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GB/T 699 25# round bar
GB/T 699 25# carbon steel is a low carbon steel at chinese standard. Compared with GB/T 699 20# carbon steel, 25# has higher strength. Generally speaking, GB/T 699 25# round bars is used after normalizing treatment, to guarantee the good properties.
For GB/T 699 25# carbon steel,we henan bebon can offer forged round bars OD 80 mm - 1200 mm. GB/T 699 25# round bar is in a large need,so we henan bebon stock large quantity of forged bars in the warehouse, and various size round bars included. So if you need GB/T 699 25# round bar, pls be free to contact us.
According to its properties, GB/T 699 25# round bar can be used for producing welded structural parts, and some parts which are treated by forged,hot punching and machine work and bear small load,such as roller,shaft,coupler etc. For cars or tractors, GB/T 699 25# round bar can be produced to crossbeam,frame. Besides, 25# round bar are also available for manufacturing some carburization parts and carbonitriding parts.
GB/T 699 25# round bars are usually produced under the followed procedures: EAF arc furnace + LF purify affinage + VDF + ingot steel(bottom gating /argon) + forged + annealing + black polishing (turnery) + GB/T6402-92 ΙΙ UT test + smooth edges with sawing .
GB/T 699 25# round bars chemical composition by %,maximum
|
Grade |
C |
Si |
Mn |
P |
S |
Ni |
Cr |
Cu |
|
GB/T 699 25# |
0.22-0.29 |
0.17-0.37 |
0.5-0.8 |
≤0.035 |
≤0.035 |
≤0.3 |
≤0.25 |
≤0.25 |
GB/T 699 25# round bars mechanical properties
Grade |
Delivery State |
T.S. |
Y.S. |
A,% |
Z,% |
Hardness, |
Forging ratio |
Grain Size |
Nonmetal ratio |
|
GB/T 699 25# |
Hot rolled, forged, or heat treatment |
450 |
275 |
23 |
50 |
170 |
≥ 4:1 |
≥ 6 |
≤ 2.0 |
If you need GB/T 699 25# round bars, or other carbon steel round bars,pls be free to contact us.