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By certification 
Equivalent grades GB DIN AISI BS JIS
9CrWMn 1.2510 O1 BO1 SKS3
Chemical Composition C Si Mn Cr P S V W
0.90-1.05 0.15-0.35 1.00-1.20 0.50-0.70 0.03MAX 0.03MAX 0.05-0.15 0.50-0.70
Available size Round Bar Diameter Length
10-380mm 2000-5800mm
Flat Bar Thickness Width Length
12-500mm 60-900mm 2000-5800mm
Surface condition Black surface/ Grinded/ Machined
9CrWMn 1.2510 O1 BO1 SKS3
Chemical Composition C Si Mn Cr P S V W
0.90-1.05 0.15-0.35 1.00-1.20 0.50-0.70 0.03MAX 0.03MAX 0.05-0.15 0.50-0.70
Available size Round Bar Diameter Length
10-380mm 2000-5800mm
Flat Bar Thickness Width Length
12-500mm 60-900mm 2000-5800mm
Surface condition Black surface/ Grinded/ Machined
