SAE4140 4150 Alloy steel bar

Brand:aa

Product detail:

SAE4140 4150 Alloy steel bar

1.Grade: SAE4140 4150 42CrMo4 50CrMo4 A193 B16
2.Dia:12-300mm
3.Length:5.5-12m
4.Hot rolling
5.MOQ:20tons

6.Chemical Composition

 

Grade	C	Si	Mn	Cr	Mo	Ni	Cu	P	S
4140	0.38 0.41	0.15 0.35	0.85 1.00	0.8 1.1	0.15 0.25	Max 0.25	Max 0.35	Max 0.015	Max 0.040	Al (0.012 0.0030)
4150	0.48 0.53	0.15 0.35	0.75 1.00	0.80 1.10	0.15 0.25	Max 0.25	Max 0.35	Max 0.035	Max 0..040	V (0.012 0.030)

 

7.Mechanical Property

Grade	Tensile Strength (MPa)	Yield Strength δ5 (%)	Area Reduction ψ (%)	Impact Work Akv (J)	Notched Bar impact Strength αkv (J/cm2)	Hardness	Sample Size
4140	Min1080 (110)	Min12	Min45	Min63	Min78(8)	Max217HB	25mm

 

8.Size Tolerance

Length tolerance: +100mm/-0mm

Side length tolerance: +/-2mm

Straightness: max 6mm/m

 

 

9.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.