Brand:LAIGANG,JUNENG
MOQ:20
Quantity:100
AISI4140 Steel Round Bar
1.Chemical Composition
| Grade | C | Si | Mn | Cr | Mo | Ni | Cu | P | S |
| AISI4140 | 0.38-0.41 | 0.15-0.35 | 0.85-1.00 | 0.8-1.1 | 0.15-0.25 | Max0.25 | Max0.35 | Max0.015 | Max 0.040 |
2.Mechanical Property
| Grade | Tensile Strength (MPa) | Yield Strength δ5 (%) | Area Reduction ψ (%) | Impact Work Akv (J) | NotchedBar impact Strengthαkv (J/cm2) | Hardness | Sample Size |
| AISI4140 | Min1080 (110) | Min12 | Min45 | Min63 | Min78(8) | Max217HB | 25mm |
3.Size Tolerance
Length tolerance: 100mm/-0mm
Side length tolerance: /-2mm
Straightness: max 6mm/m
4.Both end of each bar must be cut.
Ladle furnaced and vacuum de-gassed
Show Heat NO. on each bar
Surface condition: The surface of the hot rolled round/ square bar shall be free cracks, scar and wrinkles at affect the use of the billets. In case there is the above-mentioned defect.it shall be remove.The mill test certificate shall show the chemical composition, and it is guaranteed that the chemical composition shall be within the limit stipulated in the contract.
