1.Grade:42CrMo 42CrMo4 SAE4140 AISI4140 42CD4 708M40 708A42 709M40 1.7225 2.Size:12-300mm 3. MOQ:20mt
42CrMo 42CrMo4 SAE4140 AISI4140 42CD4 708M40 708A42 709M40 1.7225 steel round bar
1.Grade:42CrMo 42CrMo4 SAE4140 AISI4140 42CD4 708M40 708A42 709M40 1.7225 2.Size:12-300mm3. MOQ:20mt
4. Standard Performed: ASTM A29/A29M-04
5. Chemical composition:
Grade | C | Si | Mn | P | S | Ni | Cr | Mo | Cu | Al |
AISI4140 | 0.38 0.41 | 0.15 0.35 | 0.85 1.00 | Max 0.015 | Max 0.040 | Max 0.25 | 0.80 1.10 | 0.15 0.25 | Max 0.35 | 0.012 0.030 |
6. Mechanical Property:
Name | Tensile Strength σb (MPa) | Yield Strength δ5 (%) | Area Reduction ψ (%) | Impact Work Akv (J) | Notched Bar impact Strength αkv (J/cm2) | Hardness | Sample Size |
No. | min 1080(110) | min 12 | min 45 | min 63 | min 78(8) | max 217HB | 25mm |
7. Size Tolerance:
Length tolerance: +100mm/-0mm
Side length tolerance: +/-2mm
Straightness: max 6mm/m
8. Quality Contation
Both end of each bar must be cut.
Ladle furnanced and vacuum de-gassed
Show heat No. on each bar
Surface condition the surface of the hot rolled square bar shall befree cracks, scar and wrinkles that 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.
Round bar steel
