Hot rolled alloy steel bar ASTM 4340

Hot rolled alloy steel bar ASTM 4340.
Delivery condition: Hot-rolled or forging

Alloy steel bar SAE 4340

Standards: ASTM, DIN,GB,JIS

Steel Grade:SAE4340,EN 24, 34CrNiMo6/ 40CrNiMoA

Delivery condition: Hot-rolled or forging

Process: EAF + LF + VD + Forged + Heat Treatment (optional)

Technical Conditions: GB/T3077-1999(China),

ROUND:Dia: 12mm-120mm,80mm-750mm
Length: 3m-6m

Composition :(%)

Grade	C	Si	Mn	P≤	S≤	Cr	Mo	Ni≤	Cu≤
SAE 4340	0.38-0.43	0.15-0.35	0.6-0.8	0.030	0.040	0.7-0.9	0.2-0.3	1.65-2.0	0.35

Grade	C	Si	Mn	P≤	S≤	Cr	Mo	Ni	Cu≤
GB40CrNiMoA	0.37-0.44	0.17-0.37	0.5-0.8	0.035	0.035	0.6-0.9	0.15-0.25	1.25-1.65	0.030

Mechanical Properties:

Yield (mpa)	Tensile (mpa)	Elongation(%)	Reduction(%)	Hardness(HB)
472	744	22	50	217

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