Product Description

1. Production Name: Mandrel bar (Working Part)
2. Material: H*3/4Cr5MoSiV1
3. Chemical Composition:
Element  C  Mn  Si  P+S  S  Cr  Mo  V
(%) 0.***0.*2  ≤0.**0  0.***1.*0  ≤0.**0  ≤0.**8  4.***5.*0  1.***1.*0  0.***1.*0
4. Steel Melting: Electric Furnace + (BOF)Vacuum Degassed + Electroslag Remelt.
5. Hot Forming: Forged from an ingot. The ratio of the cross sectional area of the ingot to the resulting cross sectional area of the solid forging shall not be less than 8 to 1.
6. Mechanical properties:
Size
Q+T  Tensile Strength
MPa  Yield Strength MPa  Elongation
%  Reduction of area
%  Charpy V-notch Impact test J
(room temperature)  Hardness
HB
≤**0mm  ********4  ≥**1  ≥8  ≥*5  ≥*0  ******0
≥**0mm  ********4  ≥**2  ≥8  ≥*5  ≥*0  ******5
7. Chrome Plate Thickness: 0.****0.**0