0.17-0.37 0.35-0.65 ≤0.035 ≤0.035 ≤0.30 ≤0.25 ≤0.15
                20 0.17-0.23 0.17-0.37 0.35-0.65 ≤0.035 ≤0.035 ≤0.30 ≤0.25 ≤0.25
                 
                 合金结构钢Alloy Structure Steel
                Grade Diameter(mm) Standard C Si Mn P S Ni Cu Cr Mo
                40Cr ¢18-60 GB/T 0.37-0.44 0.17-0.37 0.50-0.80 ≤0.035 ≤0.035 ≤0.30 ≤0.30 0.80-1.10 ≤0.15
                 
                轴承钢Bearing Steel
                Grade Diameter(mm) Standard C Si Mn P S Ni Cu Cr O Mo
                GCr15 ¢18-60 GB/T 0.95-1.05 0.15-0.35 0.25-0.45 ≤0.025 ≤0.025 ≤0.30 ≤0.30 1.40-1.65 12*10ˉ6 ≤0.10
                GCr4 ¢18-60 GB/T 0.95-1.05 0.15-0.30 0.15-0.30 ≤0.025 ≤0.020 ≤0.25 ≤0.20 0.35-0.50 12*10ˉ6 ≤0.08
                GCr15SiMn ¢18-60 GB/T 0.95-1.05 0.45-0.75 0.95-1.25 ≤0.025 ≤0.025 ≤0.30 ≤0.25 1.40-1.65 12*10ˉ6 ≤0.10
                 
                 齿轮钢Gear Steel
                Grade Diameter(mm) Standard C Si Mn P S Ni Cu Cr V Ti Mo
                20CrMnTi ¢18-60 GB/T 0.17-0.23 0.17-0.37 0.80-1.10 ≤0.035 ≤0.035 ≤0.30 ≤0.30 ≤1.00-1.30 0.04-0.10 ≤0.15

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