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GB/T 3077 20CrNiMo round bars
GB/T 3077 20CrNiMo alloy structural steel under GB/T 3077 chinese standard, belongs to a high carbon nitrided steel. GB/T 3077 20CrNiMo can be produced into hot rolled round bars and square bars, cold-drawing bars,forged bars. We henan bebon can supply GB/T 3077 20CrNiMo all of shapes.
GB/T 3077 20CrNiMo round bar
GB/T 3077 20CrNiMo round bars is mainly for manufacturing shock absorber which works in quaking load,such as elastic axis, torsion shaft of heavy-duty car and driving truck.GB/T 3077 20CrNiMo round bars has excellent hardenability, without temper brittleness, good weldablity, super machinability and ductility. GB/T 3077 20CrNiMo round bars is generally used in quenching and tempering or carburizing and quenching delivery state.
According to the market needs, henan bebon supply the oversea markets for GB/T 3077 20CrNiMo hot rolled round bars OD 6mm -80 mm and 20CrNiMo forged round bars OD 80 mm - 1200 mm, also GB/T 3077 20CrNiMo forged square bars OD 100- 1200 mm. The OD tolerance is about 0-3 mm and length tolerance is about 0-20 mm.
GB/T 3077 20CrNiMo 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 3077 20CrNiMo round bars chemical composition by %,maximum:
Grade |
C |
Si |
Mn |
Cr |
Ni |
Mo |
Cu |
P |
S |
GB/T 3077 20CrNiMo |
0.17-0.23 |
0.17-0.37 |
0.6-0.95 |
0.4-0.7 |
0.35-0.75 |
0.2-0.3 |
≤ 0.3 |
≤0.035 |
≤0.035 |
GB/T 3077 20CrNiMo round bars mechanical properties
Grade |
Delivery State |
T.S. |
Y.S. |
A,% |
Z,% |
Hardness, |
Forging ratio |
Grain Size |
Nonmetal ratio |
GB/T 3077 20CrNiMo |
Hot rolled, forged, or heat treatment |
980 |
785 |
9 |
40 |
197 |
≥ 4:1 |
≥ 6 |
≤ 2.0 |
If you need GB/T 3077 20CrNiMo high carbon nitrided steel round bar, or other grades,pls be free to contact us -- BEBON STEEL.