Nodes starting from DIA90mm diameter (90,110,130,160,200,240,280,300,350...) shall be produced with C45 quality material in conformance with the GB standard, with hot forging in normalized condition and/or machining production techniques.
Required bolt connection holes shall be drilled and tapped with digitally controlled drilling machines.
|
Material
|
Code
|
Spec.
|
Chemical Content |
Physical Performance |
||||||
|
C（%） |
Si（%） |
Mn（%） |
P（%） |
S（%） |
Tensile Strength σs（MPa） |
Yield Strength σb（MPa） |
Elongation δ（%） |
|||
|
C45 |
GB/T699-1999 |
Φ90mm-Φ350mm |
0.42~0.50 |
0.17~0.37 |
0.50~0.80 |
≤0.035 |
≤0.035 |
≥600 |
≥355 |
≥16 |
