50mm Wall Thickness Structural Steel Tube Carbon Steel JIS G3445 Standard

JIS G3445 STKM 11A 50mm Wall Thickness Carbon Seamless Steel Tube Structural Steel Pipe

JIS G 3445 STKM 11A STKM 12 (ABC) STKM 13(ABC) STKM 14(ABC) STKM 15 Carbon Steel Tubes for machine structural purposes
JIS G 3445 Carbon steel tubes for machine structural purposes
Application: for machine structural purposes
Size range:OD 5-420mm WT 0.5-50mm Length 12m max
Grade:
STKM 11A
STKM 12 (ABC)
STKM 13(ABC)
STKM 14(ABC)
STKM 15(AC) etc
Heat treatment: (Please specify the delivery condition and heat treatment requirement when sending the enquiry.)

HR hot rolled
CW cold worked
SR stress relieved
A annealed
N normalized
HF hot formed

Note:1. When the purchaser require product analysis for the tubes made of killed steel, the tolerances for the values given above shall be as specified in the Table 2 in JIS G 0321 for seamless steel tubes and in Table 1 for electric resistance welded or butt welded steel tubes
2. For the tubes of STKM 15 made by electric resistance welding process, the lower limit of carbon content may be
Altered by agreement between the parties concerned.
3. For the tubes of STKM 20,Nb in combination with V may be added, in the case, the maximum content of Nb+V shall be 0.15%

The tolerances on outside diameter and wall thickness for the tubes shall be as given in Table 4 and Table 5,respectively.